Double-knife cutting mechanism of a package unpacking machine

Abstract

A double-knife cutting mechanism for a bag unpacking machine relates to a double-knife cutting mechanism. The present invention aims to solve the problems that the cutting mechanism of the existing bag unpacking machine cannot cut woven bag packaging bags, the material is mixed with packaging bag fragments after cutting, and part of the material remains in the packaging bag fragments. The present invention comprises a cutting knife (2), a swing arm mechanism (3), a blade transmission mechanism (4) and a reset mechanism (5), the swing arm mechanism (3) is installed on the upper part of the inside of a frame (1), each set of swing arm mechanisms (3) is in a "┌┘"-shaped structure, the lower parts of the two sets of swing arm mechanisms (3) are arranged oppositely, a cutting knife (2) is horizontally installed at the lower end of each set of swing arm mechanisms (3), the upper part of each set of swing arm mechanisms (3) is respectively connected to a blade transmission mechanism (4), the protruding end of each reset mechanism (5) is connected to a blade transmission mechanism (4), and the fixed end of each reset mechanism (5) is installed on the frame (1). The present invention is used for breaking packaging bags of a bag unpacking machine.

Description

Technical Field

[0001] The invention relates to a double-knife cutting mechanism, in particular to a double-knife cutting mechanism of a package unpacking machine. Background Art

[0002] Under the existing technology, the cutting mechanism of the unpacking machine mostly adopts a knife group mechanism composed of multiple parallel blades. The packaging bag falls from the top of the blade mechanism to the rotating blade mechanism for cutting. This cutting mechanism can only cut packaging bags made of most materials, but cannot cut woven bags. Moreover, the packaging bags after cutting are irregular geometric shapes of varying sizes, which makes it easy for packaging bag fragments to mix into the material. Some materials will remain in the packaging bags after cutting, resulting in material waste.

[0003] In summary, the cutting mechanism of the existing unpacking machine has the problems of being unable to cut woven bag packaging bags, packaging bag fragments being mixed in the cutting material, and part of the material remaining in the packaging bag fragments. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the cutting mechanism of the existing unpacking machine cannot cut woven bags, the material is mixed with bag fragments after cutting, and part of the material remains in the bag fragments. Further, a double-blade cutting mechanism of the unpacking machine is provided.

[0005] The technical solution of the present invention is: a double-knife cutting mechanism of a package unpacking machine is installed on a frame, and it includes two cutting knives, two blade transmission mechanisms driving the cutting knives, two reset mechanisms for completing the reset of the swing arm mechanism, and two groups of swing arm mechanisms. The swing arm mechanism is installed on the upper part of the interior of the frame, and each group of swing arm mechanisms is in a "┌┘"-shaped structure. The lower parts of the two groups of swing arm mechanisms are arranged relatively, and a cutting knife is horizontally installed at the lower end of each group of swing arm mechanisms. The upper part of each group of swing arm mechanisms is respectively connected to a blade transmission mechanism, and the protruding end of each reset mechanism is connected to a blade transmission mechanism, and the fixed end of each reset mechanism is installed on the frame.

[0006] Furthermore, the cutting knife is a disc-type blade.

[0007] Furthermore, the blade transmission mechanism includes a motor, a motor seat, a hollow shaft and a first bearing. The motor seat is mounted on the frame, the motor is mounted on the motor seat, and the hollow shaft is mounted inside the motor seat through the first bearing.

[0008] Furthermore, the swing arm mechanism includes a swing arm, a bearing seat, a synchronous pulley, a synchronous toothed belt, a first shaft and a second shaft. The swing arm is a hollow structure. The second shaft is vertically inserted into the hollow shaft. The upper end of the second shaft is connected to the output shaft of the motor. The synchronous pulley is mounted on the lower end of the second shaft. The bearing seat is vertically installed at the lower left end of the swing arm. The first shaft is vertically rotatably installed in the bearing seat. A synchronous pulley is installed at the upper end of the first shaft. A cutting knife is installed at the lower end of the first shaft. The synchronous pulley on the first shaft and the synchronous pulley on the second shaft are connected by a synchronous toothed belt.

[0009] Furthermore, the two cutting knives of the two sets of swing arm mechanisms are arranged staggered up and down.

[0010] Furthermore, the two reset mechanisms are horizontally arranged above the outside of the frame, and the axes of the cylinders of the two reset mechanisms are parallel to and equidistant from the center line of the length direction of the frame.

[0011] Furthermore, the reset mechanism includes a cylinder and a rocker rod, one end of the cylinder is mounted on the frame, and the other end of the cylinder is rotatably connected to the hollow shaft through the rocker rod.

[0012] Furthermore, the reset mechanism also includes a spring, a first pin, a second pin and a bolt, the second pin is installed at the end of the cylinder, the first pin is coaxially connected to the rocker arm, one end of the spring is connected to the first pin, and the other end of the spring is connected to the second pin via a bolt.

[0013] Compared with the prior art, the present invention has the following effects:

[0014] 1. The setting of the swing arm mechanism of the present invention can be applicable to the cutting of packaging bags of different specifications and models. The swing arm mechanism drives the cutting knife to separate to both sides to achieve the cutting of the packaging bag. After the cutting is completed, the swing arm mechanism carries the cutting knife to automatically reset under the action of the reset mechanism, which does not affect the cutting of the next packaging bag.

[0015] 2. The setting of the cutting knife of the present invention is helpful for cutting small dry powder packaging bags of different materials, which helps to disassemble the packaging bags intact and the cutting edges are neat, thereby improving the emptying rate of the material and reducing the possibility of mixing packaging bag fragments in the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional view of the installation position of the present invention in the unpacking machine;

[0017] Figure 2 is a stereogram of the present invention;

[0018] Figure 3 It is a front view of the present invention;

[0019] Figure 4 is a side view of the present invention;

[0020] Figure 5 is a top view of the present invention;

[0021] Figure 6 is a cross-sectional view of the present invention;

[0022] Figure 7 yes Figure 6 Section view along AA;

[0023] Figure 8 It is a schematic diagram of the swing state of the swing arm mechanism of the present invention. DETAILED DESCRIPTION

[0024] Specific implementation method 1: Combination Figures 1 to 7 The present embodiment is described. A double-knife cutting mechanism of a packing unpacking machine of the present embodiment is installed on a frame 1, and includes two cutting knives 2, two blade transmission mechanisms 4 for driving the cutting knives, two resetting mechanisms 5 for completing the resetting of the swing arm mechanism 3, and two groups of swing arm mechanisms 3. The swing arm mechanism 3 is installed on the upper part of the interior of the frame 1. Each group of swing arm mechanisms 3 is in a "┌┘"-shaped structure. The lower parts of the two groups of swing arm mechanisms 3 are arranged opposite to each other. A cutting knife 2 is horizontally installed at the lower end of each group of swing arm mechanisms 3. The upper part of each group of swing arm mechanisms 3 is respectively connected to a blade transmission mechanism 4, and the protruding end of each resetting mechanism 5 is connected to a blade transmission mechanism 4. The fixed end of each resetting mechanism 5 is installed on the frame 1.

[0025] The swing arm mechanism 3 of this embodiment is in a "┌┘" structure, the upper right part of the "┌┘" structure of the swing arm structure 3 is connected to the blade transmission mechanism 4, the lower left end of the "┌┘" structure of the swing arm structure 3 is connected to the fixed cutting knife 2, one end of the reset mechanism 5 is connected to the blade transmission mechanism 4 and the other end is fixedly connected to the frame 1, the blade transmission mechanism 4 drives the cutting knife 2 on the swing arm mechanism 3 to complete cutting, and after cutting, the reset mechanism 5 drives the swing arm mechanism 3 to complete the reset of the swing arm mechanism 3.

[0026] In this embodiment, the packaging bag touches the cutting knife 2 when it moves into the unpacking machine. The swing arm mechanism 3 connected to the upper part of the cutting knife 2 drives the cutting knife 2 to separate to both sides of the packaging bag. During the separation process, the cutting knife 2 breaks the packaging bag driven by the blade transmission mechanism 4. After the breaking, the reset mechanism 5 drives the swing arm mechanism 3 to complete the reset of the blade and the swing arm mechanism.

[0027] Specific implementation method 2: Combination Figures 1 to 7 In this embodiment, the cutting blade 2 is a disc-shaped blade. With such a configuration, the cutting blade 2 is helpful for cutting small dry powder packaging bags of different materials, helps to disassemble the packaging bags intact and the cutting edges are neat, improves the emptying rate of the material and reduces the possibility of mixing packaging bag fragments in the material. The other components and connection relationships are the same as those of the first embodiment.

[0028] Embodiment 3: Figures 1 to 7 In this embodiment, the blade drive mechanism 4 includes a motor 8, a motor base 7, a hollow shaft 6, and a first bearing 9. The motor base 7 is installed on the frame 1, the motor 8 is installed on the motor base 7, and the hollow shaft 6 is installed inside the motor base 7 through the first bearing 9. With this setting, the drive method is simple and reliable. The other components and connection relationships are the same as those in Embodiment 1 or 2.

[0029] Embodiment 4: Figures 1 to 7 In this embodiment, the swing arm mechanism 3 includes a swing arm 10, a bearing seat 11, a synchronous pulley 12, a synchronous toothed belt 13, a first shaft 14, and a second shaft 15. The swing arm 10 is a hollow structure. The second shaft 15 is vertically inserted into the hollow shaft 6, and the upper end of the second shaft 15 is connected to the output shaft of the motor 8. The synchronous pulley 12 is sleeved on the lower end of the second shaft 15. The bearing seat 11 is vertically installed at the lower left end of the swing arm 10. The first shaft 14 is vertically rotatably installed in the bearing seat 11. The synchronous pulley 12 is installed at the upper end of the first shaft 14, and the cutting knife 2 is installed at the lower end of the first shaft 14. The synchronous pulley 12 on the first shaft 14 and the synchronous pulley 12 on the second shaft 15 are connected by the synchronous toothed belt 13. With this setting, it can be applied to the cutting of packaging bags of different specifications and models. During the process of the swing arm mechanism 3 driving the cutting knife 2 to separate to both sides, the packaging bag is cut. After the cutting is completed, the swing arm mechanism 3 automatically resets with the cutting knife 2 under the action of the reset mechanism 5, without affecting the cutting of the next packaging bag. The other components and connection relationships are the same as those in Embodiment 1, 2, or 3.

[0030] In this embodiment, two groups of swing arm mechanisms 3 are arranged at equal distances on the left and right of the axis inside the upper part of the frame 1 in a "V" shape structure, and the cutting knives 2 installed at the lower parts of the two groups of swing arm mechanisms 3 partially overlap at the head of the "V" shape structure.

[0031] Embodiment 5: Figures 1 to 7 In this embodiment, the two cutting knives 2 of the two groups of swing arm mechanisms 3 are arranged staggeredly up and down. With this setting, it is prevented that the two cutting knives 2 interfere with each other during rotation, and the distance between the two cutting knives 2 is 3 - 8 mm. The other components and connection relationships are the same as those in Embodiment 1, 2, 3, or 4.

[0032] Embodiment 6: Figures 1 to 7 In this embodiment, the two reset mechanisms 5 are horizontally arranged above the outside of the frame 1, and the axes of the cylinders 18 of the two reset mechanisms 5 are parallel and equidistant from the center line in the length direction of the frame 1. With this setting, it is convenient for synchronization during rotation. The other components and connection relationships are the same as those in Embodiment 1, 2, 3, 4, or 5.

[0033] Specific implementation method seven: Combination Figures 1 to 7 To explain this embodiment, the reset mechanism 5 of this embodiment includes a cylinder 18 and a swing rod 20. One end of the cylinder 18 is mounted on the frame 1, and the other end of the cylinder 18 is rotatably connected to the hollow shaft 6 through the swing rod 20. With such an arrangement, reset is fast. Other components and connection relationships are the same as those of the specific embodiments 1, 2, 3, 4, 5 or 6.

[0034] Specific implementation method eight: Combination Figures 1 to 7 To explain this embodiment, the reset mechanism 5 of this embodiment further includes a spring 19, a first pin 21, a second pin 22 and a bolt 23. The second pin 22 is installed at the end of the cylinder 18. The first pin 21 is coaxially connected to the swing rod 20. One end of the spring 19 is connected to the first pin 21, and the other end of the spring 19 is connected to the second pin 22 through the bolt 23. This arrangement gives flexibility to the reset. Other components and connection relationships are the same as any one of the specific embodiments 1 to 7.

[0035] Combination Figures 1 to 7 The working process of the present invention is described as follows:

[0036] When the packaging bag moves into the unpacking machine, it touches the cutting knife 2. The swing arm mechanism 3 connected to the upper part of the cutting knife 2 drives the cutting knife 2 to separate to both sides of the packaging bag. During the separation process, the cutting knife 2 breaks the packaging bag driven by the blade transmission mechanism 4. After breaking, the reset mechanism 5 drives the swing arm mechanism 3 to complete the reset of the blade and the swing arm mechanism.

Claims

1. A double-blade cutting mechanism for a package unpacking machine, which is mounted on a frame (1), characterized in that: It comprises two cutting knives (2), two blade transmission mechanisms (4) for driving the cutting knives, two reset mechanisms (5) for completing the reset of the swing arm mechanism (3), and two groups of swing arm mechanisms (3). The swing arm mechanism (3) is installed on the upper part of the frame (1); each set of the swing arm mechanism (3) is in a "┌┘"-shaped structure; the lower parts of the two sets of the swing arm mechanisms (3) are arranged opposite to each other; a cutting knife (2) is horizontally installed at the lower end of each set of the swing arm mechanism (3); the upper part of each set of the swing arm mechanism (3) is respectively connected to a blade transmission mechanism (4); the protruding end of each reset mechanism (5) is connected to a blade transmission mechanism (4); and the fixed end of each reset mechanism (5) is installed on the frame (1); The cutting knife (2) is a disc-type blade; The two cutting knives (2) of the two sets of swing arm mechanisms (3) are arranged in a staggered manner up and down; the two reset mechanisms (5) are arranged horizontally above the outside of the frame (1), and the axes of the cylinders (18) of the two reset mechanisms (5) are parallel to and equidistant from the center line of the length direction of the frame (1); The reset mechanism (5) comprises a cylinder (18) and a swing rod (20), one end of the cylinder (18) is mounted on the frame (1), and the other end of the cylinder (18) is rotatably connected to the hollow shaft (6) via the swing rod (20); The reset mechanism (5) further comprises a spring (19), a first pin shaft (21), a second pin shaft (22) and a bolt (23), wherein the second pin shaft (22) is mounted on the end of the cylinder (18), the first pin shaft (21) is coaxially connected to the rocker (20), one end of the spring (19) is connected to the first pin shaft (21), and the other end of the spring (19) is connected to the second pin shaft (22) via the bolt (23).

2. The double-blade cutting mechanism of a package unpacking machine according to claim 1, characterized in that: The blade transmission mechanism (4) comprises a motor (8), a motor seat (7), a hollow shaft (6) and a first bearing (9); the motor seat (7) is mounted on a frame (1), the motor (8) is mounted on the motor seat (7), and the hollow shaft (6) is mounted inside the motor seat (7) via the first bearing (9).

3. The double-blade cutting mechanism of a package unpacking machine according to claim 2, characterized in that: The swing arm mechanism (3) comprises a swing arm (10), a bearing seat (11), a synchronous pulley (12), a synchronous toothed belt (13), a first shaft (14) and a second shaft (15). The swing arm (10) is a hollow structure. The second shaft (15) is vertically inserted into the hollow shaft (6). The upper end of the second shaft (15) is connected to the output shaft of the motor (8). The synchronous pulley (12) is sleeved on the lower end of the second shaft (15). The bearing seat (11) is vertically installed at the lower left end of the swing arm (10). The first shaft (14) is vertically rotatably installed in the bearing seat (11). The upper end of the first shaft (14) is equipped with a synchronous pulley (12). The lower end of the first shaft (14) is equipped with a cutting knife (2). The synchronous pulley (12) on the first shaft (14) and the synchronous pulley (12) on the second shaft (15) are connected by a synchronous toothed belt (13).

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