Automatic tensioning device for conveying belt of G.D.S1000-BV packaging machine

Abstract

The utility model discloses an automatic tensioning device for a G.D.S1000-BV packing machine conveyer belt, which comprises a first tensioning device piece, a second tensioning device piece and a master control device, the first tensioning device piece comprises a floating support, a tensioning spring, a mounting seat and a controller, the front end of the floating support is provided with a tensioning roller, the side edge of the floating support is provided with a rotary encoder, and the controller is connected with the tensioning roller. The electric push rod is connected with the mounting base through the tensioning spring and is embedded in the floating support, and the controller is fixedly connected to the tail end of the mounting base; the second tensioning device and the first tensioning device are completely identical in structure and are arranged in a mirror symmetry mode. The master control device is connected with the first tensioning device and the second tensioning device through data lines. According to the device, the integrated structural design is adopted, transmission connection is achieved through the data line, the installation process is convenient and fast, the tensioning degree of the conveying belt is maintained through the reset characteristic of the tensioning spring, the speed difference is eliminated through electric accurate control, and the problems that due to insufficient tensioning or speed difference of the conveying belt, cigarette packets move backwards, are dislocated and fall off are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of tobacco production equipment technology, and in particular to an automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine. Background Technology

[0002] The C800-BV packaging machine is for the small-pack transparent paper and carton packaging of the GDS1000 packaging unit. The specific process flow of the BV carton packaging machine is as follows: After the cigarette packs are arranged into 25-flat packs by the spiral stacker, the suction arm grabs the carton from the carton hopper and places it into the descending channel. During the descent, glue is applied, and the pusher pushes the carton into the channel for folding. The formed carton is then turned from wheel one to wheel two, while the pre-cut transparent paper moves with the carton and undergoes initial folding. The transparent paper reel is unwound and conveyed forward, where it is precisely cut by the cutting device. The transparent paper undergoes final folding and ironing as it moves with the carton. The packaged cartons are stacked, and the final finished cartons are conveyed to the next process or storage area.

[0003] In this process, the upper and lower conveyor belts clamp and transport the 25-pack cigarettes, arranged by the spiral stacker, into the next processing stage of carton packaging. Over time, the conveyor belts gradually loosen, causing slippage during cigarette pack transport. This leads to positional shifts in the double-layered cigarette packs during transport, affecting packaging quality and efficiency. Currently, the conveyor belt tension adjustment of the GDS1000-BV carton packaging machine is mostly manually controlled. This requires periodic manual adjustment or emergency shutdown for maintenance after observing shifts in the cigarette pack transport. This is not only time-consuming and labor-intensive but also cannot guarantee that the conveyor belt is always at an ideal tension.

[0004] In addition, the upper and lower conveyor belts of the GDS1000-BV carton packaging machine are controlled by separate motors, which can easily cause a speed difference between the two conveyor belts during operation. This can lead to displacement of the upper and lower cigarette packs in the flat packaging state, resulting in the cigarette packs shifting backward, misaligning, or falling off, which has a significant impact on the packaging quality and efficiency of the cigarette packs.

[0005] A search revealed that Chinese invention patent CN 114955400 A discloses a pneumatic tensioning device for a ZB45 packaging machine conveyor belt. The ZB45 packaging machine conveyor belt includes a tensioning roller, an upper belt, and a lower belt. The device also includes a protective frame, a cylinder, a floating support, a tensioning roller, a controller, and an alarm. The protective frame is mounted on the ZB45 packaging machine conveyor belt. The cylinder includes a cylinder barrel and a cylinder rod, with the cylinder barrel fixed to the protective frame. The floating support is connected to the cylinder rod via a connecting block. The tensioning roller is mounted on the floating support, and the upper or lower belt is wound around the tensioning roller. The floating support is equipped with a rotary encoder to measure the rotational speed of the tensioning roller. The cylinder is equipped with a pressure regulating valve. Both the rotary encoder and the alarm are electrically connected to the controller. Under pneumatic pressure, the cylinder rod automatically drives the tensioning roller to move, thus tensioning the upper or lower belt and maintaining a constant tension force. This achieves real-time automatic compensation during the conveyor belt tensioning process and timely acquisition of the speeds of the upper and lower belts, preventing the cigarette packs from collapsing. This invention patent has the following problems:

[0006] The alarm only sounds when the speed difference exceeds a certain value, requiring manual adjustment of the conveyor belt speed. However, workers cannot obtain information about the speed difference within a short period, and it takes time to eliminate the difference. During this period, the conveyor belt is prone to misalignment or dropping of 25-pack cigarette cartons, significantly impacting the quality and efficiency of subsequent carton packaging and making it difficult to control and guarantee packaging quality. Furthermore, this invention patent involves excessive additional control valves and requires manual intervention. Summary of the Invention

[0007] To address the numerous problems existing in the aforementioned background technology and achieve the aforementioned technical objectives, this utility model provides an automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine, which is implemented through the following design structure and the following technical solution:

[0008] As an automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine according to the present invention, it includes: a first tensioning device component, which is installed on the upper conveyor support of the packaging machine conveyor belt to control and adjust the tension of the upper conveyor belt.

[0009] The second tensioning device is installed on the lower conveyor support of the packaging machine conveyor belt to control and adjust the tension of the lower conveyor belt.

[0010] The master controller is connected to the first tensioning device and the second tensioning device via a data cable.

[0011] Furthermore, the first tensioning device includes: a floating bracket, a tensioning roller is detachably mounted on the front end of the floating bracket, and a rotary encoder is provided on one side of the floating bracket;

[0012] Mounting base, the mounting base is located in the middle of the first tensioning device, and an electric push rod connected to the floating bracket is installed inside the mounting base;

[0013] The controller is mounted at the rear end of the mounting base and is electrically connected to the rotary encoder and the electric push rod.

[0014] Furthermore, the floating support has a "U"-shaped structure, including a mounting hole, a circular hole I, a connecting protrusion, and a connecting plate. The mounting hole is a through hole, located on the side of the "U"-shaped groove, for mounting the tension roller and the rotary encoder. The circular hole I is located on the rear end face of the floating support, and a tension spring is installed inside the circular hole I. The connecting protrusion is located on both sides of the circular hole I, for connecting the push rod end of the electric push rod. The connecting plate is fixedly connected to one side of the floating support by bolts, and the connecting plate is provided with a slider that is slidably connected to the mounting base.

[0015] Furthermore, the mounting base includes a square groove, a fixing plate, a side plate, and a circular hole II. The square groove is located on the rear end face of the support. Two sets of symmetrical square through grooves are provided on the closed end face of the square groove. The electric push rod is installed in the square through groove. The fixing plate is fixedly connected to the side of the support and is bolted to the back plate of the packaging machine conveyor belt during use. The side plate is located on the other side of the mounting base and is bolted to the side plate of the conveyor bracket of the packaging machine conveyor belt. The circular hole II is located on the front end face of the support and is used to connect the tail end of the tension spring.

[0016] Furthermore, the mounting base also includes two linear slide grooves, which are disposed on the side end face of the mounting base for embedding and slidingly connecting the slider.

[0017] Furthermore, the controller includes a control block and a screen panel. The front end of the control block is provided with an "U"-shaped groove for mounting the motor end of the electric push rod. The rear end of the controller is provided with a connection hole for connecting to the main controller by inserting a data cable. The screen panel is located on the front side of the controller, and an indicator light is provided at the corner of the screen panel, which flashes different colors of light according to different data signals to serve as a reminder.

[0018] Furthermore, the back of the screen panel is provided with a support leg that is fastened to the mounting base, and the connecting plate is provided in the internal space area of ​​the support leg.

[0019] Furthermore, the second tensioning device includes a tensioning roller, a mounting base, and a controller. The second tensioning device has the same structure as the first tensioning device, and the second tensioning device is arranged in a mirror image symmetrical to the first tensioning device.

[0020] Furthermore, the controller includes a data cable, and the controller is bolted to the back plate of the packaging machine conveyor belt. The controller is connected to the first tensioning device and the second tensioning device respectively via two data cables.

[0021] The beneficial effects of this utility model compared with the prior art are:

[0022] 1. This utility model provides an automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine. The controller controls the electric push rod to drive the tensioning roller to move, thereby applying extrusion force to the conveyor belt, making the conveyor belt tensioned, and keeping the conveyor belt in a constant tension state during operation. This solves the production quality problem of misalignment of conveyed cigarette packs caused by insufficient conveyor belt tension, and realizes real-time automatic compensation in the conveyor belt tensioning process.

[0023] 2. The automatic tensioning device of this utility model has the function of independently adjusting the tension of the upper and lower conveyor belts. Two sets of rotary encoders in the device can respectively acquire the speed of the two conveyor belts and transmit the data to the corresponding controllers. The two controllers then transmit the data to the central control device, which processes the data and provides feedback. Based on the feedback results, the controller controls the electric push rod, causing it to drive the tensioning roller to make a slight displacement, thereby controlling and eliminating the speed difference between the two conveyor belts in real time. This effectively overcomes the problem of misalignment and detachment of cigarette packs when conveying 25-pack cigarettes due to the different speeds of the upper and lower conveyor belts. Furthermore, the controller can display various data on the screen panel. When an abnormal situation occurs, the controller can control the indicator lights to flash, thus reminding the staff to handle the situation promptly.

[0024] 3. The automatic tensioning device involved in this utility model features an integrated structural design, with data cables connecting the devices, making installation convenient and quick. This device can automatically control and adjust the tension of the upper and lower conveyor belts without requiring manual intervention. Attached Figure Description

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the overall structure of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the overall structure of the first tensioning device (1) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the overall structure of the first tensioning device (1) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model. Figure 2 ;

[0030] Figure 5 This is a top sectional view of the first tensioning component (1) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model;

[0031] Figure 6 This is an exploded view of the first tensioning component (1) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model. Figure 1 ;

[0032] Figure 7 This is an exploded view of the first tensioning component (1) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model. Figure 2 ;

[0033] Figure 8 This is a schematic diagram of the overall structure of the second tensioning device (2) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model;

[0034] Figure 9 This is a schematic diagram showing the installation positions of the first tensioning component (1) and the second tensioning component (2) of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine of this utility model.

[0035] Figure 10 This is a schematic diagram showing the operating status of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine according to this utility model;

[0036] Figure 11 This is a cross-sectional schematic diagram showing the operation of the automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine.

[0037] The numbers in the diagram are as follows:

[0038] 1-First tensioning device;

[0039] 2-Second tensioning device;

[0040] 3-Master control unit;

[0041] 4-Floating bracket; 41-Mounting hole; 42-Round hole I; 43-Connecting protrusion; 44-Connecting plate; 45-Slider;

[0042] 5-Pressure spring;

[0043] 6-Mounting base; 61-Square groove; 62-Fixing plate; 63-Side plate; 64-Round hole II; 65-Square tube groove; 66-Straight slide groove;

[0044] 7-Controller; 71-Control block; 72-Screen panel; 73-Connection hole; 74-Indicator light; 75-Standard leg;

[0045] 8-Tension roller; 9-Rotary encoder; 10-Electric push rod; 11-Data cable; 12-Packaging machine conveyor belt; 13-Cigarette pack. Detailed Implementation

[0046] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] The existing GDS1000-BV packaging machine's conveyor system consists of two symmetrical sets of conveyor belts, primarily including a drive pulley, tension pulleys, fixed rollers, and conveyor belts. The two tension pulleys are located below the drive pulley and tension the conveyor belt by squeezing it. Cigarette packs, arranged into 2 / 5 flat packages by a spiral stacker, are continuously conveyed into the carton packaging stage through the gap between the upper and lower conveyor belts. During prolonged operation, the conveyor belts gradually loosen, leading to slippage and misalignment of the cigarette packs. These problems can only be detected through worker observation, and subsequent adjustments require machine shutdown, which is time-consuming and labor-intensive, severely impacting the production efficiency and packaging quality of carton packaging.

[0048] In addition, as the conveyor belt gradually loosens, a speed difference can easily occur between the upper and lower conveyor belts. This speed difference can lead to uneven friction between the upper and lower tobacco packs, resulting in the tobacco packs shifting backward and misaligning, or the upper tobacco packs falling off.

[0049] In response to the above problems, such as Figures 1-2As shown, an automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine includes: a first tensioning device 1, which is installed on the upper conveyor support of the packaging machine conveyor belt 12 to control and adjust the tension of the upper conveyor belt.

[0050] The second tensioning device 2 is installed on the lower conveyor support of the packaging machine conveyor belt 12 to control and adjust the tension of the lower conveyor belt.

[0051] The main control device 3 is connected to the first tensioning device 1 and the second tensioning device 2 via a data cable 11. The main control device 3 is provided with multiple mounting holes around it and can be installed in the idle position of the packaging machine conveyor belt 12 by screws.

[0052] like Figures 3-5 As shown, the first tensioning device 1 includes: a floating bracket 4, a tensioning roller 8 is detachably mounted on the front end of the floating bracket 4 for attaching to and applying pressure to the packaging machine conveyor belt 12, and a rotary encoder 9 is provided on the left side of the floating bracket 4 by means of screws. The rotary encoder 9 is connected to the shaft of the tensioning roller 8 and is used to record the rotation speed of the tensioning roller 87 in real time.

[0053] A tension spring 5 is disposed between the floating bracket 4 and the mounting base 6, with its front end fixedly connected to the floating bracket 4 and its rear end fixedly connected to the mounting base 6. The reset characteristic of the tension spring 5 continuously applies pressure to the floating bracket 4, further pushing the tension roller 8 to apply pressure to the conveyor belt, thereby maintaining the stable tension of the conveyor belt.

[0054] Mounting base 6 is located in the middle of the first tensioning device 1 and is slidably connected to the floating bracket 4 via connecting plate 44 to ensure that the movement of the floating bracket 4 is always in a horizontal state. Two sets of electric push rods 10 are symmetrically arranged inside the mounting base 5 to push the floating bracket 4 to change displacement. The front end of the mounting base 6 is provided with a round hole II 64. One end of the tension spring 5 is fixedly connected inside the round hole II 64, and the other end of the tension spring 5 is fixedly connected in the round hole I 42 at the tail end of the floating bracket 4 to reduce the vibration of the floating bracket 4.

[0055] The controller 7 is fixedly installed at the rear end of the mounting base 5. The controller 7 has an integrated chip inside, which is electrically connected to and controls the rotary encoder 9 and the electric push rod 10.

[0056] like Figures 6-7As shown, the floating bracket 4 is specifically in a "C" - shaped structure. The side of the "C" - shaped structure is provided with mounting holes 41 in the form of through - holes for detachably mounting the tensioning roller 8. The rotary encoder 9 is arranged on the left side of the floating bracket 4, and its inner shaft passes through the mounting hole 41 and is embedded and installed with the shaft of the tensioning roller 8. On the rear end face of the floating bracket 4, connection bumps 43 in the shape of hexagonal nuts are symmetrically arranged for connecting the push - rod end head of the electric push - rod 10. A round hole I is arranged at the middle position between the two groups of connection bumps 43 for connecting the tension spring 5. The right side of the floating bracket 4 is fixedly connected with a connecting plate 44 by screws. The connecting plate 44 is in a long - strip shape, and sliders 45 are arranged on the inner wall of the part extending out of the floating bracket 4 to ensure the horizontal movement of the floating bracket 4.

[0057] On the rear end face of the mounting seat 6, a square groove 61 is opened. On the left and right sides of the inner wall of the square groove 61, two groups of square through - grooves 65 are symmetrically opened, and the inside of the square through - grooves 65 is used for installing the tail of the push - rod of the electric push - rod 10. On the front end face of the mounting seat 6, a round hole II 64 is opened for connecting the tension spring 5. On the left side of the mounting seat 6, a fixing plate 62 is fixedly arranged. The fixing plate 62 extends forward to a position flush with the rotary encoder 9. There are threaded holes on the back of the fixing plate 62 for installing the tensioning device during use. A linear sliding groove 66 is opened on the right side of the fixing plate 62 for connecting the slider 45. Below the linear sliding groove 66, a side plate 63 is arranged. The side plate 63 is in contact and connected with the side plate of the conveying bracket of the packaging machine conveyor belt 12. Installation holes are opened on the side plate 63 for side - mounting and stabilizing the tensioning device.

[0058] The controller 7 includes a control block 71 and a screen panel 72. The control block 71 is in a long - strip shape, and a "C" - shaped groove is opened at the front end for placing the motor end of the electric push - rod 10. A connection hole 73 is arranged on the left end face of the control block 71, and it can be connected to the main controller 3 by inserting a data cable 11. A screen panel 72 is arranged on the right end face of the control block 71. The screen panel 72 extends forward to be flush with the front end face of the mounting seat 6. A support leg 75 is arranged on the back of the flush position for being buckled into the buckling hole of the mounting seat 6 after combined installation to maintain a stable state. An indicator light 74 is arranged at the upper right corner of the screen panel 72, which can flash different - colored lights according to different received signals to play a reminder role.

[0059] As Figure 8 shown, the second tensioning device 2 includes a floating bracket 4, a tension spring 5, a mounting seat 6, a controller 7, a tensioning roller 8, a rotary encoder 9 and an electric push - rod 10. The structure of the second tensioning device 2 is exactly the same as that of the first tensioning device 1. During use, the first tensioning device 1 is used for installing and controlling the upper conveyor belt of the packaging machine conveyor belt 12, and the second tensioning device 2 is used for installing and controlling the lower conveyor belt of the packaging machine conveyor belt 12. The two are arranged symmetrically in a mirror image.

[0060] AsFigures 9-11 As shown, during use, the first tensioning device 1 is placed above the belt corner of the conveyor belt on the GDS1000-BV packaging machine. Then, the position of the first tensioning device 1 is adjusted so that the tensioning roller 8 at the front end is close to the conveyor belt and exerts a squeezing effect. Utilizing the reset characteristic of the tension spring 5, the tensioning roller 8 continuously presses the conveyor belt, ensuring the conveyor belt remains at its optimal tension. Then, bolts are passed through the bolt holes on the fixing plate 62 and the side plate 63 to securely install the first tensioning device 1 onto the upper conveyor bracket of the packaging machine's conveyor belt 12. Following the same procedure, the second tensioning device 2 is installed below the belt corner of the lower conveyor belt on the GDS1000-BV packaging machine. Next, the main control device 3 is installed in the unused space of the packaging machine conveyor belt 12 near the first tensioning device 1 using bolts. Then, data cables 11 are used to connect the first tensioning device 1, the second tensioning device 2, and the main control device 3, respectively, to achieve signal transmission and coordinated operation between the components, ensuring that the entire system can effectively perform its tensioning and control functions during the operation of the packaging machine. The motor is started, and the packaging machine conveyor belt 12 rotates accordingly, driving the tensioning roller 8 to begin rotating. The rotary encoder 9 at the end records the rotational speed of the tensioning roller 8 and transmits the data to the controller 7. The controller 7 transmits the data to the main control device 3 via data cable 11 and also transmits the data in text form to the screen panel 73 for display. After receiving the two sets of data from the first tensioning device 1 and the second tensioning device 2, the main control device 3 automatically analyzes and processes these two sets of data, and then feeds the results back to the controllers 7 of the first tensioning device 1 and the second tensioning device 2. Based on feedback, the controller 7 of either the first tensioning device 1 or the second tensioning device 2 manipulates the electric push rod 10 to push forward or pull backward the floating bracket 4, thereby controlling the tension roller 8 to move closer to or further away from the packaging machine conveyor belt 12. This achieves control and adjustment of the speed of the packaging machine conveyor belt 12, ensuring that the speeds of the upper and lower conveyor belts of the packaging machine 12 are consistent. In this way, quality problems such as misalignment and drop of cigarette packs caused by differences in conveyor belt speeds can be effectively solved during the cigarette production and packaging process.

[0061] Finally, it should be noted that the concept, specific structure, and technical effects of this utility model have been clearly and completely described above in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, the connection relationship mentioned herein does not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

Claims

1. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine, characterized in that, Comprising: A first tensioning device (1), which is installed on the upper conveying bracket of the packaging machine conveyor belt (12) to control and adjust the tension of the upper conveying belt; A second tensioning device (2), which is installed on the lower conveying bracket of the packaging machine conveyor belt (12) to control and adjust the tension of the lower conveying belt; A master control device (3), which is connected to the first tensioning device (1) and the second tensioning device (2) through a data line (11).

2. The automatic tensioning device for the conveyor belt of the GDS1000-BV packaging machine according to claim 1, characterized in that, The first tensioning device (1) includes: a floating bracket (4), the front end of the floating bracket (4) is detachably installed with a tensioning roller (8), and a rotary encoder (9) is arranged on one side of the floating bracket (4); A tension spring (5), which is arranged between the floating bracket (4) and the mounting seat (6), is fixedly connected to the floating bracket (4) at the front end and fixedly connected to the mounting seat (6) at the rear end; A mounting seat (6), which is arranged in the middle of the first tensioning device (1), and an electric push rod (10) is installed inside the mounting seat (6) to connect the floating bracket (4); A controller (7), which is installed at the rear end of the mounting seat (6) and is electrically connected to the rotary encoder (9) and the electric push rod (10).

3. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 2, characterized in that, The floating bracket (4) has a "C" - shaped structure, including a mounting hole (41), a circular hole I (42), a connecting convex block (43) and a connecting plate (44). The mounting hole (41) is a through - hole, arranged on the side of the "C" - shaped groove for installing the tensioning roller (8) and the rotary encoder (9). The circular hole I (42) is arranged on the rear end face of the floating bracket (4), and the tension spring (5) is installed in the circular hole I (42). The connecting convex blocks (43) are arranged on both sides of the circular hole I (42) and are internally connected to the push rod end of the electric push rod (10). The connecting plate (44) is fixedly connected to one side edge of the floating bracket (4) through bolts, and the connecting plate (44) is provided with a slider (45) which is slidably connected to the mounting seat (6).

4. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 2, characterized in that, The mounting seat (6) includes a square groove (61), a fixing plate (62), a side plate (63) and a circular hole II (64). The square groove (61) is arranged on the rear end face of the mounting seat (6), and two groups of symmetrical square through - grooves (65) are arranged on the closed end face of the square groove (61). The electric push rod (10) is installed in the square through - groove (65). The fixing plate (62) is fixedly connected to the side of the mounting seat (6) and is bolt - connected and fixed to the back plate of the packaging machine conveyor belt (12) during use. The side plate (63) is arranged on the other side of the mounting seat (6) and is bolt - connected to the side plate of the conveying bracket of the packaging machine conveyor belt (12). The circular hole II (64) is arranged on the front end face of the mounting seat (6) for connecting the tail end of the tension spring (5).

5. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 4, characterized in that, The mounting base (6) further includes linear sliding grooves (66). There are two linear sliding grooves (66) in total, which are arranged on the side end faces of the mounting base (6) for internally embedding and slidingly connecting sliders (45).

6. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 2, characterized in that, The controller (7) includes a control block (71) and a screen panel (72). A "C"-shaped groove is provided at the front end of the control block (71) for installing the motor end of the electric push rod (10). A connection hole (73) is provided at the rear end face of the controller (7) and is connected to the master control device (3) by inserting a data cable (11). The screen panel (72) is arranged on the front side of the controller (7), and an indicator light (74) is provided at the corner of the screen panel (72), which flashes different color lights according to different data signals to play a reminder role.

7. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 6, characterized in that, A support leg (75) is provided on the back of the screen panel (72) and is snap-connected to the mounting base (6). A connecting plate (44) is arranged in the internal space area of the support leg (75).

8. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 1, characterized in that, The second tensioning device (2) includes a floating bracket (4), a tension spring (5), a mounting base (6), a controller (7), a tensioning roller (8), a rotary encoder (9), and an electric push rod (10). The structure of the second tensioning device (2) is exactly the same as that of the first tensioning device (1), and the second tensioning device (2) is arranged symmetrically with the first tensioning device (1) in a mirror image manner.

9. An automatic tensioning device for the conveyor belt of a GDS1000-BV packaging machine according to claim 1, characterized in that, The master control device (3) includes a data cable (11). The master control device (3) is installed on the back plate of the conveyor belt (12) of the packaging machine by bolts. The master control device (3) is connected to the first tensioning device (1) and the second tensioning device (2) respectively through two data cables (11).

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