Automatic conversion mechanism for hot and cold cutting knives of bagging machine

Abstract

The present invention discloses an automatic conversion mechanism for cold and hot cutting knives of a bagging machine, which relates to the technical field of bagging machines and includes a bagging machine. The bagging machine is provided with a cold cutting knife assembly and a hot cutting knife assembly for cutting the film. The cold cutting knife assembly and the hot cutting knife assembly can realize the separate cutting operation of the cold cutting knife assembly or the hot cutting knife assembly through an automatic conversion mechanism. The automatic conversion mechanism includes a lifting assembly, a transmission assembly, a power assembly, and a cutting knife assembly installation mechanism. The present invention can realize the conversion from the cold cutting knife assembly to the hot cutting knife assembly, or from the hot cutting knife assembly to the cold cutting knife assembly according to the cutting use requirements of the bagging machine. The operation process is simple and flexible, and the purpose of automatic conversion is achieved, which has the effects of simplifying the operation steps of the staff and improving the working efficiency of the bagging machine.

Description

Technical Field

[0001] The present invention relates to the technical field of bagging machines, and in particular to an automatic conversion mechanism for cold and hot cutting knives of a bagging machine. Background Art

[0002] A bagging machine, also known as a shrink wrapping machine, is a machine that wraps a product with a heat shrinkable film and then heats it to shrink the film to wrap the product. Generally, a cold cutting blade and a hot cutting blade are installed on the bagging machine. As the name implies, the hot cutting blade is a knife used to cut an object after heating, while the cold cutting blade is a knife that directly cuts an object at room temperature.

[0003] Since the bagging machine cuts the film, it is necessary to cut the film into a set length to wrap the product. This process requires the use of a cold cutting knife. After cutting the film to the specified length, the next step is to perform a hot sealing step to complete the independent segmentation of the product packaging. Therefore, a hot cutting knife is required in this process. The switching operation between the cold cutting knife and the hot cutting knife on the existing bagging machine is cumbersome, making it inconvenient for the staff to install and use. Moreover, the stability effect after the conversion of the cold cutting knife or the hot cutting knife is not good, which may cause errors in the film cutting process, resulting in defects in the product packaging and affecting the subsequent sales situation. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic conversion mechanism for cold and hot cutting knives of a bagging machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automatic conversion mechanism for cold and hot cutting knives of a bagging machine, including a bagging machine. The bagging machine is provided with a cold cutting knife assembly and a hot cutting knife assembly for cutting the film. The cold cutting knife assembly and the hot cutting knife assembly can realize the separate cutting operation of the cold cutting knife assembly or the hot cutting knife assembly through an automatic conversion mechanism. The automatic conversion mechanism includes a lifting assembly, a transmission assembly, a power assembly, and a cutting knife assembly mounting mechanism.

[0006] As a further solution of the present invention: The lifting assembly includes two cylinders fixedly installed at corresponding positions on the frame of the bagging machine. The two cylinders are spaced apart and arranged at the same height, and the output ends of the two cylinders face upward and are fixedly installed with a top plate through a fine thread nut.

[0007] As a further solution of the present invention: The transmission assembly includes a guide post rotatably connected to the middle of the top plate at one end, and the other end of the guide post is vertically upward and passes through the perforation opened at the corresponding position of the middle partition. The upper part of the guide post is rotatably sleeved with an oil-free self-lubricating bearing through a bushing and is fixedly embedded in the perforation of the middle partition. At the same time, a large gear is fixedly sleeved on the guide post below the middle partition through a plain needle bearing. One side of the large gear is meshed and connected with a first gear. The lower end of the first gear is fixedly sleeved on the lower end of the rotating shaft. The middle of the rotating shaft is rotatably sleeved with an insert groove bearing and is fixedly embedded in the perforation opened at the corresponding position of the middle partition. And a transition gear is fixedly sleeved on the upper end of the rotating shaft. One side of the transition gear is meshed and connected with a second gear. The second gear is connected to the output shaft of the power assembly through a corresponding rotating shaft and a coupling.

[0008] As a further solution of the present invention: A first bearing retaining ring for maintaining the position of the large gear is fixedly sleeved on the guide post.

[0009] As a further solution of the present invention: First fixed distance rings and second fixed distance rings are sleeved on the upper parts of the rotating shafts on which the transition gear and the second gear are sleeved.

[0010] As a further solution of the present invention: Second shaft end retaining rings for preventing the transition gear and the second gear from slipping off are fixedly sleeved on the tops of the rotating shafts on which the transition gear and the second gear are sleeved.

[0011] As a further solution of the present invention: A baffle for preventing the top plate from slipping downward out of the guide post is fixedly installed at the bottom end of the guide post.

[0012] As a further solution of the present invention: The power assembly is a reduction motor, and the reduction motor is fixedly installed at the corresponding position on the lower surface of the middle partition.

[0013] As a further solution of the present invention: The installation mechanism of the cutter assembly includes a guide post seat fixedly connected to the top end of the guide post, and a rotating body adjustment plate for respectively installing the cold cutting knife assembly and the hot cutting knife assembly is also fixedly connected to one side of the guide post seat.

[0014] As a further solution of the present invention: The automatic conversion mechanism further includes a limiting mechanism for keeping the guide post seat stable during rotation when the cold cutting knife assembly or the hot cutting knife assembly is switched into place. The limiting mechanism includes a friction chassis fixedly sleeved on the lower part of the guide post, and a brake pad is fixedly connected to the top plate.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0016] 1. The present invention can, according to the cutting use requirements of the bagging machine, realize the conversion from the cold cutting knife assembly to the hot cutting knife assembly, or from the hot cutting knife assembly to the cold cutting knife assembly. The operation process is simple and flexible, and the purpose of automatic conversion is achieved, which has the effects of simplifying the operation steps of the staff and improving the working efficiency of the bagging machine.

[0017] 2. A limit mechanism is also provided in the automatic conversion mechanism of the present invention. Its function is that when the cold cutting knife assembly or the hot cutting knife assembly is converted, the reduction motor is started, the cylinder is activated, and the brake pad is pressed against the friction chassis to limit the rotation speed of the guide post, so that it slowly converts from the cold cutting knife assembly to the hot cutting knife assembly, or from the hot cutting knife assembly to the cold cutting knife assembly. After the conversion is in place, the reduction motor is turned off, and the brake pad is continuously pressed tightly against the friction chassis by means of the cylinder, so that the cold cutting knife assembly or the hot cutting knife assembly can be stabilized, ensuring the stability during subsequent cutting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic sectional view of the present invention;

[0019] Figure 2 is a schematic bottom view of the present invention;

[0020] Figure 3 is a schematic top view of the present invention.

[0021] In the figure: 1. Cylinder; 2. Fine thread nut; 3. Brake pad; 4. Friction chassis; 5. Intermediate partition; 6. Large gear; 7. Guide post seat; 8. Oil-free self-lubricating bearing; 9. First bearing retaining ring; 10. Bush; 11. Needle roller bearing; 12. Grooved bearing; 13. First spacing ring; 14. First gear; 15. Second spacing ring; 16. Second shaft end retaining ring; 17. Reduction motor; 18. Guide post; 19. Top plate; 20. Baffle; 21. Second gear; 22. Intermediate gear; 23. Rotating body adjustment plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 - 3, in the embodiment of the present invention, the automatic conversion mechanism of the cold and hot cutting knives of the bagging machine includes a cylinder 1, a fine-thread nut 2, a brake pad 3, a friction chassis 4, an intermediate partition 5, a large gear 6, a guide post seat 7, an oil-free self-lubricating bearing 8, a first bearing retaining ring 9, a bushing 10, a needle roller bearing 11, an insert bearing 12, a first spacer ring 13, a first gear 14, a second spacer ring 15, a second shaft end retaining ring 16, a reduction motor 17, a guide post 18, a top plate 19, a baffle 20, a second gear 21, an intermediate gear 22 and a rotating body adjustment plate 23. It includes a bagging machine, and the bagging machine is equipped with a cold cutting knife assembly and a hot cutting knife assembly for cutting the film. The cold cutting knife assembly and the hot cutting knife assembly can achieve the separate cutting operations of the cold cutting knife assembly or the hot cutting knife assembly through the automatic conversion mechanism. The automatic conversion mechanism includes a lifting assembly, a transmission assembly, a power assembly and a cutting knife assembly mounting mechanism. In the above technical solution, the bagging machine and the cold cutting knife assembly and the hot cutting knife assembly on the bagging machine are all prior arts, and their assembly methods are all conventional technologies. The present invention only makes improvements on the operation step of how to achieve the automatic conversion between the cold cutting knife assembly and the hot cutting knife assembly.

[0024] Further, the lifting assembly includes two cylinders 1 fixedly installed at corresponding positions on the frame of the bagging machine. The two cylinders 1 are spaced apart and arranged at the same height, and the output ends of the two cylinders 1 both face upward and are fixedly installed with a top plate 19 through a fine-thread nut 2. Thus, by controlling the synchronous lifting and lowering of the output ends of the two cylinders 1, the effect of vertically pushing up the top plate 19 can be achieved, and the purpose of pulling down the top plate 19 can also be achieved by controlling the synchronous lowering of the output ends of the two cylinders 1, so as to facilitate the conversion and positioning requirements of the cold cutting knife assembly or the hot cutting knife assembly.

[0025] Further, the transmission assembly includes a guide post 18 whose one end is rotatably connected to the middle of the top plate 19. The other end of the guide post 18 faces upward vertically and passes through a perforation opened at the corresponding position of the intermediate partition 5. The upper part of the guide post 18 is rotatably sleeved with an oil-free self-lubricating bearing 8 through a bushing 10 and is fixedly embedded in the perforation of the intermediate partition 5. At the same time, a large gear 6 is fixedly sleeved on the guide post 18 below the intermediate partition 5 through a needle roller bearing 11. One side of the large gear 6 is meshed and connected with a first gear 14. The lower end of the first gear 14 is fixedly sleeved on the lower end of a rotating shaft. The middle of the rotating shaft is rotatably sleeved with an insert bearing 12 and is fixedly embedded in a perforation opened at the corresponding position of the intermediate partition 5. And a transition gear 22 is fixedly sleeved on the upper end of the rotating shaft. One side of the transition gear 22 is meshed and connected with a second gear 21. The second gear 21 is connected to the output shaft of the power assembly through a corresponding rotating shaft and a coupling. Thus, by starting the reduction motor 17, the transition gear 22 can be driven to rotate by the second gear 21. While the transition gear 22 rotates, it is transmitted to the large gear 6 through the first gear 14, and finally the self-rotation of the guide post 18 is realized, so as to complete the switching process between the cold cutting knife assembly and the hot cutting knife assembly.

[0026] Furthermore, a first bearing retaining ring 9 for holding the position of the large gear 6 is fixedly sleeved on the guide post 18.

[0027] Furthermore, a first spacing ring 13 and a second spacing ring 15 are sleeved on the upper parts of the rotating shafts on which the idler gear 22 and the second gear 21 are sleeved, so as to ensure a stable transmission state between the idler gear 22 and the second gear 21.

[0028] Furthermore, second shaft end retaining rings 16 for preventing the idler gear 22 and the second gear 21 from slipping off are fixedly sleeved on the tops of the rotating shafts on which the idler gear 22 and the second gear 21 are sleeved.

[0029] Furthermore, a baffle 20 for preventing the top plate 19 from slipping downward out of the guide post 18 is fixedly installed at the bottom end of the guide post 18.

[0030] Furthermore, the power assembly is a reduction motor 17, and the reduction motor 17 is fixedly installed at the corresponding position on the lower surface of the middle partition plate 5.

[0031] Furthermore, the installation mechanism of the cutter assembly includes a guide post seat 7 fixedly connected to the top end of the guide post 18, and a rotating body adjustment plate 23 for respectively installing a cold cutter assembly and a hot cutter assembly is also fixedly connected to one side of the guide post seat 7, which can assemble the cold cutter assembly and the hot cutter assembly to realize the switching with the aid of the transmission assembly.

[0032] Furthermore, the automatic conversion mechanism further includes a limiting mechanism for keeping the guide post seat 7 stable in rotation when the cold cutter assembly or the hot cutter assembly is switched in place. The limiting mechanism includes a friction chassis 4 fixedly sleeved on the lower part of the guide post 18, and a brake pad 3 is fixedly connected to the top plate 19. When the cold cutter assembly or the hot cutter assembly is converted, the reduction motor 17 is turned on, and the air cylinder 1 is started to press the brake pad 3 against the friction chassis 4 so as to limit the rotation speed of the guide post 18, making it slowly convert from the cold cutter assembly to the hot cutter assembly, or from the hot cutter assembly to the cold cutter assembly. After the conversion in place is completed, the reduction motor 17 is turned off, and the air cylinder 1 is continued to be used to tightly press the brake pad 3 against the friction chassis 4, so that the cold cutter assembly or the hot cutter assembly can be stabilized, ensuring the stability during the subsequent cutting operation.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Automatic conversion mechanism for cold and hot cutting knives of bagging machine, including a bagging machine, wherein the bagging machine is provided with a cold cutting knife assembly and a hot cutting knife assembly for cutting the film, and is characterized in that, The cold cutting tool assembly and the hot cutting tool assembly can realize the separate cutting operation of the cold cutting tool assembly or the hot cutting tool assembly through an automatic conversion mechanism. The automatic conversion mechanism includes a lifting assembly, a transmission assembly, a power assembly, and a cutting tool assembly mounting mechanism; The lifting assembly includes two cylinders (1) fixedly installed at corresponding positions on the frame of the bagging machine. The two cylinders (1) are spaced apart and arranged at the same height. The output ends of the two cylinders (1) face upward and are fixedly installed with a top plate (19) through fine-thread nuts (2); The transmission assembly includes a guide post (18) rotatably connected to the middle of the top plate (19) at one end. The other end of the guide post (18) faces vertically upward and passes through a perforation opened at the corresponding position of the middle partition (5). The upper part of the guide post (18) is rotatably sleeved with an oil-free self-lubricating bearing (8) through a bushing (10) and is fixedly embedded in the perforation of the middle partition (5). At the same time, a large gear (6) is fixedly sleeved on the guide post (18) below the middle partition (5) through a plain needle bearing (11). One side of the large gear (6) is meshed and connected with a first gear (14). The lower end of the first gear (14) is fixedly sleeved on the lower end of a rotating shaft. The middle of the rotating shaft is rotatably sleeved with a grooved bearing (12) and is fixedly embedded in a perforation opened at the corresponding position of the middle partition (5). At the upper end of the rotating shaft, a transition gear (22) is fixedly sleeved. One side of the transition gear (22) is meshed and connected with a second gear (21). The second gear (21) is connected to the output shaft of the power assembly through a corresponding rotating shaft and a coupling; A first bearing retaining ring (9) for maintaining the position of the large gear (6) is fixedly sleeved on the guide post (18); First distance rings (13) and second distance rings (15) are sleeved on the upper parts of the rotating shafts on which the transition gear (22) and the second gear (21) are sleeved; Second shaft end retaining rings (16) for preventing the transition gear (22) and the second gear (21) from slipping off are fixedly sleeved on the tops of the rotating shafts on which the transition gear (22) and the second gear (21) are sleeved; A baffle (20) for preventing the top plate (19) from slipping downward out of the guide post (18) is fixedly installed at the bottom end of the guide post (18); The cutting tool assembly mounting mechanism includes a guide post seat (7) fixedly connected to the top end of the guide post (18). One side of the guide post seat (7) is also fixedly connected with a rotating body adjustment plate (23) for respectively installing the cold cutting tool assembly and the hot cutting tool assembly; The automatic conversion mechanism further includes a limiting mechanism for keeping the guide post seat (7) stable during rotation when the cold cutting tool assembly or the hot cutting tool assembly is switched in place. The limiting mechanism includes a friction chassis (4) fixedly sleeved on the lower part of the guide post (18), and a brake pad (3) is fixedly connected to the top plate (19).

2. The automatic conversion mechanism of the hot and cold cutting knives of the bagging machine according to claim 1, characterized in that, The power assembly is a reduction motor (17), and the reduction motor (17) is fixedly installed at the corresponding position on the lower surface of the middle partition (5).

Images