Transmission gear set, transverse sealing device and packaging machine

Abstract

The utility model relates to a transmission gear set, a transverse sealing device and a packaging machine, the transmission gear set comprises a first gear and a second gear, a first intermediate gear and a second intermediate gear are arranged between the first gear and the second gear, and the first gear, the first intermediate gear, the second intermediate gear and the second gear are sequentially meshed. The first gear and the second gear are connected with a first driving shaft and a second driving shaft respectively, the first intermediate gear and the second intermediate gear are connected with a first gear shaft and a second gear shaft respectively, and an included angle theta is formed between the axis connecting line of the first intermediate gear and the second intermediate gear and the axis connecting line of the first gear and the second gear. And the included angle theta is adjusted to eliminate the gear backlash. The transverse sealing device is simple in overall structure and convenient and fast to operate, accurate adjustment can be achieved, the transmission accuracy and transmission performance of the gear set are guaranteed, meanwhile, packaging of high packaging objects is facilitated, the occupied space of the gear set is greatly reduced, and then the occupied space of the transverse sealing device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a transmission gear set, a horizontal sealing device, and a packaging machine. Background Technology

[0002] Pillow packaging machines are automatic packaging equipment that wrap products in film into a "pillow shape." They are suitable for high-speed packaging of regular-shaped items such as daily chemical products, food, and pharmaceuticals. Core functions include feeding, film wrapping, and heat sealing and cutting via a sealing device. The sealing device is a machine that seals the packaging film filled with the packaged goods. After sealing, the product is preserved in an airtight container, maintaining product quality and preventing air leakage. It is widely used in the packaging of daily chemical products, food, and pharmaceuticals.

[0003] Currently, there are two main types of sealing devices for pillow packaging machines: longitudinal sealing devices and transverse sealing devices. In existing technology, transverse sealing devices generally use a pair of upper and lower sealing devices for heating, and cutting is performed at the same time as sealing.

[0004] Patent No. 201910961128.7 discloses a sealing device, including an upper sealer and a lower sealer. The upper sealer is fixed to an upper horizontal arm, and the lower sealer is fixed to a lower horizontal arm. Both the upper and lower horizontal arms include a parallelogram double-crank mechanism composed of two cranks and a parallel connecting rod. The driving device includes four drive shafts connected to the four cranks and two meshing transmission gears. One of the drive shafts is connected to a drive motor as the active shaft. The two drive shafts of the upper horizontal arm are linked by a synchronous belt, and the two drive shafts of the lower horizontal arm are also linked by a synchronous belt. The driving device drives the upper and lower sealers to move synchronously.

[0005] In this sealing device, power is transmitted through the meshing of two gears. However, this transmission mechanism has the following shortcomings: 1. A separate backlash-free gear is required. 2. For packaging with taller contents, a large-diameter gear is needed to meet the transmission requirements, but large gears require a significant amount of space. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide a transmission gear set that occupies less space, can ensure transmission effect, can effectively eliminate gear backlash, and meet transmission requirements. At the same time, it also provides a horizontal sealing device using the transmission gear set and a packaging machine using the horizontal sealing device.

[0007] To solve the above-mentioned technical problems, the basic concept of the first technical solution adopted by this utility model is as follows:

[0008] A transmission gear set includes a first gear and a second gear, with a first intermediate gear and a second intermediate gear disposed between the first gear and the second gear. The first gear, the first intermediate gear, the second intermediate gear, and the second gear mesh sequentially. The first gear and the second gear are respectively connected to a first drive shaft and a second drive shaft. The first intermediate gear and the second intermediate gear are respectively connected to a first gear shaft and a second gear shaft. The line connecting the axes of the first intermediate gear and the second intermediate gear has an included angle θ with the line connecting the axes of the first gear and the second gear. Adjusting the included angle θ eliminates gear backlash.

[0009] Furthermore, it also includes a drive gear, which meshes with the first gear and is connected to the output shaft of the drive motor.

[0010] Furthermore, the first gear, the first intermediate gear, the second intermediate gear, and the second gear have the same diameter and number of teeth, and the meshing point of the first intermediate gear and the second intermediate gear coincides with the center point of the line connecting the axes of the first gear and the second gear.

[0011] Furthermore, the first gear shaft and the second gear shaft connected to the first intermediate gear and the second intermediate gear are mounted on the frame by a mounting assembly, which is configured to adjust the angle θ between the line connecting the axes of the first intermediate gear and the second intermediate gear and the line connecting the axes of the first gear and the second gear.

[0012] Furthermore, the mounting assembly includes a mounting plate with a central rotating shaft extending from its center. The central rotating shaft is rotatably connected to the frame. The mounting plate has two shaft holes, and the first gear shaft and the second gear shaft are fixedly connected to the two shaft holes respectively. The mounting plate has multiple arc-shaped mounting holes distributed on a circumference centered on the axis of the central rotating shaft. The arc-shaped mounting holes are fixedly connected to the frame by fasteners.

[0013] Furthermore, the mounting plate is composed of a first mounting plate and a second mounting plate. The first mounting plate is rectangular and the second mounting plate is rhomboid. The first mounting plate is provided with two arc-shaped mounting holes and a central rotating shaft. The two ends of the length of the second mounting plate are respectively provided with shaft holes. The two ends of the width of the second mounting plate are fixedly connected to the first mounting plate by fasteners.

[0014] Furthermore, the first gear shaft and the second gear shaft are clearance-fitted with their corresponding shaft holes, and an adjustment mechanism is provided on the mounting plate for adjusting the eccentric distance between the axis of the gear shaft and the axis of the shaft hole.

[0015] Furthermore, the adjustment mechanism includes two adjustment screw holes disposed on the side of the mounting plate, the two adjustment screw holes being respectively disposed corresponding to the two shaft holes. An adjustment bolt is installed in the adjustment screw hole. After the adjustment bolt is inserted into the adjustment screw hole, it presses against the first gear shaft or the second gear shaft from the side. Tightening the adjustment bolt pushes the first gear shaft and the second gear shaft from the side until the gear backlash is eliminated.

[0016] The basic concept of the second technical solution adopted in this utility model is:

[0017] A horizontal sealing device includes an upper sealer and a lower sealer. The upper sealer and the lower sealer are respectively equipped with transmission gear sets as described above on both sides. The transmission gear sets are connected to a drive motor. The lower sealer and the upper sealer are respectively connected to a first drive shaft and a second drive shaft through a drive mechanism.

[0018] The basic concept of the third technical solution adopted in this utility model is:

[0019] A packaging machine, comprising the horizontal sealing device as described above.

[0020] In summary, the transmission gear set, horizontal sealing device, and packaging machine provided by this utility model have the following advantages compared with the prior art:

[0021] (1) This utility model installs a first intermediate gear and a second intermediate gear between the first gear and the second gear. By adjusting the angle θ between the line connecting the axes of the first intermediate gear and the second intermediate gear and the line connecting the axes of the first gear and the second gear during installation, the backlash between the gears can be eliminated. Not only is the overall structure simple and the operation convenient and quick, but it can also achieve precise adjustment, ensuring the transmission accuracy and transmission performance of the gear set and meeting the transmission requirements.

[0022] (2) By installing the first intermediate gear and the second intermediate gear between the first gear and the second gear, the axial distance between the first gear and the second gear is increased accordingly, thereby increasing the relative movement distance between the upper sealer and the lower sealer. Without increasing or even decreasing the diameter of the first gear and the second gear, it can be used for packaging with taller packaging, such as five-pack instant noodle packaging bags, which can greatly reduce the space occupied by the gear set, thereby helping to reduce the space occupied by the horizontal sealing device.

[0023] (3) The horizontal sealing device provided by this utility model drives the lower sealer and the upper sealer to move simultaneously through two sets of driving transmission mechanisms on the left and right sides. This ensures that even if the sealing size of the lower sealer and the upper sealer is increased, the stability of their movement can still be guaranteed, making the horizontal sealing device suitable for packaging materials with larger dimensions.

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the horizontal sealing device of this utility model (with the frame removed);

[0028] Figure 2 yes Figure 1 The main view;

[0029] Figure 3 yes Figure 2 AA section view;

[0030] Figure 4 This is a schematic diagram of the structure of the first intermediate gear, the second intermediate gear, and the mounting assembly of this utility model;

[0031] Figure 5 yes Figure 4 Side view;

[0032] Figure 6 yes Figure 1 A magnified view of part of I;

[0033] Figure 7 yes Figure 2 Partial structural cross-sectional view of section II.

[0034] In the picture:

[0035] Upper sealer 1, lower sealer 2, first gear 3, second gear 4, first intermediate gear 5, second intermediate gear 6, first drive shaft 7, second drive shaft 8, first drive mechanism 9, crank 91, drive arm 92, driven drive shaft 93, synchronous pulley 94, synchronous belt 95, second drive mechanism 10, crank 101, drive arm 102, driven drive shaft 103, synchronous pulley 104, synchronous belt 105, first gear shaft 11, second gear shaft 12, drive motor 13, driving gear 14, mounting assembly 15, central rotating shaft 151, shaft hole 152, Arc-shaped mounting hole 153, First mounting plate 154, Second mounting plate 155, Bolt 156, Adjustment mechanism 157, Mounting hole 158, Frame 16, Cutter 17, Cutter holder 18, Feeding conveyor belt 19, Discharge conveyor belt 20, Transmission rod 21, Synchronization mechanism 22, Guide rod 221, Self-lubricating guide sleeve 222, Connecting seat 223, Cutter guide rod 23, Cutter spring 24, Limiting rod 25, Sealer guide assembly 26, Sealer guide sleeve 261, Sealer compression spring 262, Guide column 263, Adjusting nut 264.

[0036] It should be noted that the accompanying drawings and text description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0038] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0040] Example 1:

[0041] like Figures 1 to 7 As shown, this utility model provides a transmission gear set, which is applied to the horizontal sealing device of a packaging machine. The transmission gear set is used to drive the upper sealer 1 and the lower sealer 2 of the horizontal sealing device to move synchronously, so as to realize the sealing and cutting of the packaging film.

[0042] In this embodiment, the transmission gear set includes a first gear 3 and a second gear 4. A first intermediate gear 5 and a second intermediate gear 6 are disposed between the first gear 3 and the second gear 4. The first gear 3, the first intermediate gear 5, the second intermediate gear 6 and the second gear 4 mesh in sequence and are arranged from bottom to top.

[0043] In this embodiment, the first gear 3 and the second gear 4 are respectively connected to the first drive shaft 7 and the second drive shaft 8. The first drive shaft 7 is connected to the lower sealing device 2 through the first drive mechanism 9, and the second drive shaft 8 is connected to the upper sealing device 1 through the second drive mechanism 10. The first intermediate gear 5 and the second intermediate gear 6 are respectively connected to the first gear shaft 11 and the second gear shaft 12. Preferably, in this embodiment, the first intermediate gear 5 and the second intermediate gear 6 are rotatably connected to the first gear shaft 11 and the second gear shaft 12, and the first intermediate gear 5 and the second intermediate gear are respectively connected to the first gear shaft 11 and the second gear shaft 12 through bearings.

[0044] In this embodiment, the line connecting the axes of the first intermediate gear 5 and the second intermediate gear 6 has an included angle θ with the line connecting the axes of the first gear 3 and the second gear 4. The angle θ can be between 0 and 15°, meaning that the line connecting the axes of the first intermediate gear 5 and the second intermediate gear 6 does not completely coincide with the line connecting the axes of the first gear 3 and the second gear 4. During installation, the backlash of the gears at the meshing point of the first gear 3 and the first intermediate gear 5, and at the meshing point of the second intermediate gear 6 and the second gear 4 can be eliminated by adjusting the included angle θ, thereby meeting the requirement of eliminating backlash in gear meshing, improving the transmission accuracy of the transmission gear set, and improving the transmission performance.

[0045] The transmission gear set can connect the bottommost first gear 3 as a power gear to the drive motor 13. In this embodiment, it is further preferred that a driving gear 14 is provided below the first gear 3. The first gear 3 meshes with the driving gear 14, and the driving gear 14 is connected to the output shaft of the drive motor 13. When the output shaft of the drive motor 13 rotates in both directions, it drives the driving gear 14 to rotate in both directions. The driving gear 14 then drives the first gear 3 to rotate. The first gear 3 then drives the second gear 4 to rotate synchronously through the first intermediate gear 5 and the second intermediate gear 6. The first gear 3 and the second gear 4 rotate at the same speed but in opposite directions. Then, through the first drive mechanism 9 and the second drive mechanism 10, they drive the lower sealing device 2 and the upper sealing device 1 to perform closing or opening movements.

[0046] This embodiment achieves backlash elimination by installing a first intermediate gear 5 and a second intermediate gear 6 between the first gear 3 and the second gear 4 and adjusting the included angle θ. This not only simplifies the overall structure and makes operation convenient and quick, but also allows for precise adjustment, ensuring the transmission accuracy and performance of the gear set and meeting transmission requirements. Furthermore, by increasing the center distance between the first gear 3 and the second gear 4, taller packages, such as five-pack instant noodles, can be packaged without increasing or even decreasing the diameter of the first gear 3 and the second gear 4. This significantly reduces the space occupied by the gear set, thereby reducing the space occupied by the horizontal sealing device.

[0047] In this embodiment, it is further preferred that the diameter and number of teeth of the first gear 3, the second gear 4, the first intermediate gear 5, and the second intermediate gear 6 are all the same, and the meshing point of the first intermediate gear 5 and the second intermediate gear 6 coincides with the center point of the line connecting the axes of the first gear 3 and the second gear 4. This can achieve a stable transmission with a transmission ratio of 1:1 while ensuring the elimination of backlash.

[0048] To facilitate adjustment of the included angle θ between the axes of the first intermediate gear 5 and the second intermediate gear 6, and to achieve backlash elimination adjustment, in this embodiment, it is further preferred that the first gear shaft 11 and the second gear shaft 12, which are connected to the first intermediate gear 5 and the second intermediate gear 6, are mounted on the frame 16 via a mounting assembly 15. The mounting assembly 15 is configured to rotate relative to the frame 16, thereby adjusting the included angle θ between the axis of the first intermediate gear 5 and the second intermediate gear 6 and the axis of the first gear 3 and the second gear 4.

[0049] In this embodiment, more preferably, the mounting assembly 15 includes a mounting plate (not shown in the figure), with a central rotating shaft 151 extending from the rotation center of the mounting plate. The central rotating shaft 151 is rotatably connected to the frame 16. Two shaft holes 152 are provided on the mounting plate, and the first gear shaft 11 and the second gear shaft 12 are correspondingly and fixedly connected to the two shaft holes 152. There is no relative rotation between the first gear shaft 11, the second gear shaft 12, and the mounting plate. The mounting plate has multiple arc-shaped mounting holes 153 distributed on a circumference centered on the axis of the central rotating shaft 151. The arc-shaped mounting holes 153 are fixedly connected to the frame 16 by fasteners. Rotating the mounting plate around the central rotating shaft 151 adjusts the included angle θ, and the mounting plate (i.e., the first intermediate gear 5 and the second intermediate gear 6) is fixed in the adjusted position by fasteners.

[0050] The mounting plate can be a single piece; however, for ease of installation, it is preferred in this embodiment to be a split structure. The mounting plate includes a first mounting plate 154 and a second mounting plate 155. The first mounting plate 154 is preferably rectangular and generally horizontally oriented, while the second mounting plate 155 is preferably rhomboid. Two arc-shaped mounting holes 153 are provided on the first mounting plate 154 at both ends along its length. A central rotating shaft 151 extends to one side from the rotation center of the first mounting plate 154. A shaft hole 152 is provided at each end of the length of the second mounting plate 155 (i.e., the upper and lower ends of the second mounting plate 155). Four sets of mounting holes 158 are provided at both ends of the width of the second mounting plate 155 and on the first mounting plate 154. The first mounting plate 154 and the second mounting plate 155 are fixedly connected together by four bolts (not shown in the figure), which are arranged around the central rotating shaft 151 and between the two arc-shaped mounting holes 153.

[0051] During installation, firstly, assemble and fix the first gear shaft 11 and second gear shaft 12, which are already installed with the first intermediate gear 5 and the second intermediate gear 6, together with the two shaft holes 152 on the second mounting plate 155. Then, fix the second mounting plate 155 and the first mounting plate 154 together with four bolts. Finally, assemble the central rotating shaft 151 together with the frame 16. Rotating the first mounting plate 154 and the second mounting plate 155 can adjust the included angle θ. After adjustment, fix it to the frame 16 with two bolts 156 (the two bolts 156 slide in the two arc-shaped mounting holes 153 respectively). Fix the first mounting plate 154 and the second mounting plate 155 at any angle position to ensure the backlash elimination effect after adjustment. The arc-shaped mounting holes 153 are fan-shaped, and their length can be used to control the maximum clockwise and counterclockwise rotation angle of the angle adjustment. The length should not be too long, only enough to meet the backlash elimination requirements.

[0052] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, it is further preferred that the first gear shaft 11 and the second gear shaft 12 have a clearance fit with the corresponding shaft holes 152. An adjustment mechanism 157 is provided on the second mounting plate 155 to adjust the eccentricity between the axis of the first gear shaft 11 and the axis of the corresponding shaft hole 152. Thus, after the first mounting plate 154 and the second mounting plate 155 are adjusted to their positions as described above, the operator can further use the adjustment mechanism 157 to push the first gear shaft 11 and the second gear shaft 12, that is, to further fine-tune the included angle θ. The operator can observe and completely eliminate the gear backlash, achieving a good backlash elimination effect.

[0053] In this embodiment, more preferably, the adjustment mechanism 157 includes two adjustment screw holes (not shown in the figure) disposed on the sides of both ends of the second mounting plate 155. The two adjustment screw holes are respectively disposed corresponding to two shaft holes 152. Adjusting bolts are installed in the adjustment screw holes. After the adjusting bolts are inserted into the adjustment screw holes, they press against the first gear shaft 11 or the second gear shaft 12 in the shaft hole 152 from the side. Turning the adjusting bolts pushes the first gear shaft 11 or the second gear shaft 12 in the shaft hole 152 from the side, thereby adjusting the eccentric distance between the axis of the first gear shaft 11 and the second gear shaft 12 and the axis of the corresponding shaft hole 152. Furthermore, based on rotating the mounting plate, the included angle θ can be further finely adjusted until the gear backlash is eliminated. Preferably, the shaft hole 152 is a shaft hole with a straight section in the middle.

[0054] The above solution has the following beneficial effects:

[0055] The transmission gear set has a first intermediate gear 5 and a second intermediate gear 6 installed between the first gear 3 and the second gear 4. By adjusting the angle θ between the line connecting the axes of the first intermediate gear 5 and the second intermediate gear 6 and the line connecting the axes of the first gear 3 and the second gear 4 during installation, the backlash between the gears can be eliminated. The overall structure is simple and the operation is convenient and quick. It can also achieve precise adjustment, ensuring the transmission accuracy and transmission performance of the gear set and meeting the transmission requirements.

[0056] This transmission gear set, by installing a first intermediate gear 5 and a second intermediate gear 6 between the first gear 3 and the second gear 4, also increases the axial distance between the first gear 3 and the second gear 4, thereby increasing the relative movement distance between the upper sealer 1 and the lower sealer 2. Without increasing or even decreasing the diameter of the first gear 3 and the second gear 4, it can complete the packaging of taller items, such as five-pack instant noodle bags, which can greatly reduce the space occupied by the gear set, and thus help reduce the space occupied by the horizontal sealing device.

[0057] This transmission gear set, through the setting of mounting components and adjustment mechanisms, can achieve quick and precise adjustment and fixation of the relative mounting positions of the first intermediate gear 5 and the second intermediate gear 6 relative to the first gear 3 and the second gear 4, which can not only improve assembly efficiency, but also improve assembly accuracy.

[0058] Example 2:

[0059] like Figures 1 to 7As shown, this embodiment provides a horizontal sealing device, including an upper sealer 1 and a lower sealer 2. The upper sealer 1 and the lower sealer 2 are respectively equipped with transmission gear sets as provided in Embodiment 1 on both sides. At least one of the transmission gear sets is connected to a drive motor 13. The drive motor 13 drives the upper sealer 1 and the lower sealer 2 to move synchronously through the transmission gear set, so as to realize the sealing and cutting of the packaging bag.

[0060] In this embodiment, the horizontal sealing device includes a frame 16, on which a feeding conveyor belt 19 and a discharging conveyor belt 20 are also installed. An upper sealer 1 and a lower sealer 2 are installed between the feeding conveyor belt 19 and the discharging conveyor belt 20. The packaging film carrying the material is fed into the space between the upper sealer 1 and the lower sealer 2 by the feeding conveyor belt 19. After the upper sealer 1 and the lower sealer 2 complete the cutting and sealing, the material is sent out to the next station by the discharging conveyor belt 20. The feeding conveyor belt 19 and the discharging conveyor belt 20 are driven by belt drive mechanisms (not shown in the figure), so that the feeding conveyor belt 19 and the discharging conveyor belt 20 always run in the direction of travel of the packaging machine.

[0061] The upper sealer 1 and the lower sealer 2 are driven by a drive transmission mechanism to perform compound movements in the directions of approaching, moving away from, and back and forth, thereby achieving the sealing and cutting actions of the material. The feeding conveyor belt 19 and the discharging conveyor belt 20 reciprocate along with the upper sealer 1 and the lower sealer 2 while they are running.

[0062] In this embodiment, the drive transmission mechanism includes two sets of transmission mechanisms. Both sets of transmission mechanisms adopt the transmission gear sets described in Embodiment 1, and are installed on both sides of the upper sealer 1 and the lower sealer 2. Below the first gear 3 in each of the two sets of transmission gear sets, a drive gear 14 is respectively provided. The first gear 3 meshes with the corresponding drive gear 14. One of the drive gears 14 (i.e....) Figure 1 The drive gear 14 located on the left is connected to the output shaft of the drive motor 13, which is fixed on the frame 16. The two drive gears 14 on the left and right are connected by a transmission rod 21, and the drive motor 13 drives the transmission gear sets on both sides to move synchronously.

[0063] When the output shaft of the drive motor 13 rotates in both directions, it synchronously drives the drive gears 14 on the left and right sides to rotate in both directions. The two drive gears 14 then drive the corresponding first gear 3 to rotate. The first gear 3 then drives the second gear 4 to rotate synchronously through the first intermediate gear 5 and the second intermediate gear 6. The first gear 3 and the second gear 4 rotate at the same speed and in opposite directions. In turn, the two sets of first drive mechanisms 9 and the two sets of second drive mechanisms 10 drive the lower sealer 2 and the upper sealer 1 to perform closing or opening movements.

[0064] In this embodiment, by simultaneously driving the lower sealer 2 and the upper sealer 1 through two sets of left and right transmission mechanisms, two sets of first drive mechanisms 9 and two sets of second drive mechanisms 10, it can be ensured that even if the sealing size of the lower sealer 2 and the upper sealer 1 is increased, the stability of their movement can be guaranteed, so that the horizontal sealing device can be used for packaging materials with larger dimensions.

[0065] The two sets of first drive mechanisms 9 and the two sets of second drive mechanisms 10 have the same structure. The first drive mechanism 9 is a double-crank mechanism consisting of two parallel cranks 91 and a drive arm 92. One end of each crank 91 is rotatably connected to the drive arm 92 via a crankshaft (not shown in the figure). The other end of one crank 91 is connected to the first gear 3 via a first drive shaft 7, and the other end of the other crank 91 is connected to the synchronous pulley 94 via a driven drive shaft 93. The synchronous pulley 94 is connected to the first gear 3 via a synchronous belt 95. The second drive mechanism 10 is also a double-crank mechanism consisting of two parallel cranks 101 and a drive arm 102. One end of each crank 101 is rotatably connected to the drive arm 102 via a crankshaft. The other end of one crank 101 is connected to the second gear 4 via a second drive shaft 8, and the other end of the other crank 101 is connected to the synchronous pulley 104 via a driven drive shaft 103. The synchronous pulley 104 is connected to the second gear 4 via a synchronous belt 105.

[0066] The two ends of the upper sealing device 1 are connected to the drive arms 102 in the two sets of second drive mechanisms 10, and the two ends of the lower sealing device 2 are connected to the drive arms 92 in the two sets of first drive mechanisms 9. The drive arms 92 move in a circular motion with the crank 91, and the drive arms 102 move in a circular motion with the crank 101, thereby driving the upper sealing device 1 and the lower sealing device 2 to make a compound motion of approaching each other, moving away from each other, and moving back and forth in the horizontal direction. This allows the upper sealing device 1 and the lower sealing device 2 to move horizontally for a certain period of time while engaging, thereby effectively extending the contact time between the sealing device and the packaging film, increasing the heating time for sealing, and improving the sealing performance of the packaging bag.

[0067] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown in this embodiment, preferably, a set of synchronization mechanisms 22 are also installed at both ends of the upper sealer 1 and the lower sealer 2. The synchronization mechanisms 22 drive the feeding conveyor belt 19 and the discharging conveyor belt 20 to move laterally back and forth while running.

[0068] In this embodiment, it is further preferred that the two sets of synchronization mechanisms 22 have the same structure, and the synchronization mechanism 22 is set between the two cranks in the first drive mechanism 9 and the second drive mechanism 10. This can not only ensure synchronous movement, but also simplify the overall structure of the synchronization mechanism 22, thereby further reducing the overall volume of the horizontal sealing device and reducing the space occupied by the horizontal sealing device.

[0069] In this embodiment, more preferably, the synchronization mechanism 22 includes a guide rod 221 and a self-lubricating guide sleeve 222. The guide rod 221 is installed inside the self-lubricating guide sleeve 222, and the guide rod 221 and the self-lubricating guide sleeve 222 can slide relative to each other. The guide rod 221 is slidably installed on the upper sealing device 1, and the bottom of the guide rod 221 is fixedly connected to the lower sealing device 2. The self-lubricating guide sleeve 222 is fitted onto the guide rod 221 located between the upper sealing device 1 and the lower sealing device 2, and the self-lubricating guide sleeve 222 is fixed on the connecting seat 223. The feeding conveyor belt 19 and the discharging conveyor belt 20 are simultaneously connected to the connecting seat 223. When the drive arm 92 and drive arm 102 drive the upper sealer 1 and the lower sealer 2 to move, the guide rod 221 moves synchronously. Driven by the guide rod 221, and due to the restriction of the self-lubricating guide sleeve 222, the connecting seat 223 moves back and forth synchronously in the lateral direction. This drives the feeding conveyor belt 19 and the discharging conveyor belt 20 to follow the upper sealer 1 and the lower sealer 2 in the lateral back and forth reciprocating motion while running, and always keeps the distance between the feeding conveyor mechanism 19 and the discharging conveyor mechanism 20 unchanged.

[0070] In this embodiment, the feeding conveyor belt 19 and the discharging conveyor belt 20 are driven by their respective belt drive mechanisms to ensure that the belts move in the same direction and at the same speed as the packaging machine. At the same time, driven by the synchronization mechanism 22, they can also follow the sealing device 2 to make reciprocating linear motion in the horizontal direction. This not only meets the sealing time requirements of the sealing device, but also ensures the smooth movement of the feeding conveyor belt 19 and the discharging conveyor belt 20.

[0071] In this embodiment, two drive arms 102 in the two sets of second drive mechanisms 10 are respectively fixedly connected to a tool holder 18. A through hole (not shown in the figure) is opened on the tool holder 18, and the guide rod 221 passes through the through hole of the tool holder 18. The tool holder 18 is installed above the upper sealing device 1. One end of the tool holder 18 is fixed to the drive arm 102 by screws. When the drive arm moves, it drives the tool holder 18 to move. Due to the limitation of the tool holder 18, it also moves synchronously with the guide rod 221.

[0072] In this embodiment, a cutting guide rod 23 is installed below the other end of the knife holder 18. The cutting guide rod 23 passes through the upper sealing device 1, and the cutting guide rod 23 and the upper sealing device 1 can slide relative to each other. The cutting knife 17, which is embedded in the upper sealing device 1, is fixedly connected to the cutting guide rods 23 on both sides.

[0073] A limiting rod 25 extends to one side from the top of the cutter guide rod 23. A cutter spring 24 is also fitted on the top of the cutter guide rod 23. The cutter spring 24 is positioned above the upper sealing device 1. The limiting rod 25 is positioned above the cutter spring 24. The limiting rod 25 can be one, two symmetrically arranged, or a ring structure.

[0074] As the drive arm 102 moves in a circular motion, the knife holder 18 also moves in a circular motion. When the drive arm 102 moves downward to engage the upper sealer 1 and the lower sealer 2 to seal, the knife holder 18 continues to move downward, thereby driving the cutter guide rod 23 downward, causing the cutter 17 to extend to the cutting height position. At this time, the cutter spring 24 is compressed under the action of the limit rod 25. After passing the cutting position, under the reset action of the cutter spring 24, the cutter spring 24 pushes the limit rod 25 upward, thereby driving the cutter guide rod 23 and the cutter 17 upward to the initial height position. By setting the knife holder 18 and the cutter spring 24 so that the cutter 17 extends and retracts with the movement of the upper sealer 1 and the lower sealer 2, no additional drive device is required, making the structure simpler and the operation more convenient and reliable. In addition, in this embodiment, the knife holder 18 that drives the movement of the cutter 17 is also installed between the two cranks, which also helps to reduce the overall volume of the horizontal sealing device and simplify its structure.

[0075] like Figure 1 and Figure 7 As shown, in this embodiment, sealing device guide assemblies 26 are respectively installed at both ends of the upper sealing device 1 and the lower sealing device 2. The sealing device guide assembly 26 includes a sealing device guide sleeve 261, a sealing device compression spring 262, and a guide post 263. Taking the upper sealing device 1 as an example, the bottom end of the guide post 263 is fixed on the upper sealing device 1, and the guide post 263 passes through the corresponding drive arm 102. The sealing device compression spring 262 is installed above the top of the guide post 263. The sealing device guide sleeve 261 is a cylindrical structure with a top sealing, which is fitted on the outside of the sealing device compression spring 262 and the guide post 263. An adjusting nut 264 for adjusting the engagement time of the upper sealing device 1 is provided on the top of the guide post 263. The initial contraction of the sealing spring 262 is adjusted by adjusting the nut 264, which adjusts the distance between the sealing device and the corresponding drive arm, thereby adjusting the engagement time of the upper sealing device 1 and the lower sealing device 2 to adapt to the contact time between the upper sealing device 1 and the lower sealing device 2 and the packaging film required by different processes.

[0076] When the upper and lower drive arms approach each other, the upper sealer 1 and the lower sealer 2 engage with each other. When the drive arms 92 and 102 approach each other further, the guide posts 263 on the upper sealer 1 and the lower sealer 2 slide relative to the sealer guide sleeves 261 at the ends of the corresponding drive arms. The sealer compression springs 262 keep the upper sealer 1 and the lower sealer 2 engaged during the sliding process, thereby extending the contact time between the upper sealer 1 and the lower sealer 2 and the film, and effectively improving the reliability of the packaging bag sealing. Simultaneously, as the upper and lower drive arms move closer together and the sealing spring 262 is compressed, the blade holders 18 on both sides move further downward, pushing the cutter guide rod 23. The cutter guide rod 23 compresses the cutter spring 24, which in turn drives the lower cutter 17 downward, extending it out of the upper sealing device 1 to complete the cutting action. This allows the packaging film to cut the sealed packaging bag apart during the closing process of the upper sealing device 1 and the lower sealing device 2. The cutter 17 retracts under the action of the cutter spring 24, further cutting the sealed packaging bag apart during the closing process of the upper sealing device 1 and the lower sealing device 2.

[0077] The horizontal sealing device provided by this utility model has a reasonable structural design, which can not only ensure packaging quality and sealing effect and greatly improve packaging efficiency, but also help to reduce the overall volume of the horizontal sealing device and reduce the space occupied by the horizontal sealing device.

[0078] Example 3:

[0079] This embodiment provides a packaging machine, including a material conveyor, a feeding conveyor belt, a discharging conveyor belt, a longitudinal sealing device, and a transverse sealing device. The material to be packaged is placed on the material conveyor. The longitudinal sealing device and the transverse sealing device are arranged back and forth along the running direction of the feeding conveyor belt and the discharging conveyor belt. The material in the packaging bag first reaches the longitudinal sealing device to complete the longitudinal sealing of the packaging bag, and then moves further to the position of the transverse sealing device to complete the transverse sealing and cutting.

[0080] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A transmission gear set, characterized in that: The device includes a first gear and a second gear, with a first intermediate gear and a second intermediate gear disposed between the first gear and the second gear. The first gear, the first intermediate gear, the second intermediate gear, and the second gear mesh sequentially. The first gear and the second gear are respectively connected to a first drive shaft and a second drive shaft. The first intermediate gear and the second intermediate gear are respectively connected to a first gear shaft and a second gear shaft. The line connecting the axes of the first intermediate gear and the second intermediate gear has an included angle θ with the line connecting the axes of the first gear and the second gear. Adjusting the included angle θ eliminates gear backlash.

2. The transmission gear set according to claim 1, characterized in that: It also includes a drive gear, the first gear meshes with the drive gear, and the drive gear is connected to the output shaft of the drive motor.

3. The transmission gear set according to claim 1, characterized in that: The first gear, the first intermediate gear, the second intermediate gear, and the second gear have the same diameter and number of teeth. The meshing point of the first intermediate gear and the second intermediate gear coincides with the center point of the line connecting the axes of the first gear and the second gear.

4. The transmission gear set according to any one of claims 1-3, characterized in that: The first gear shaft and the second gear shaft, which are connected to the first intermediate gear and the second intermediate gear, are mounted on the frame by a mounting assembly. The mounting assembly is configured to adjust the angle θ between the line connecting the axes of the first intermediate gear and the second intermediate gear and the line connecting the axes of the first gear and the second gear.

5. The transmission gear set according to claim 4, characterized in that: The mounting assembly includes a mounting plate with a central rotating shaft extending from its center. The central rotating shaft is rotatably connected to the frame. The mounting plate has two shaft holes, and the first gear shaft and the second gear shaft are fixedly connected to the two shaft holes respectively. The mounting plate has multiple arc-shaped mounting holes distributed on a circumference centered on the axis of the central rotating shaft. The arc-shaped mounting holes are fixedly connected to the frame by fasteners.

6. The transmission gear set according to claim 5, characterized in that: The mounting plate consists of a first mounting plate and a second mounting plate. The first mounting plate is rectangular and the second mounting plate is rhomboid. The first mounting plate is provided with two arc-shaped mounting holes and a central rotating shaft. The two ends of the length of the second mounting plate are respectively provided with shaft holes. The two ends of the width of the second mounting plate are fixedly connected to the first mounting plate by fasteners.

7. The transmission gear set according to claim 5, characterized in that: The first gear shaft and the second gear shaft are clearance-fitted with their corresponding shaft holes, and an adjustment mechanism is provided on the mounting plate for adjusting the eccentric distance between the axis of the gear shaft and the axis of the shaft hole.

8. The transmission gear set according to claim 7, characterized in that: The adjustment mechanism includes two adjustment screw holes on the side of the mounting plate, which correspond to the two shaft holes respectively. An adjustment bolt is installed in the adjustment screw hole. After the adjustment bolt is inserted into the adjustment screw hole, it presses against the first gear shaft or the second gear shaft from the side. Tightening the adjustment bolt pushes the first gear shaft and the second gear shaft from the side until the gear backlash is eliminated.

9. A horizontal sealing device, comprising an upper sealer and a lower sealer, characterized in that: The upper and lower sealing devices are respectively equipped with transmission gear sets as described in any one of claims 1-8 on both sides, the transmission gear sets are connected to the drive motor, and the lower and upper sealing devices are respectively connected to the first drive shaft and the second drive shaft through the drive mechanism.

10. A packaging machine, characterized in that: Includes the horizontal sealing device as described in claim 9.

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