A packaging bag cutting mechanism

Abstract

This utility model discloses a packaging bag cutting mechanism, belonging to the field of cutting mechanisms. The device includes a support structure, a feeding mechanism, a drive mechanism, a cutting assembly, and a receiving device. It achieves mechanical synchronization between feeding and cutting through a lever-driven linkage between a grooved wheel and a cam. In the feeding mechanism, the lever first contacts the grooved wheel during rotation and drives it to rotate, causing the conveyor rod to intermittently feed material. After feeding is completed, the lever disengages from the grooved wheel and continues to rotate, contacting the first cam and driving the cam mechanism to press the cutter down, achieving the cutting action. After cutting, the cutter automatically resets under the action of a spring. The device has a compact overall structure and a clear drive path, achieving a continuous cycle of "feeding—cutting—resetting" without a complex control system. It is particularly suitable for production environments with limited electrical control conditions and process scenarios requiring high synchronization between feeding rhythm and cutting.

Description

Technical Field

[0001] This utility model relates to a cutting mechanism, and more particularly to a packaging bag cutting mechanism. Background Technology

[0002] In the food, chemical raw material, and pharmaceutical intermediate industries, aluminum foil bags are commonly used as the primary packaging material to achieve moisture-proof, light-proof, and vacuum preservation. In automated packaging production, aluminum foil bags need to be cut into individual packaging bags according to a set length; the cutting accuracy directly affects the product qualification rate and packaging effect. Current equipment often uses a grooved wheel mechanism for intermittent feeding, with the cutting blade driven by a cam, cylinder, or servo motor to complete the cutting. In most structures, feeding and cutting are controlled by different power sources, typically relying on programs or sensors to achieve cycle synchronization.

[0003] However, this separate drive method has obvious drawbacks: first, the lack of physical linkage between feeding and cutting makes it prone to timing deviations due to signal delays or response errors, leading to off-center cutting, missed cuts, or material waste; second, the complex system structure and numerous control links increase energy consumption and maintenance difficulty, affecting the overall efficiency and stability of the machine. Therefore, there is an urgent need to design a mechanism that can achieve synchronous linkage between feeding and cutting actions, stable operation, and a simplified structure to improve the overall performance of the equipment. Utility Model Content

[0004] This utility model provides a packaging bag cutting mechanism, which aims to achieve coordinated control of feeding and cutting actions through structural optimization, simplify the system structure, improve operational stability and reliability, avoid cutting errors and material waste caused by control delays or cycle deviations, thereby enhancing the equipment's ability to adapt to continuous production and its fault tolerance performance.

[0005] A packaging bag cutting mechanism, comprising:

[0006] Support structure, feeding mechanism, drive mechanism, cutting assembly and receiving device;

[0007] The driving mechanism includes a lever, which is rotatably connected to a grooved wheel in the feeding mechanism and abuts against a first cam in the cutting mechanism; the feeding mechanism includes a conveying rod, the outer surface of which is provided with a rubber sleeve, and the grooved wheel is fixedly connected to one end of the conveying rod; the cutting mechanism includes a third drive shaft, with a first cam and a second cam fixedly connected to both ends of the third drive shaft, a connecting rod provided below the second cam, and an upper cutter fixedly connected to the lower end of the connecting rod.

[0008] Preferably, the feeding mechanism includes a limiting housing, which is a hollow structure with a rectangular through hole at its top.

[0009] Preferably, the cutting mechanism includes a lower cutter, which is fixedly installed in a groove in the edge region of the top surface of the limiting housing.

[0010] Preferably, during the rotation of the lever, it first rotates and connects with the grooved wheel, and then abuts against the non-circular arc segment of the first cam.

[0011] Preferably, the first cam and the second cam are arranged in opposite directions.

[0012] Preferably, a spring is provided on the connecting rod, the upper end of the spring is fixed to the shoulder of the connecting rod, and the lower end is connected to the tool mounting seat.

[0013] Preferably, the feeding mechanism includes a guide rod, which is disposed above the conveying rod.

[0014] Preferably, the driving mechanism includes a manual crank, which is fixedly connected to a first drive shaft. The first drive shaft is connected to a second drive shaft via a belt drive. A connecting plate is fixedly installed at one end of the second drive shaft, and the lever is fixedly connected to the far end of the connecting plate.

[0015] Preferably, the support structure includes a support base, on which a first L-shaped mounting base, a second L-shaped mounting base, a third L-shaped mounting base and a fourth L-shaped mounting base are fixedly connected.

[0016] Preferably, the receiving device includes a support frame, a conveyor belt is provided above the support frame, and a transmission structure is provided on the side of the support frame.

[0017] The beneficial effects of this utility model are as follows: Through the structural design of the lever-linked grooved wheel and the first cam, it achieves mechanical linkage between the feeding mechanism and the cutting assembly. The lever periodically rotates to drive the grooved wheel to complete the feeding, and after feeding, it actuates the first cam to drive the upper cutter downwards to complete the cutting. This achieves an action rhythm of "intermittent feeding, cutting after feeding," effectively avoiding cutting errors and material waste caused by asynchronous feeding and cutting, and improving the synchronization and cutting accuracy of the entire machine. In the feeding mechanism, the conveyor rod is fitted with a rubber sleeve to increase friction with the aluminum foil bag, ensuring stable feeding and providing a certain buffering capacity. The guide rod and the limiting housing work together to guide the material into the cutting area, ensuring flatness and directional consistency during feeding. The cam mechanism in the cutting assembly uses a first cam and a second cam arranged in opposite directions, and drives the upper cutter downwards via a connecting rod, and automatically resets under the action of a spring. The structure is simple and the operation is reliable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the packaging bag cutting mechanism of this utility model;

[0019] Figure 2 This is a top view of the round packaging bag cutting mechanism of this utility model;

[0020] Figure 3 This is a rear view of the round packaging bag cutting mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the round packaging bag cutting mechanism of this utility model;

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. Support structure; 101. Rectangular support base; 102. First L-shaped mounting base; 103. Second L-shaped mounting base; 104. Third L-shaped mounting base; 105. Fourth L-shaped mounting base;

[0024] 200. Feeding mechanism; 201. Rewinding rod; 202. Conveying rod; 203. Guide rod; 204. Rubber sleeve; 205. Grooved wheel; 206. Limiting housing;

[0025] 300. Drive mechanism; 301. Manual crank; 302. First drive shaft; 303. Second drive shaft; 304. First pulley; 305. Second pulley; 306. Belt; 307. Connecting plate; 308. Lever;

[0026] 400. Cutting assembly; 401. Third drive shaft; 402. First cam; 403. Second cam; 404. Bearing; 405. Bearing mount; 406. Tool mount; 407. Spring; 408. Connecting rod; 409. Upper tool; 410. Lower tool;

[0027] 500. Material receiving device; 501. Support frame; 502. Conveyor belt; 503. Transmission structure; Detailed Implementation

[0028] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0029] like Figures 1 to 4 As shown in the figure, a packaging bag cutting mechanism provided in this embodiment of the present invention includes a support structure 100, a feeding mechanism 200, a driving mechanism 300, a cutting component 400, and a receiving device 500. The feeding mechanism 200 and the driving mechanism 300 are disposed on the support structure 100, and the receiving device 500 is disposed at the end position of the overall processing path. The feeding mechanism 200 and the cutting component 400 are mechanically linked through the driving mechanism 300 to complete the feeding and cutting actions.

[0030] The support structure 100 includes a rectangular support base 101. Four sets of L-shaped mounting seats are sequentially fixedly connected to the top surface of the rectangular support base 101 along its length: a first L-shaped mounting seat 102, a second L-shaped mounting seat 103, a third L-shaped mounting seat 104, and a fourth L-shaped mounting seat 105. The four sets of L-shaped mounting seats are arranged parallel to each other along the width direction of the rectangular support base 101. The first L-shaped mounting seat 102 is located at the upper left corner of the top surface of the rectangular support base 101. The second L-shaped mounting seat 103 is located to the right of the first L-shaped mounting seat 102 and is spaced apart from it. The third L-shaped mounting seat 104 is located in the lower right region of the rectangular support base 101, with the fourth L-shaped mounting seat 105 spaced apart to its left.

[0031] The feeding mechanism 200 includes a winding rod 201, which is rotatably connected to a pair of first L-shaped mounting seats 102. An aluminum foil bag to be cut is fitted onto the winding rod 201. A conveying rod 202 is located on the right side of the winding rod 201, and is rotatably connected to a pair of second L-shaped mounting seats 103. One end of the conveying rod 202 extends through and out of the second L-shaped mounting seat 103 towards the inner side of the support structure 100, and a grooved wheel 205 is fixedly installed at the extended end for mechanical transmission with the drive mechanism 300. A rubber sleeve 204 is fitted onto the conveying rod 202. The rubber sleeve 204 is made of high-elasticity, wear-resistant rubber, has a hollow cylindrical structure, and has evenly distributed protrusions on its outer surface. Its inner diameter matches the outer diameter of the conveying rod 202, and it is fixedly fitted onto the outer surface of the conveying rod 202 by an interference fit, thereby increasing friction and providing cushioning. A guide rod 203 is provided on the conveying rod 202, and a vertical gap is maintained between the guide rod 203 and the conveying rod 202. This gap allows space for the material to pass through during the feeding process and guides the aluminum foil bag to flatten and guide it, ensuring its flatness and preventing folding or wrinkling. A limiting housing 206 is provided on the right side of the guide rod 203. The limiting housing 206 is fixedly connected to the rectangular support base 101. The limiting housing 206 has a hollow structure and a rectangular through hole at the top, which guides and limits the aluminum foil bag material entering the housing, ensuring its stable centering during the feeding process.

[0032] The drive mechanism 300 includes a manual crank 301. A first drive shaft 302 is fixedly connected to the manual crank 301 away from its operating end. The first drive shaft 302 is rotatably connected to a pair of third L-shaped mounting seats 104. A first pulley 304 is fixedly connected to the first drive shaft 302. A second pulley 305 is connected to the first pulley 304 via a belt drive. A second drive shaft 303 is fixedly connected to the second pulley 305. The second drive shaft 303 is rotatably connected to a pair of fourth L-shaped mounting seats 105. One end of the second drive shaft 303 extends out of the fourth L-shaped mounting seat 105 near the inner side of the support structure 100, and a connecting plate 307 is fixedly installed at its extended end. A lever 308 is fixedly connected to the distal end of the connecting plate 307. To ensure that the lever 308 can simultaneously contact and drive both the grooved wheel 205 and the first cam 402, the length of the connecting plate 307 needs to be determined according to the actual transmission requirements.

[0033] The cutting assembly 400 includes a bearing mounting base 405, with a bearing 404 fixedly connected to the top of the bearing mounting base 405. A third drive shaft 401 is fixedly mounted in the bearing 404 via an interference fit. A first cam 402 is fixedly connected to the end of the third drive shaft 401 near the inner end of the support structure 100, and a second cam 403 is fixedly connected to the other end away from the first cam 402. The first cam 402 and the second cam 403 are arranged in opposite directions, with their contour curves in opposite directions. The non-circular arc segment of the second cam 403 abuts against a connecting rod 408. A cutter mounting base 406 is provided below the connecting rod 408. A bearing mounting base 405 is provided on one side of the cutter mounting base 406. An upper cutter 409 is fixedly connected to the lower end of the connecting rod 408. A lower cutter 410 is provided below the upper cutter 409. To facilitate the installation of the lower cutter 410 and the smooth feeding of the material after cutting, a groove is provided in the top edge area of ​​the limiting housing 206, and the lower cutter 410 is fixedly installed in the groove. The upper end of the connecting rod 408 is provided with a shoulder mechanism, and a spring 407 passes through the connecting rod 408. The upper end of the spring 407 is fixed to the shoulder of the connecting rod 408, and its lower end is connected to the tool mounting seat 406, realizing the automatic reset function after the cutting action is completed. The lever 308 rotates around the second transmission shaft 303 and periodically abuts against the non-circular arc section of the first cam 402 to realize intermittent drive. The torque is transmitted to the second cam 403 through the third transmission shaft 401. When the second cam 403 rotates, it pushes the connecting rod 408, causing the upper tool 409 to move downward and cooperate with the lower tool 410 to complete the cutting action. After the cutting is completed, when the lever 308 disengages from the abutment area with the first cam 402, the upper tool 409 automatically resets under the elastic force of the spring 407.

[0034] The receiving device 500 includes a support frame 501, a conveyor belt 502 is arranged above the support frame 501, and a transmission structure 503 is also arranged on one side of the support frame 501. The transmission structure 503 drives the conveyor belt 502 to run. The receiving device 500 is reasonably positioned and can effectively support the falling aluminum foil bags, ensuring stable material transportation and facilitating subsequent packaging processes.

[0035] Working Principle: This utility model discloses a packaging bag cutting mechanism. A lever 308 drives a grooved wheel 205 to rotate, which in turn drives a connected conveyor rod 202 to rotate. This, in turn, causes friction between the outer rubber sleeve 204 and the aluminum foil bag, achieving stable feeding of the pre-loaded aluminum foil bag onto the take-up rod 201. During conveying, the aluminum foil bag is flattened by the guide rod 203 and enters the cutting area through the through-hole in the limiting housing 206, ensuring stable posture and centering during feeding. After one feeding action is completed, the lever 308 continues to rotate.

[0036] During rotation, the lever 308 periodically contacts the non-circular arc segment of the first cam 402, achieving intermittent drive of the first cam 402. The first cam 402 drives the second cam 403 to rotate via the third transmission shaft 401. The non-circular arc segment of the second cam 403 pushes the connecting rod 408 downward, causing the upper cutter 409 to move downward and cooperate with the lower cutter 410 to complete the cutting. After cutting, the lever 308 disengages from the contact area of ​​the first cam 402, and the connecting rod 408 returns to its original position under the elastic force of the spring 407. The cut aluminum foil bag falls naturally onto the receiving device 500 located at the end of the processing path, and the transmission structure 503 drives the conveyor belt 502 to smoothly transport the finished product to the subsequent packaging process.

[0037] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A packaging bag cutting mechanism, characterized in that, It includes a support structure (100), a feeding mechanism (200), a drive mechanism (300), a cutting mechanism (400), and a receiving device (500); the drive mechanism (300) includes a lever (308), which is rotatably connected to a grooved wheel (205) in the feeding mechanism (200), and the lever (308) abuts against a first cam (402) in the cutting mechanism (400); the feeding mechanism (200) includes a conveying rod (202), which... A rubber sleeve (204) is provided on the outer surface of the conveying rod (202), and the grooved wheel (205) is fixedly connected to one end of the conveying rod (202); the cutting mechanism (400) includes a third drive shaft (401), and a first cam (402) and a second cam (403) are fixedly connected to both ends of the third drive shaft (401), and a connecting rod (408) is provided below the second cam (403), and an upper cutter (409) is fixedly connected to the lower end of the connecting rod (408).

2. The packaging bag cutting mechanism according to claim 1, characterized in that, The feeding mechanism (200) includes a limiting housing (206), which is a hollow structure with a rectangular through hole at its top.

3. The packaging bag cutting mechanism according to claim 2, characterized in that, The cutting mechanism (400) includes a lower cutter (410), which is fixedly installed in a groove in the edge region of the top surface of the limiting housing (206).

4. The packaging bag cutting mechanism according to claim 1, characterized in that, During the rotation of the lever (308), it first rotates and connects with the grooved wheel (205), and then abuts against the non-circular arc segment of the first cam (402).

5. The packaging bag cutting mechanism according to claim 4, characterized in that, The first cam (402) and the second cam (403) are arranged in opposite directions.

6. The packaging bag cutting mechanism according to claim 1, characterized in that, A spring (407) is provided on the connecting rod (408). The upper end of the spring (407) is fixed to the shoulder of the connecting rod (408), and its lower end is connected to the tool mounting seat (406).

7. The packaging bag cutting mechanism according to claim 1, characterized in that, The feeding mechanism (200) includes a guide rod (203), which is disposed above the conveying rod (202).

8. The packaging bag cutting mechanism according to claim 1, characterized in that, The drive mechanism (300) includes a manual crank (301), which is fixedly connected to a first drive shaft (302). The first drive shaft (302) is connected to a second drive shaft (303) via a belt drive. A connecting plate (307) is fixedly installed at one end of the second drive shaft (303), and the lever (308) is fixedly connected to the far end of the connecting plate (307).

9. A packaging bag cutting mechanism according to claim 1, characterized in that, The support structure (100) includes a support base (101), on which a first L-shaped mounting seat (102), a second L-shaped mounting seat (103), a third L-shaped mounting seat (104) and a fourth L-shaped mounting seat (105) are fixedly connected.

10. The packaging bag cutting mechanism according to claim 1, characterized in that, The receiving device (500) includes a support frame (501), a conveyor belt (502) is provided above the support frame (501), and a transmission structure (503) is provided on the side of the support frame (501).

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