Multi-station translation variable-pitch output mechanism

Abstract

The invention relates to a multi-station translation variable-pitch output mechanism which is applied to a high-speed packaging machine, the output speed of the whole machine is reduced by designing multi-station synchronous output, the functions of arranging, aligning and pitch changing are achieved, and by selecting the translation variable-pitch mechanism to transfer and output, packaging bags can be neat in the front-back direction and consistent in row spacing; the multi-column weight detection device is simple in structure, adapts to the distance of each column of multi-column weight detection, completes synchronous multi-column output, facilitates next-step stacking and boxing, and has the advantages of being compact in structure, reliable in function and convenient to control.

Description

Technical Field

[0001] The invention relates to the field of packaging automation, and in particular to a multi-station translation variable-distance output mechanism. Background Art

[0002] High-speed packaging machine is a fully automatic packaging machine, which is a high-tech product of optomechanical integration. It can realize heat-sealing, forming, cutting, outputting, weight checking, stacking and boxing of packaging bags. At present, the finished bag output method adopted by high-speed packaging machines at home and abroad is usually as follows: the clamping device is installed on the clamping mounting plate of the packaging machine chain and can rotate with the chain. The product output is single-row output, and one or more slide channels are set for the output. The output can be adjusted to the required channel through the control of the cylinder push rod at different positions. Only one channel can be output at a time; the finished bag needs to be weight checked after output, and then stacked and boxed. However, since the existing high-speed packaging machine output device has no grouping function, it can only output single bags. Under high-speed conditions, single bag output is equipped with a single bag weight check scale, and rhythm matching is difficult; in order to facilitate the subsequent stacking of bags, there is also a double-pack output form, that is, the bag unscrambling device that alternately changes into the forward lying state and the reverse lying state through the front and rear lanes is convenient for the subsequent delivery to the stacking station for stacking and placing the bag, but after the double-pack output, there is a defect that the stack cannot be weight checked for a single bag. Summary of the invention

[0003] In view of the defects of the prior art, the present invention provides a multi-station translational variable-pitch output mechanism, which is designed for multi-station synchronous output and has the functions of sorting, alignment and variable pitch. It can make the packaging bags neat in the front and back directions, and the spacing between each column is consistent. It is adapted to the spacing between each column of multi-column weight inspection, completes synchronous multi-column output, improves output efficiency, and is facilitating the next step of stacking and boxing.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A multi-station translational variable pitch output mechanism is supported and erected between a suction station and a discharge station, and includes a drive system, a synchronous belt rotating mechanism and a translational variable pitch mechanism. The suction station and the discharge station are both provided with multiple rows of stations corresponding to multiple rows of packaging bag products. Multiple rows of adsorption mechanisms are installed on the translational variable pitch mechanism for adsorbing packaging bag products. The drive system and the synchronous belt rotating mechanism drive the translational variable pitch mechanism to swing back and forth between the suction station and the discharge station, thereby realizing the translational output of packaging bag products from the suction station to the discharge station.

[0005] Furthermore, the support frame includes support plates distributed on both sides of the workstation, a rotating shaft is installed between the support plates on both sides, the rotating shaft rotates driven by the driving system, two swing arms are symmetrically installed on the rotating shaft, one end of the swing arm is fixed on the rotating shaft, and the other end is provided with a mounting shaft through a bearing, the translational pitch changing mechanism is arranged between the two swing arms and fixed on the mounting shaft, and the synchronous belt rotating mechanism is connected between the rotating shaft and the mounting shaft.

[0006] Furthermore, a motor mounting frame is fixed on a supporting plate on one side of the supporting frame, which is used to install the motor of the driving system. A driving pulley and a driven pulley connected by a synchronous belt are provided on the supporting frame on the same side. The motor output shaft is connected to the driving pulley, and the driving pulley is connected to the driven pulley through a synchronous belt. The driven pulley is fixedly connected to the rotating shaft to drive the rotating shaft to rotate.

[0007] Furthermore, synchronous belt rotating mechanisms are symmetrically arranged at both ends of the rotating shaft, and each synchronous belt rotating mechanism includes a fixed pulley, a synchronous belt 2 and a planetary pulley. The fixed pulley is sleeved on the rotating shaft and fixedly connected to the support plate. The planetary pulley is fixed on the mounting shaft outside the swing arm. The planetary pulley is connected to the fixed pulley through the synchronous belt 2. The synchronous belt 2 is a synchronous toothed belt. The fixed pulley and the planetary pulley are both toothed pulleys.

[0008] Furthermore, a flange is sleeved on the rotating shaft located on the inner side of the support plate, the flange is fixed on the support plate, and the fixed pulley is fixedly connected to the flange.

[0009] Furthermore, the translational pitch-changing mechanism includes a guide rail mounting plate, a pitch-changing mounting plate and a slider assembly, the two ends of the guide rail mounting plate are respectively fixed on the mounting shafts on the inner sides of the two swing arms, a horizontal guide rail is provided on the guide rail mounting plate, a plurality of slider assemblies are arranged on the horizontal guide rail, a vacuum suction cup is connected under each slider assembly, vertical micro guide rails are provided at both ends of the guide rail mounting plate, the pitch-changing mounting plate is connected to the guide rail mounting plate through the micro guide rails, a plurality of guide grooves corresponding to the slider assemblies are provided on the pitch-changing mounting plate, bolt bearings are provided in the guide grooves and are connected to the upper ends of the slider assemblies, a cylinder is also installed on the guide rail mounting plate, the cylinder pushes the pitch-changing mounting plate to move up and down relative to the guide rail mounting plate, drives the bolt bearings to move in the guide grooves, thereby realizing the adjustment of the spacing between the sliders.

[0010] Furthermore, the guide groove is a long hole arranged on the variable pitch mounting plate. By setting the inclination angle of each long hole, it is ensured that the bottom end spacing of adjacent guide grooves is the same, the top end spacing of adjacent guide grooves is the same, but the bottom end spacing is different from the top end spacing.

[0011] Furthermore, a slide groove is provided at the upper end of the swing arm and is connected to an adjustment plate. The adjustment plate can adjust the installation distance along the slide groove direction and is fixed by bolts. The installation shaft is arranged on the adjustment plate through a bearing.

[0012] Furthermore, the suction station is arranged at the end of a slide plate, and the slide plate is an arc-shaped plate. A plurality of slides are arranged on the slide plate for synchronously outputting a plurality of rows of packaging bag products, and a liftable baffle is arranged at the end of the slide.

[0013] Furthermore, a bag pushing and alignment mechanism is provided at the end of the slide, and the bag pushing and alignment mechanism includes a base plate and a plurality of push plates arranged on the base plate, the plurality of push plates correspond one by one to the plurality of slides and are arranged on the same side of the slide, and the push plates can move toward the other side of the slide under the drive of the cylinder to arrange and align the packaging bag products.

[0014] Beneficial effects: 1. The present invention is mainly used in high-speed packaging machines to achieve grouped output and weight inspection of finished bags. By designing multi-station synchronous output, the output speed of the whole machine is slowed down, which is convenient for matching multiple columns of weight inspection stations, improving output efficiency, and facilitating the next step of stacking and boxing.

[0015] 2. The present invention, through the ingenious design of the translational pitch-changing mechanism and the synchronous belt rotating mechanism, utilizes the swing arm to drive the translational pitch-changing mechanism to swing and utilizes the synchronous belt rotating mechanism to offset the rotation, so that the angle of the translational pitch-changing mechanism remains unchanged during the swinging process, ensuring that the direction and posture of the packaging bag are consistent at the suction station and the discharge station, thereby achieving the purpose of translational output.

[0016] 3. The present invention provides a variable pitch mounting plate, on which multiple rows of guide grooves are arranged, and the slider assembly is connected to the guide grooves through bolt bearings. The spacing between the slider assemblies is changed by changing the position of the bolt bearings in the guide grooves to achieve the purpose of variable pitch, which is stable, reliable and easy to implement.

[0017] 4. The present invention has both the functions of sorting, aligning and changing the distance, which can make the packaging bags neat in the front and back directions, the spacing between each column is consistent, adapt to the spacing between each column of multi-column weight check, complete synchronous multi-column output, and facilitate the next step of stacking and boxing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall schematic diagram of the multi-station translation variable-pitch output mechanism; Figure 2 Schematic diagram of the chute section; Figure 3 Schematic diagram of the translation and pitch variation part; Figure 4 yes Figure 3 Schematic diagram of the medium translation and pitch-changing mechanism.

[0019] Reference numerals: 1 packaging bag, 2 slide plate, 3 baffle, 4 servo drive system, 5 synchronous belt rotation mechanism, 6 translation variable pitch mechanism, 7 checkweigher, 8 adjustment block, 9 vertical plate, 10 baffle cylinder, 11 adjustment screw, 12 push plate, 13 finishing cylinder, 14 fixed plate, 15 driven pulley, 16 motor mounting plate, 17 synchronous belt one, 18 flange, 19 support plate, 20 rotating shaft, 21 vacuum suction cup, 22 swing arm, 23 guide plate, 24 bolt bearing, 25 slider assembly, 26 variable pitch cylinder, 27 variable pitch mounting plate, 28 guide rail mounting plate, 29 miniature guide rail, 30 adjustment plate, 31 synchronous belt two, 32 planetary pulley, 33 fixed pulley, 34 horizontal guide rail, 35 mounting shaft. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The multi-station translation variable-distance output mechanism of the present invention is mainly used in a high-speed packaging machine. Figure 1 As shown, the multi-station translational variable-pitch output mechanism is set up between the output station of the finished bag of the high-speed granule packaging machine and the checkweigher station. It can receive the packaging bags output synchronously by the front-end slide plate 2 at multiple stations, and after sorting and aligning them, it is output to the belt of the multi-column checkweigher at the rear end through the translational variable-pitch mechanism, so as to facilitate the subsequent checkweighing, stacking and boxing functions of the packaging bags.

[0022] like Figure 1-4 As shown, the multi-station translation variable pitch output mechanism is supported and mounted on the frame of the high-speed packaging machine, located between the material picking station and the material discharging station, and includes a servo drive system 4, a synchronous belt rotation mechanism 5 and a translation variable pitch mechanism 6; the material picking station is arranged at the end of the slide plate 2, and the material discharging station is located on the belt of the checkweigher 7. The suction station and the material discharging station both correspond to multiple rows of packaging bags 1. After the packaging bags 1 are released from the previous process through the slide plate 2, they slide from the vertical direction to the end of the horizontal direction along the arc curve of the slide plate 2. At the same time, the baffle at the end of the slide plate 2 3 is in a raised state, the packaging bags 1 are arranged and aligned, and then the translation variable pitch mechanism 6 equipped with multiple rows of vacuum suction cups 21 rotates to the suction station to suck the packaging bags 1, and then the packaging bags 1 are translated to the belt of the checkweigher 7 by rotating the rotating swing arm. During the transportation process, the direction and posture of the packaging bags 1 at the suction station and the discharge station are ensured to be consistent, so as to achieve the purpose of translation output. At the same time, a variable pitch mechanism is designed in the translation process, which can adjust the distance between each row of packaging bags to adapt to the distance of the rear-end checkweigher 7.

[0023] like Figure 2 As shown (where Figure 2 (1) is a schematic diagram of the chute plate and baffle. Figure 2(2) is a schematic diagram of the bag pushing and aligning mechanism. The slide plate 2 is an arc-shaped plate. A plurality of slides are arranged on the slide plate 2 for synchronously outputting a plurality of rows of packaging bags 1. A liftable baffle 3 is arranged at the end of the slide. The bottom of the baffle 3 is fixedly connected to an adjustment block 8. The adjustment block 8 is connected to a long hole on the vertical plate 9 by an adjustment screw 11. The adjustment block 8 is pushed up and down by a baffle cylinder 10 to realize the lifting and lowering of the baffle 3.

[0024] A bag pushing and alignment mechanism is also provided at the end of the slide, and the bag pushing and alignment mechanism includes a fixed plate 14 and a plurality of push plates 12 arranged on the fixed plate 14. The plurality of push plates 12 correspond to the plurality of slides one by one and are arranged on the same side of the slides. The push plates 12 can move toward the other side of the slide under the drive of the sorting cylinder 13 to sort and align the packaging bags 1; the plurality of push plates 2 are controlled by the plurality of sorting cylinders 13. In the figure, each sorting cylinder 13 controls two push plates 12.

[0025] When the packaging bag 1 slides to the end of the chute 2, the baffle 3 blocks the bag so that the bag is aligned in the front and rear directions. The up and down movement of the baffle 3 is controlled by the baffle cylinder 10, and then through the bag pushing and alignment mechanism, multiple groups of sorting cylinders 13 synchronously control the movement of multiple push plates 12 to synchronously complete the sorting function of multiple columns (6 columns in the figure) of packaging bags 1, so that the packaging bags 1 that are tilted and scattered after sliding can maintain a constant spacing in the left and right directions and can maintain a stable shape in the horizontal direction. After sorting and alignment, the packaging bags 1 neatly arranged in the chute are transferred through the subsequent bag sucking action of the vacuum suction cup 21.

[0026] like Figure 1 and 3 As shown, the support frame includes support plates 19 distributed on both sides of the workstation, and a rotating shaft 20 is supported and installed between the support plates 19 on both sides. The rotating shaft 20 rotates under the drive of the servo drive system 4. Two swing arms 22 are symmetrically installed on the rotating shaft 20. The lower end of the swing arm 22 is fixed on the rotating shaft 20, and the upper end of the swing arm 22 is provided with a mounting shaft 35 through a bearing. The translational pitch-changing mechanism 6 is fixed on the mounting shaft 35 between the two swing arms 22. The servo drive system 4 is used to drive the rotating shaft 20 to rotate, and drives the translational pitch-changing mechanism 6 to rotate and swing through the swing arm 22. The synchronous belt rotating mechanism 5 is connected between the rotating shaft 20 and the mounting shaft 35, and the rotation of the mounting shaft 35 is offset by planetary motion, so that the translational pitch-changing mechanism 6 only translates but does not rotate.

[0027] A motor mounting plate 16 is fixed on a support plate 19 on one side of the support frame for mounting the motor of the servo drive system 4. A driving pulley (not shown in the figure due to obstruction) and a driven pulley 15 connected by a synchronous belt 17 are provided on the support plate 19 on the same side. The motor output shaft is connected to the driving pulley, and the driving pulley is connected to the driven pulley 15 by a synchronous belt 17. The driven pulley 15 is fixedly connected to the rotating shaft 20 to drive the rotating shaft 20 to rotate.

[0028] Both ends of the rotating shaft 20 are located on the outside of the swing arm 22 and are symmetrically arranged with synchronous belt rotating mechanisms 5. Each synchronous belt rotating mechanism 5 includes a fixed pulley 33, a synchronous belt 2 31 and a planetary pulley 32. The fixed pulley 33 is sleeved on the rotating shaft 20. The rotating shaft 20 located on the inner side of the support plate is also sleeved with a flange 18. The flange 18 is fixed on the support plate 19. The fixed pulley 33 is fixedly connected to the flange 18. The planetary pulley 32 is fixed on the mounting shaft 35 on the outside of the swing arm 22. The planetary pulley 32 is connected to the fixed pulley 33 through the synchronous belt 2 31. The synchronous belt 2 31 is a synchronous toothed belt. The fixed pulley 33 and the planetary pulley 32 are both toothed pulleys.

[0029] like Figure 3-4 As shown, the translational pitch-changing mechanism 6 includes a guide rail mounting plate 28, a pitch-changing mounting plate 27 and a slider assembly 26, the two ends of the guide rail mounting plate 28 are respectively fixed on the mounting shafts 35 on the inner sides of the two swing arms 22, a horizontal guide rail 34 is provided on the guide rail mounting plate 28, a plurality of slider assemblies 26 are arranged on the horizontal guide rail 34, a vacuum suction cup 21 is connected below each slider assembly 26, vertical micro guide rails 29 are provided at both ends of the guide rail mounting plate 28, the pitch-changing mounting plate 27 is connected to the guide rail mounting plate 28 through the micro guide rail 29, a plurality of guide grooves corresponding to the slider assemblies 26 are provided on the pitch-changing mounting plate 27, a guide groove plate 23 is correspondingly installed at the guide groove, a bolt bearing 24 is provided in the guide groove plate 23, and the bolt bearing 24 is connected to the upper end of the slider assembly 26.

[0030] The guide groove is a long hole arranged on the variable pitch mounting plate 27. By setting the inclination angle of each long hole, it is ensured that the bottom end spacing of adjacent guide grooves is the same, the top end spacing of adjacent guide grooves is the same, but the bottom end spacing is different from the top end spacing. In the illustrated embodiment, the bottom end spacing of the guide grooves is smaller than the top end spacing. The bottom end spacing of adjacent guide grooves is 95cm, and the top end spacing is 102cm.

[0031] The guide rail mounting plate 28 is also equipped with a variable pitch cylinder 26. When the variable pitch cylinder 26 is in motion, it pushes the variable pitch mounting plate 27 to perform linear motion on the micro guide rail 29, driving the bolt bearing 24 to slide in the guide groove. The spacing between the multiple groups of bolt bearings 24 at both ends of the slide groove is different. When the bolt bearings 24 slide from one end to the other end, the relative distance will change, thereby realizing the adjustment of the spacing between the slider assemblies 26.

[0032] Usually, the bolt bearing 24 is located at the bottom of the guide groove. At this time, the spacing between the vacuum suction cups 21 on the slider assembly 26 corresponds to the spacing between the suction stations. When the spacing between the discharge stations is inconsistent with the suction stations, the variable pitch mounting plate 27 is pushed downward to make the bolt bearing 24 slide to the top of the guide groove in the guide groove plate 23, and at the same time drive the slider assembly 26 to move on the horizontal guide rail 34 to achieve the variable pitch of the slider assembly 26; if the spacing between the discharge station and the suction station is consistent, no variable pitch is required during the translation process.

[0033] Furthermore, the upper end of the swing arm 22 is provided with a slide groove extending along the length direction of the swing arm 22, and an adjustment plate 30 is connected to the slide groove. The adjustment plate 30 can move along the direction of the slide groove to adjust the installation distance so as to change the length of the swing arm 22. The adjustment plate 30 is fixed to the swing arm 22 by bolts. When the adjustment plate 30 is provided at the upper end of the swing arm 22, the installation shaft 35 is arranged on the adjustment plate 30 through a bearing.

[0034] The translation working principle of the translation pitch-changing mechanism 6 is as follows: the servo drive system 4 fixes and drives a pair of synchronous pulleys to transmit power through the motor mounting plate 16 mounted on the support plate 19, wherein the driven pulley 15 is fixed on the rotating shaft 20, driving the rotating shaft 20 to rotate in the circumferential direction around its own axis, and one end of the swing arm 22 is fixed on the shaft 20, rotating with the rotating shaft 20, and the other end of the swing arm 22 is installed with a mounting shaft 35 through a bearing, and the translation pitch-changing mechanism 6 is fixed on the mounting shaft 35, and swings under the drive of the swing arm 22; at the same time, the synchronous Since the fixed pulley 33 with the rotating mechanism 5 is fixed on the flange 18, the fixed pulley 33 is fixed when the rotating shaft 20 rotates. The planetary pulley 32 is fixed on the mounting shaft 35 and performs relative rolling motion. Since the position of the fixed pulley 33 is fixed, the planetary pulley 32 and the rotating shaft 20 rotate in opposite directions with the same rotation angle. After the mutual cancellation is driven by the synchronous belt 2 31, the mounting shaft 35 fixedly connected to the planetary pulley 32 can always remain in a non-rotating state during the movement, so the translational pitch change mechanism 6 installed thereon can ensure directional consistency.

[0035] The working process of the entire multi-station translation and variable pitch mechanism is as follows: After the packaging bag 1 slides from the output of the previous process to the end of the chute plate 2, the baffle plate 3 and the push plate 12 work together to align the packaging bags 1 that are tilted and scattered after sliding in the front-to-back and left-to-right directions and keep their shapes stable. The neatly arranged packaging bags 1 are transported through the translational pitch-changing mechanism 6. When the translational pitch-changing mechanism 6 rotates to the suction station driven by the rotating shaft 20 and the swing arm 22, the vacuum suction cup 21 sucks the aligned packaging bags 1, and then the rotating shaft 20 reverses and rotates, and the translational pitch-changing mechanism 6 performs a return rotation motion. When it rotates to the unloading station above the checkweigher 7, the vacuum suction cup 21 is released, and the packaging bag 1 is placed on the front belt of the checkweigher 7, completing the translation output of the packaging bag 1. During the transportation process, the direction and posture of the packaging bag remain unchanged. The translational variable pitch mechanism can also change the spacing of each column of packaging bags as needed to adapt to the spacing of the checkweigher; the translational variable pitch mechanism performs reciprocating rotational motion in this way to complete the entire work process from front-end bag suction to rear-end bag placement, realizing synchronous multi-column output of packaging bags, which is beneficial to subsequent stacking and boxing.

[0036] The multi-station bag clamping and grouping output mechanism of the present invention is applied to high-speed packaging machines. Within a certain range, automatic grouping and stacking output of bags of different specifications can be achieved without adjusting the position. The matching high-speed granule packaging machine can realize heat-sealing, forming, cutting, and column output of packaging bags and adopts a PLC programmable controller to realize intelligent control. The final packaged products are output through group stacking, counting, and boxing. The technical level and working performance of the multi-station translational variable-pitch output mechanism are an important part of ensuring the reliable operation of the whole machine. Its compact structure, reliable function, convenient control and reliable performance ensure a series of stable outputs of the subsequent weight inspection, bag stacking and boxing of the whole machine.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-station translation variable-distance output mechanism, which is supported and erected between the suction station and the discharge station, and is characterized in that: The invention comprises a driving system (4), a synchronous belt rotating mechanism (5) and a translational variable pitch mechanism (6); the suction station and the discharge station are both provided with multiple rows of stations corresponding to multiple rows of packaging bag products; the translational variable pitch mechanism (6) is provided with multiple rows of adsorption mechanisms for sucking the packaging bag products; the driving system (4) and the synchronous belt rotating mechanism (5) drive the translational variable pitch mechanism (6) to swing back and forth between the suction station and the discharge station, thereby realizing translational output of the packaging bag products from the suction station to the discharge station.

2. A multi-station translation variable-distance output mechanism according to claim 1, characterized in that: The support frame comprises support plates distributed on both sides of the workstation, a rotating shaft (20) is installed between the support plates on both sides, the rotating shaft (20) rotates under the drive of the driving system (4), two swing arms are symmetrically installed on the rotating shaft (20), one end of the swing arm is fixed on the rotating shaft (20), and the other end is provided with a mounting shaft through a bearing, the translation variable pitch mechanism (6) is arranged between the two swing arms and fixed on the mounting shaft, and the synchronous belt rotating mechanism (5) is connected between the rotating shaft (20) and the mounting shaft.

3. A multi-station translation variable-distance output mechanism according to claim 2, characterized in that: A motor mounting plate (16) is fixed on a support plate on one side of the support frame for mounting a motor of a drive system (4); a driving pulley and a driven pulley (15) connected via a synchronous belt (17) are provided on the support frame on the same side; the motor output shaft is connected to the driving pulley, the driving pulley is connected to the driven pulley (15) via a synchronous belt, and the driven pulley (15) is fixedly connected to a rotating shaft (20) to drive the rotating shaft (20) to rotate.

4. The multi-station translation variable-distance output mechanism according to claim 2, characterized in that: Synchronous belt rotating mechanisms (5) are symmetrically arranged at both ends of the rotating shaft (20). Each synchronous belt rotating mechanism (5) comprises a fixed pulley (33), a synchronous belt second (31) and a planetary pulley (32). The fixed pulley (33) is sleeved on the rotating shaft (20) and fixedly connected to the support plate (19). The planetary pulley (32) is fixed on a mounting shaft (35) outside the swing arm (22). The planetary pulley (32) is connected to the fixed pulley (33) through the synchronous belt second (31). The synchronous belt second (31) is a synchronous toothed belt. The fixed pulley (33) and the planetary pulley (32) are both toothed pulleys.

5. The multi-station translation variable-distance output mechanism according to claim 4, characterized in that: A flange (18) is also sleeved on the rotating shaft (20) located on the inner side of the support plate (19); the flange (18) is fixed on the support plate (19); and the fixed pulley (33) is fixedly connected to the flange (18).

6. The multi-station translation variable-distance output mechanism according to claim 2, characterized in that: The translational pitch-changing mechanism (6) comprises a guide rail mounting plate (28), a pitch-changing mounting plate (27) and a slider assembly (25); the two ends of the guide rail mounting plate (28) are respectively fixed to mounting shafts (35) on the inner sides of two swing arms (22); a horizontal guide rail (34) is provided on the guide rail mounting plate (28); a plurality of slider assemblies (25) are arranged on the horizontal guide rail (34); a vacuum suction cup is connected below each slider assembly (25); vertical micro guide rails (29) are provided at the two ends of the guide rail mounting plate (28); and the pitch-changing mounting plate (27) is provided at the two ends of the guide rail mounting plate (28). The mounting plate (27) is connected to the guide rail mounting plate (28) through a micro guide rail (29); the variable pitch mounting plate (27) is provided with a plurality of guide grooves corresponding to the slider assemblies (25) one by one; bolt bearings (24) are provided in the guide grooves and are connected to the upper ends of the slider assemblies (25); a cylinder is also installed on the guide rail mounting plate (28); the cylinder pushes the variable pitch mounting plate (27) to move up and down relative to the guide rail mounting plate (28), driving the bolt bearings (24) to move in the guide grooves, thereby adjusting the spacing between the sliders.

7. The multi-station translation variable-distance output mechanism according to claim 6, characterized in that: The guide grooves are long holes arranged on the variable pitch mounting plate (27). By setting the inclination angle of each long hole, it is ensured that the bottom end spacing of adjacent guide grooves is the same, the top end spacing of adjacent guide grooves is the same, but the bottom end spacing is different from the top end spacing.

8. The multi-station translation variable-distance output mechanism according to claim 2, characterized in that: The upper end of the swing arm (22) is provided with a slide groove and connected to an adjustment plate (30); the adjustment plate can adjust the installation distance along the slide groove direction and is fixed by bolts; the installation shaft (35) is arranged on the adjustment plate (30) via a bearing.

9. The multi-station translation variable-distance output mechanism according to claim 1, characterized in that: The suction station is arranged at the end of a slide plate (2); the slide plate (2) is an arc-shaped plate; a plurality of slides are arranged on the slide plate (2) for synchronously outputting a plurality of rows of packaging bag products; and a liftable baffle (3) is arranged at the end of the slide.

10. The multi-station translation variable-distance output mechanism according to claim 9, characterized in that: A bag pushing and aligning mechanism is provided at the end of the slide groove, and the bag pushing and aligning mechanism comprises a base plate and a plurality of push plates (12) arranged on the base plate, the plurality of push plates (12) correspond one-to-one to the plurality of slide grooves and are arranged on the same side of the slide groove, and the push plates (12) can be driven by a cylinder to move toward the other side of the slide groove so as to align the packaging bag products.

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