Bag feeding type packaging machine with material compensation function

Abstract

The utility model belongs to the field of packaging machines, and provides a bag feeding type packaging machine with a material compensation function. Comprising a rotating disc, a discharging mechanism, a weighing mechanism, a clamping mechanism and an electric control system. Wherein the blanking mechanism comprises a main blanking device and a supplementary blanking device which are arranged around the turntable; the weighing mechanism comprises a support and a weighing sensor which is installed on the support and used for weighing. The clamping mechanism comprises a first clamp connected to the rotating disc and a second clamp connected to the weighing end of the weighing sensor. The first clamp and the second clamp can alternately clamp a target packaging bag, and the first clamp can sequentially move the target packaging bag to the positions corresponding to the main discharging device, the second clamp and the supplementary discharging device. And the electric control system is in communication connection with the weighing sensor, the main feeder and the supplementary feeder.

Description

Technical Field

[0001] The present application relates to the field of packaging machines, and in particular to a bag-feeding packaging machine with a material compensation function. Background Art

[0002] With the rapid development of industries like food, pharmaceuticals, and cosmetics, the demand for packaging equipment is increasing, particularly in terms of precision and efficiency in the product packaging process. While traditional bag-feeding packaging machines achieve a degree of automation, they often suffer from uneven weight distribution when handling material filling, severely impacting product quality and creating a poor user experience. Therefore, addressing these technical issues is crucial. To ensure that final packaging materials leave the factory within acceptable weight limits, weighing and sorting are typically performed, removing underweight bags and recycling their contents for repackaging. However, a high proportion of underweight bags can severely impact production efficiency and result in material loss. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a bag-feeding packaging machine with a material compensation function to solve the technical problem of uneven packaging weight in the packaging machine in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is to provide a bag-feeding packaging machine with a material compensation function, comprising:

[0005] A turntable, used to rotate around its own central axis;

[0006] A feeding mechanism includes a main feeding device and a supplementary feeding device which are sequentially arranged around the turntable along the rotation direction of the turntable and are used to feed target packaging bags respectively;

[0007] A weighing mechanism, comprising a bracket and a weighing sensor mounted on the bracket and used for weighing, wherein the weighing sensor is located between the main feeder and the supplementary feeder along the rotation direction of the turntable;

[0008] The clamping mechanism includes a first clamp connected to the turntable and a second clamp connected to the weighing end of the load cell, wherein the first clamp and the second clamp are capable of alternately clamping the target package bag, and the first clamp is capable of sequentially moving the target package bag to positions corresponding to the main feeder, the second clamp, and the supplementary feeder as the turntable rotates;

[0009] The electronic control system is communicatively connected to the weighing sensor, the main feeder and the supplementary feeder.

[0010] Optionally, the clamping mechanism further includes a top plate, and a plurality of second clamps are evenly arranged on the top plate and connected to the weighing end of the weighing sensor through the top plate.

[0011] Optionally, the first fixture includes a guide cylinder connected to the turntable, a push-pull shaft movably mounted on the guide cylinder, and a driving mechanism transmission-connected to the push-pull shaft and used to drive the push-pull shaft to reciprocate with the guide cylinder;

[0012] The first clamp also includes a fixed clamp connected to the guide cylinder, a movable clamp hinged on the fixed clamp, and a linkage block rotatably connected to the movable clamp and the push-pull shaft through pins. The pins are parallel to the rotation center axis of the movable clamp relative to the fixed clamp and can enable the movable clamp to rotate relative to the fixed clamp during the reciprocating movement of the push-pull shaft.

[0013] Optionally, a cavity is formed inside the guide cylinder and the push-pull shaft and the linkage block are both arranged in the cavity;

[0014] The guide cylinder is also provided with an open groove which is connected to the cavity and for transmission connection between the push-pull shaft and the driving mechanism. The middle part of the dynamic clamp extends into the cavity to be hinged with the linkage block.

[0015] Optionally, the first clamp further comprises a sliding sleeve connected to the push-pull shaft and slidably connected to the guide cylinder;

[0016] The sliding direction of the sliding sleeve relative to the guide cylinder is parallel to the moving direction of the push-pull shaft relative to the guide cylinder.

[0017] Optionally, the driving mechanism includes a linkage seat connected to the push-pull shaft and extending from the opening slot to the cavity, and further includes a support and a swing rod hinged to the support via a pin, wherein the linkage seat is located on the swing path of the swing rod;

[0018] The driving mechanism also includes a rotating shaft seat, a rotating arm rotatably mounted on the rotating shaft seat, and a first pull rod and a second pull rod spaced apart and connected to the rotating arm. The rotating arm is connected to the rocker arm through the first pull rod and is connected to the rocker arm and the cam in sequence through the second pull rod so that the rocker arm can swing back and forth with the pin shaft as the rotating axis during the rotation of the cam.

[0019] Optionally, the first clamp further comprises a spring coaxially sleeved on the push-pull shaft, the guide cylinder is used to accommodate the inner ring platform formed on the cavity wall of the push-pull shaft and arranged around the push-pull shaft, and the two ends of the spring along its own deformation direction respectively abut against the inner ring platform and the linkage seat;

[0020] The spring and the rocker are located on opposite sides of the linkage seat.

[0021] Optionally, the first fixture further comprises a retaining ring which is slidably mounted on the push-pull shaft and through which the push-pull shaft passes;

[0022] The retaining ring is located between the spring and the inner ring platform and abuts against the spring and the inner ring platform respectively.

[0023] Optionally, the first clamp further comprises a column sleeved on the linkage seat and a clamp-releasing push plate connected to the rocker rod;

[0024] The clamp releasing push plate is formed into an arc shape adapted to the annular side wall of the cylinder.

[0025] Optionally, the first clamp further includes a machine clamp arm, and the guide cylinder is arranged on the machine clamp arm and connected to the turntable through the machine clamp arm.

[0026] The beneficial effect of the bag-feeding packaging machine with a material compensation function provided by the present application is that: compared with the existing technology, in the bag-feeding packaging machine with a material compensation function of the present application, the first clamp connected to the turntable can rotate with the turntable and rotate the target packaging bag in sequence to the corresponding main feeder, weighing sensor and replenishing feeder. The target packaging bag filled by the main feeder can obtain the weight of the material already filled in the target packaging bag after being clamped by the second clamp connected to the weighing end of the weighing sensor and the first clamp is released. Since the main feeder, the weighing sensor and the replenishing feeder are all communicatively connected to the electronic control system and can be automatically controlled by the electronic control system, the replenishing feeder can obtain the weighing data of the weighing sensor through the electronic control system, so that when the second clamp is released and the first clamp continues to clamp the target packaging bag to the corresponding replenishing feeder, the replenishing feeder replenishes the material. In this way, it can be well ensured that the weight of the material in each target packaging bag is roughly the same, which is far superior to the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 A schematic diagram of the overall structure of a bag-feeding packaging machine with a material compensation function provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the partial structure of a bag-feeding packaging machine with a material compensation function provided in an embodiment of the present application;

[0030] Figure 3 This is a schematic diagram of the overall structure of the clamping mechanism in the embodiment of the present application;

[0031] Figure 4 This is a front view of the overall structure of the clamping mechanism in the embodiment of the present application;

[0032] Figure 5 For the Figure 4 Cross-sectional structural diagram along line AA;

[0033] Figure 6 For the Figure 4 Cross-sectional structural diagram along line BB.

[0034] Among them, the reference numerals in the figure are: 100, turntable; 201, main feeder; 202, feed feeder; 301, bracket; 302, weighing sensor; 401, first clamp; 402, second clamp; 403, top plate; 411, guide cylinder; 412, push-pull shaft; 413, fixed clamp; 414, movable clamp; 415, pin; 416, linkage block; 417, cavity; 418, opening slot; 419, sliding sleeve ; 420, linkage seat; 421, support; 422, pin shaft; 423, rocker arm; 424, shaft seat; 425, rotating arm; 426, first pull rod; 427, second pull rod; 428, rocker arm; 429, cam; 430, spring; 431, inner ring platform; 432, retaining ring; 433, column; 434, loosening push plate; 435, machine clamping arm; 500, electronic control system; 1000, target packaging bag. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0036] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0039] Please also refer to Figures 1 to 6 The following describes a bag-feeding packaging machine with a material compensation function provided by an embodiment of the present application. The bag-feeding packaging machine with a material compensation function includes a turntable 100, a feeding mechanism, a weighing mechanism, a clamping mechanism, and an electronic control system 500. Among them:

[0040] The turntable 100 is used to rotate around its own central axis. The unloading mechanism includes a main unloader 201 and a supplementary unloader 202, which are arranged in sequence around the turntable 100 along the direction of rotation of the turntable 100 and are used to unload target packaging bags 1000 respectively; the weighing mechanism includes a bracket 301 and a weighing sensor 302 installed on the bracket 301 and used for weighing. The weighing sensor 302 is located between the main unloader 201 and the supplementary unloader 202 along the direction of rotation of the turntable 100; the clamping mechanism includes a first clamp 401 connected to the turntable 100. and the second clamp 402 connected to the weighing end of the weighing sensor 302, the first clamp 401 and the second clamp 402 can alternately clamp the target packaging bag 1000 and the first clamp 401 can move the target packaging bag 1000 to the positions corresponding to the main feeder 201, the second clamp 402 and the replenishing feeder 202 in sequence while following the rotation of the turntable 100; the electronic control system 500 is communicatively connected to the weighing sensor 302, the main feeder 201 and the replenishing feeder 202.

[0041] According to the above-described structure provided in this embodiment, in this embodiment of the bag-feeding packaging machine with a material compensation function, the first clamp 401 connected to the turntable 100 can rotate with the turntable 100 and sequentially rotate the target bag 1000 to the corresponding positions of the main feeder 201, the load cell 302, and the supplemental feeder 202. After the target bag 1000 filled by the main feeder 201 is clamped by the second clamp 402 connected to the weighing end of the load cell 302 and the first clamp 401 is released, the weight of the material already filled in the target bag 1000 can be obtained. Since the main feeder 201, the weighing sensor 302 and the feeding feeder 202 are all communicatively connected to the electronic control system 500 and can be automatically controlled by the electronic control system 500, the feeding feeder 202 can obtain the weighing data of the weighing sensor 302 through the electronic control system 500, so that when the second clamp 402 is released and the first clamp 401 continues to clamp the target packaging bag 1000 to the corresponding feeding feeder 202, the feeding feeder 202 replenishes the material. In this way, it can be well ensured that the weight of the material in each target packaging bag 1000 is roughly the same to achieve the set packaging accuracy, which is far better than the existing technology.

[0042] In another embodiment of this application, please refer to Figures 1 to 6 The clamping mechanism further includes a top plate 403. A plurality of second clamps 402 are evenly arranged on the top plate 403 and connected to the weighing end of the load cell 302 via the top plate 403. According to the structure provided in this embodiment, multiple second clamps 402 can be connected to the top plate 403 to provide a more stable clamping of the target packaging bag 1000. Typically, the first clamps 402 utilize a pneumatic finger structure.

[0043] In another embodiment of this application, please refer to Figures 1 to 6The first clamp 401 includes a guide cylinder 411 connected to the turntable 100, a push-pull shaft 412 movably mounted on the guide cylinder 411, and a driving mechanism that is transmission-connected to the push-pull shaft 412 and is used to drive the push-pull shaft 412 to reciprocate relative to the guide cylinder 411. The first clamp 401 also includes a fixed clamp 413 connected to the guide cylinder 411, a movable clamp 414 hinged to the fixed clamp 413, and a linkage block 416 that is rotationally connected to the movable clamp 414 and the push-pull shaft 412 via a pin 415. The pin 415 is parallel to the central axis of rotation of the movable clamp 414 relative to the fixed clamp 413 and can enable the movable clamp 414 to rotate relative to the fixed clamp 413 during the reciprocating movement of the push-pull shaft 412. According to the above structure provided in this embodiment, the push-pull shaft 412 can drive the dynamic clamp 414 to rotate relative to the fixed clamp 413 during the movement relative to the guide cylinder 411. In this way, not only can the target packaging bag 1000 be clamped more stably through the cooperation of the dynamic clamp 414 and the fixed clamp 413, but the dynamic clamp 414 and the push-pull shaft 412 connected by the linkage block 416 can also enable the push-pull shaft 412 to drive the dynamic clamp 414 to rotate through linear movement, so that the clamping mouth of the dynamic clamp 414 is away from the clamping mouth of the fixed clamp 413, that is, to achieve a flexible clamping action, and release the target packaging bag 1000, thereby further improving the cooperation stability of the dynamic clamp 414 and the fixed clamp 413.

[0044] In another embodiment of this application, please refer to Figures 1 to 6 A cavity 417 is formed within the guide cylinder 411, and the push-pull shaft 412 and the linkage block 416 are both disposed within the cavity 417. The guide cylinder 411 also has an open slot 418 that communicates with the cavity 417 and allows for transmission connection between the push-pull shaft 412 and the drive mechanism. The middle portion of the dynamic clamp 414 extends into the cavity 417 to be hingedly connected to the linkage block 416. According to the structure provided in this embodiment, the push-pull shaft 412 and the linkage block 416 disposed within the cavity 417 of the guide cylinder 411 can be protected by the guide cylinder 411, thereby enabling long-term stable use, which significantly improves the operational stability of the bag-feeding packaging machine with a material compensation function in this embodiment.

[0045] In another embodiment of this application, please refer to Figures 1 to 6 The first clamp 401 further includes a sliding sleeve 419 connected to the push-pull shaft 412 and slidably connected to the guide cylinder 411. The sliding direction of the sliding sleeve 419 relative to the guide cylinder 411 is parallel to the movement direction of the push-pull shaft 412 relative to the guide cylinder 411. According to the above structure provided in this embodiment, the sliding sleeve 419 slidably connected to the guide cylinder 411 can significantly improve the movement stability of the push-pull shaft 412, which is conducive to further improving the mating stability of the dynamic clamp 414 and the fixed clamp 413.

[0046] In another embodiment of this application, please refer to Figures 1 to 6The driving mechanism includes a linkage seat 420 connected to the push-pull shaft 412 and extending from the opening slot 418 to the cavity 417, and also includes a support 421 and a swing rod 423 hinged on the support 421 through a pin 422. The linkage seat 420 is located on the swing path of the swing rod 423; the driving mechanism also includes a shaft seat 424, a rotating arm 425 rotatably mounted on the shaft seat 424, and a first pull rod 426 and a second pull rod 427 connected to the rotating arm 425 at intervals. The rotating arm 425 It is connected to the rocker arm 423 through the first pull rod 426 and connected to the rocker arm 428 and the cam 429 in sequence through the second pull rod 427 so that the rocker arm 423 can swing back and forth with the pin shaft 422 as the rotation axis during the rotation of the cam 429. Here, the rotating arm 425 is usually a triangular arm or a V-shaped arm, that is, the first pull rod 426 and the second pull rod 427 are respectively movably hinged at the far ends of the two arms of the triangular arm, and an axis hole is opened at the connecting position of the two arms, which can be rotatably connected to the axis of the rotating shaft seat 424.

[0047] According to the above-described structure provided in this embodiment, when the cam 429 rotates, it transmits power to the rocker arm 428, the second pull rod 427, the rotating arm 425, and the first pull rod 426 to the rocker arm 423, causing the rocker arm 423 to swing relative to the support 421 about the pin 422. In this way, the linkage seat 420, located in the swing path of the rocker arm 423, can be driven by the rocker arm 423 to drive the push-pull rod to reciprocate, achieving a stable driving effect. Furthermore, in this embodiment, rotating the rotating arm 425 mounted on the rotating shaft seat 424 effectively changes the arrangement direction of the first pull rod 426 and the second pull rod 427, thereby significantly reducing the overall space occupied by the bag-feeding packaging machine with material compensation function in this embodiment.

[0048] In another embodiment of this application, please refer to Figures 1 to 6 The first clamp 401 also includes a spring 430 coaxially sleeved on the push-pull shaft 412. The guide cylinder 411 is used to accommodate the cavity wall of the push-pull shaft 412 to form an inner ring platform 431 ringed around the push-pull shaft 412. The two ends of the spring 430 along its own deformation direction respectively abut against the inner ring platform 431 and the linkage seat 420. The spring 430 and the rocker arm 423 are located on opposite sides of the linkage seat 420. According to the above structure provided in this embodiment, since the spring 430 and the rocker arm 423 are located on opposite sides of the linkage seat 420, when the rocker arm 423 swings in the direction away from the linkage seat 420, the spring 430 abutting between the push-pull shaft 412 and the inner ring platform 431 can abut against the push-pull shaft 412 and automatically reset the push-pull shaft 412, so that the clamping mouth of the movable clamp 414 is close to the clamping mouth of the fixed clamp 413, that is, a flexible clamping action is realized, and the target packaging bag 1000 is automatically re-clamped, so that the first clamp 401 provided in this embodiment can achieve automatic clamping and locking to operate at lower power, thereby achieving a good energy-saving effect.

[0049] In another embodiment of this application, please refer to Figures 1 to 6 The first fixture 401 further includes a retaining ring 432 that is slidably mounted on the push-pull shaft 412 and through which the push-pull shaft 412 passes. The retaining ring 432 is located between the spring 430 and the inner ring 431 and abuts against the spring 430 and the inner ring 431, respectively. According to the structure provided in this embodiment, the retaining ring 432 not only further improves the movement stability of the push-pull shaft 412, but also effectively closes the opening on one side of the cavity 417, thereby providing a better protection for the guide cylinder 411.

[0050] In another embodiment of this application, please refer to Figures 1 to 6 The first clamp 401 further includes a column 433 mounted on the linkage seat 420 and a clamp release push plate 434 connected to the rocker arm 423. The clamp release push plate 434 is formed into an arc shape that is adapted to the annular side wall of the column 433. According to the above structure provided in this embodiment, the clamp release push plate 434 is formed to be adapted to the annular side wall of the column 433, which can make the process of the rocker arm 423 driving the linkage seat 420 to move more stable, which is conducive to further improving the matching stability of the dynamic clamp 414 and the fixed clamp 413. Here, it can be understood that usually two first clamps 401 are provided at intervals to respectively clamp the two edges of the target packaging bag 1000. In this way, the clamp release push plate 434 can simultaneously open or close the two first clamps 401 when opening, and the synchronization is good.

[0051] In another embodiment of this application, please refer to Figures 1 to 6 The first clamp 401 further includes a clamping arm 435, and the guide cylinder 411 is disposed on the clamping arm 435 and connected to the turntable 100 via the clamping arm 435. According to the above structure provided in this embodiment, by connecting the guide cylinder 411 to the turntable 100 via the clamping arm 435, the clamping stability of the first clamp 401 on the target packaging bag 1000 can be significantly improved. It is understandable that the connection between the clamping arm 435 and the turntable 100 can adopt the existing clamping technology of the bag-feeding packaging machine.

[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A bag-feeding packaging machine with a material compensation function, characterized in that: include: A turntable (100), configured to rotate around its own central axis; A material discharge mechanism, comprising a main discharger (201) and a supplementary discharger (202) sequentially arranged around the turntable (100) along the rotation direction of the turntable (100) and used for respectively discharging target packaging bags (1000); A weighing mechanism comprises a bracket (301) and a weighing sensor (302) mounted on the bracket (301) and used for weighing, wherein the weighing sensor (302) is located between the main feeder (201) and the supplementary feeder (202) along the rotation direction of the turntable (100); A clamping mechanism, comprising a first clamp (401) connected to the turntable (100) and a second clamp (402) connected to the weighing end of the weighing sensor (302), wherein the first clamp (401) and the second clamp (402) are capable of alternately clamping the target packaging bag (1000), and the first clamp (401) is capable of sequentially moving the target packaging bag (1000) to positions corresponding to the main feeder (201), the second clamp (402), and the supplementary feeder (202) while following the rotation of the turntable (100); The electric control system (500) is communicatively connected to the weighing sensor (302), the main feeder (201) and the supplementary feeder (202).

2. The bag-feeding packaging machine with material compensation function according to claim 1, characterized in that: The clamping mechanism further comprises a top plate (403), and a plurality of second clamps (402) are evenly arranged on the top plate (403) and connected to the weighing end of the weighing sensor (302) through the top plate (403).

3. The bag-feeding packaging machine with material compensation function according to claim 1, characterized in that: The first clamp (401) comprises a guide cylinder (411) connected to the turntable (100), a push-pull shaft (412) movably mounted on the guide cylinder (411), and a driving mechanism that is transmission-connected to the push-pull shaft (412) and is used to drive the push-pull shaft (412) to reciprocate relative to the guide cylinder (411); The first clamp (401) further includes a fixed clamp (413) connected to the guide cylinder (411), a movable clamp (414) hinged on the fixed clamp (413), and a linkage block (416) rotatably connected to the movable clamp (414) and the push-pull shaft (412) via a pin (415), wherein the pin (415) is parallel to the rotation center axis of the movable clamp (414) relative to the fixed clamp (413) and can enable the movable clamp (414) to rotate relative to the fixed clamp (413) during the reciprocating movement of the push-pull shaft (412).

4. The bag-feeding packaging machine with material compensation function according to claim 3, characterized in that: A cavity (417) is formed inside the guide cylinder (411), and the push-pull shaft (412) and the linkage block (416) are both arranged in the cavity (417); The guide cylinder (411) is also provided with an open slot (418) that is connected to the cavity (417) and is used for transmission connection between the push-pull shaft (412) and the driving mechanism. The middle portion of the dynamic clamp (414) extends into the cavity (417) to be hinged to the linkage block (416).

5. The bag-feeding packaging machine with material compensation function according to claim 4, characterized in that: The first clamp (401) further includes a sliding sleeve (419) connected to the push-pull shaft (412) and slidably connected to the guide cylinder (411); The sliding direction of the sliding sleeve (419) relative to the guide cylinder (411) is parallel to the moving direction of the push-pull shaft (412) relative to the guide cylinder (411).

6. The bag-feeding packaging machine with material compensation function according to claim 4, characterized in that: The driving mechanism includes a linkage seat (420) connected to the push-pull shaft (412) and extending from the opening slot (418) to the cavity (417), and also includes a support (421) and a swing rod (423) hinged to the support (421) via a pin (422), and the linkage seat (420) is located on the swing path of the swing rod (423); The driving mechanism also includes a rotating shaft seat (424), a rotating arm (425) rotatably mounted on the rotating shaft seat (424), and a first pull rod (426) and a second pull rod (427) spaced apart and connected to the rotating arm (425). The rotating arm (425) is connected to the rocker arm (423) through the first pull rod (426) and is connected to the rocker arm (428) and the cam (429) in sequence through the second pull rod (427) so that the rocker arm (423) can swing back and forth with the pin shaft (422) as the rotating axis during the rotation of the cam (429).

7. The bag-feeding packaging machine with material compensation function according to claim 6, characterized in that: The first clamp (401) further includes a spring (430) coaxially sleeved on the push-pull shaft (412), the guide cylinder (411) is used to accommodate the cavity wall of the push-pull shaft (412) to form an inner ring platform (431) arranged around the push-pull shaft (412), and the two ends of the spring (430) along its own deformation direction respectively abut against the inner ring platform (431) and the linkage seat (420); The spring (430) and the rocker (423) are located on opposite sides of the linkage seat (420).

8. The bag-feeding packaging machine with material compensation function according to claim 7, characterized in that: The first clamp (401) further comprises a retaining ring (432) which is slidably mounted on the push-pull shaft (412) and through which the push-pull shaft (412) passes; The retaining ring (432) is located between the spring (430) and the inner ring platform (431) and abuts against the spring (430) and the inner ring platform (431) respectively.

9. The bag-feeding packaging machine with material compensation function according to claim 7, characterized in that: The first clamp (401) further includes a column (433) sleeved on the linkage seat (420) and a clamp-releasing push plate (434) connected to the rocker (423); The clamp-releasing push plate (434) is formed into an arc shape adapted to the annular side wall of the column (433).

10. The bag-feeding packaging machine with material compensation function according to claim 3, characterized in that: The first clamp (401) further comprises a machine clamp arm (435), and the guide cylinder (411) is arranged on the machine clamp arm (435) and connected to the turntable (100) via the machine clamp arm (435).

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