CN111168762A

CN111168762A - Plastic film unilateral hole digger

Info

Publication number: CN111168762A
Application number: CN202010145100.9A
Authority: CN
Inventors: 董荣雪
Original assignee: 杭州富阳鼎创科技有限公司
Current assignee: Guangzhou Sanhua Technology Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-05-19
Anticipated expiration: 2040-03-05
Also published as: CN111168762B

Abstract

The invention belongs to the technical field of plastic film perforating, and particularly relates to a plastic film single-side hole digger which comprises an actuating piece and a driving device. The hole forming device comprises a driving device and an executing piece, wherein the executing piece can be replaced by different types according to the size of holes to be formed in the plastic film; the sizes of the connecting parts of the executing part inner shell and the executing part outer shell in the executing parts with various models and the driving device outer shell and the driving device inner shell in the driving device are the same, the size of the hole punched by the executing part is determined by the size of the end, far away from the driving device, of the executing part inner shell and the executing part outer shell in the executing part and the size of the annular blade, and the size of the end, far away from the driving device, of the executing part inner shell and the executing part outer shell in the executing parts with different models and the size of the annular blade are different.

Description

Plastic film unilateral hole digger

Technical Field

The invention belongs to the technical field of plastic film hole opening, and particularly relates to a plastic film unilateral hole opener.

Background

In various plastic film processing technological processes, various plastic films are often required to be punched for packaging, but in the prior art, punching is mostly performed on one side, so that partial curling is easily caused by uneven surface tension of the plastic films, and the punching hole diameters are different.

For the situation, double-side punching is needed to be simultaneously used for punching, but the double-side punching can cause the equipment to have larger weight, be inconvenient to carry and need to be fixedly placed; for plastic films which are inconvenient to move or films in installation, the films cannot be moved to a fixed device with double-side-effect punching for punching, and then the movable device is required to punch; therefore, a portable punching device is needed to be designed to solve the problem of high-quality punching of the film which is inconvenient to move.

The invention designs a plastic film single-side hole digger to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a plastic film unilateral hole opener which is realized by adopting the following technical scheme.

A plastic film single-sided hole opener characterized in that: the device comprises an executing part and a driving device, wherein the executing part is arranged on the driving device in a buckling mode, and the driving device provides kinetic energy for the executing part; the execution piece can be changed into different models according to the size of the needed punched hole on the plastic film.

The sizes of the connecting parts of the executing part inner shell and the executing part outer shell in the executing parts with various types and the driving device outer shell and the driving device inner shell in the driving device are the same, the size of the hole punched by the executing part is determined by the size of the executing part inner shell and the executing part outer shell in the executing part far away from the driving device and the size of the annular blade, and the size of the executing part inner shell and the executing part outer shell in the executing parts with different types far away from the driving device and the size of the annular blade are different.

The executing part comprises an executing part inner shell, an executing part outer shell, an annular plate and an annular blade, wherein one end of the executing part outer shell and one end of the executing part inner shell are fixedly connected through the annular plate, and two circles of positioning air holes are uniformly formed in the annular plate in the inner circumferential direction and the outer circumferential direction; the executing part outer shell and the executing part inner shell are sequentially and circumferentially and uniformly fixedly connected through a plurality of connecting blocks along the axial direction of the executing part outer shell; the executing part inner shell and the executing part outer shell are fixed together through the connecting blocks which are uniformly distributed in the circumferential direction, so that the stability between the executing part inner shell and the executing part outer shell is improved; meanwhile, the connecting blocks in the same circumferential direction have larger gaps, and the connecting blocks cannot block an annular channel formed between the outer shell of the actuating element and the inner shell of the actuating element; the positioning air hole has the effects that when the punching position is positioned, a smaller negative pressure is formed in the positioning air hole firstly through the vacuum pump, the positioned plastic film is adsorbed and fixed, and a certain stable positioning effect is achieved in the cutting process; one end of the blade mounting ring is fixedly provided with a connecting sleeve through three connecting plates which are uniformly distributed in the circumferential direction, the blade mounting ring is connected with a driving device through the connecting sleeve, when a square shaft in the driving device is driven to rotate, the square shaft can drive the connecting sleeve to rotate, and the connecting sleeve drives the blade mounting ring to rotate; one end of the annular blade is provided with sawteeth which are used for improving the cutting effect of the annular blade on the plastic film in the rotating process; the other end of the annular blade is fixedly arranged on the blade mounting ring, the inner side of the annular blade is provided with a fixing ring through three connecting rods which are uniformly distributed in the circumferential direction, an annular sliding groove is formed in the stabilizing cone, and the stabilizing cone is arranged in the middle of the annular blade through the rotating fit of the annular sliding groove and the fixing ring; the connecting sleeve rotates to drive the blade mounting ring to rotate, and the blade mounting ring rotates to drive the annular blade to rotate; the stability of the plastic film during the cutting process is improved by the action of the stabilizing cone.

The driving device is provided with a vacuum pump and an adjusting mechanism, and the vacuum pump is controlled by a motor to generate negative pressure, so that the vacuum pump works to generate negative pressure on an executive component; the negative pressure surge of the inner shell of the control executive component can be adjusted and controlled through the adjusting mechanism; the driving device controls the annular blade to rotate; in the initial positioning stage, the vacuum pump works to enable the shell consisting of the executing part inner shell, the executing part outer shell and the annular plate and the executing part inner shell to generate negative pressure, and the negative pressure can adsorb the positioned plastic film on the executing part; then the negative pressure in the inner shell of the actuating element in the actuating element is suddenly increased through the adjustment of the adjusting mechanism, and the plastic film is cut through the high-strength negative pressure and the rotating blade.

As a further improvement of the technology, a first rubber ring is installed at one end, away from the annular plate, of the executing piece outer shell, and a second rubber ring is installed at one end, away from the annular plate, of the executing piece inner shell; the first rubber ring and the second rubber ring are used for ensuring the stability of the executing part outer shell, the executing part inner shell, the driving device outer shell and the driving device inner shell after installation.

The executing part inner shell, the executing part outer shell and the annular plate form an annular shell, one end of the shell is arranged on the driving device in a buckling mode, and two circles of positioning air holes are uniformly formed in the inner and outer circumferential directions on the end face of the other end of the shell; the inner circular surface of the executing piece close to one end of the annular plate is provided with an annular conical surface, and the annular conical surface is uniformly provided with a plurality of second friction bulges in the circumferential direction; all the positioning air holes formed in the annular plate are provided with annular chamfers, and the annular chamfers are provided with first friction bulges uniformly distributed in the circumferential direction; the first friction bulge and the second friction bulge play a role of ensuring the stability of the plastic film in the cutting process through friction.

As a further improvement of the technology, the driving device comprises an adjusting mechanism, a vacuum pump, a motor, an installation shell, a first piston, a second piston, a threaded ring, an installation ring, a driving device outer shell, a driving device inner shell, a square shaft, a first return spring and an energy storage spring, wherein an access pipe is fixedly installed at one end of the driving device outer shell; one end of the driving device inner shell is fixedly arranged on the access pipe through three connecting plates which are uniformly distributed in the circumferential direction, and the driving device inner shell and the driving device outer shell are sequentially and uniformly connected with each other through a plurality of connecting blocks in the circumferential direction along the axis direction of the driving device outer shell; an annular channel is formed between the outer shell of the driving device and the inner shell of the driving device, the channel is communicated with the access pipe and the inner shell of the driving device, and the communication area is an arc-shaped clearance area formed between the three connecting plates; the inner shell of the driving device and the outer shell of the driving device are fixed together through the connecting blocks which are uniformly distributed in the circumferential direction, so that the stability between the inner shell and the outer shell of the driving device is improved; meanwhile, the connecting blocks in the same circumferential direction have larger gaps, and the connecting blocks cannot block an annular channel formed between the outer shell of the driving device and the inner shell of the driving device; the inner circular surface of the driving device inner shell is provided with a section of internal thread; two mounting ring sleeves which are distributed inside and outside are arranged at one ends of the driving device inner shell and the driving device outer shell, which are far away from the access pipe; the installation ring sleeve is used for conveniently installing the executing piece, when the executing piece is installed, one end of the executing piece outer shell and the executing piece inner shell which are not fixedly connected in the executing piece is embedded and installed in the two installation ring sleeves of the driving device inner shell and the driving device outer shell, and the connecting part is fixed through a buckle; the buckle can be realized by the prior art; an annular channel is formed between the outer shell of the driving device and the inner shell of the driving device and is communicated with the access pipe; one end of the mounting shell is fixedly mounted at one end of the driving device shell, which is provided with the access pipe; the motor and the vacuum pump are respectively and fixedly installed in the installation shell, the input end of the vacuum pump is connected with the motor, and the output end of the vacuum pump is connected with the access pipe; the first piston is slidably arranged in the driving device inner shell, and a first return spring is arranged between the first piston and the end face of the driving device inner shell, which is close to one end of the access pipe; the first return spring is used for returning the first piston; the second piston is slidably arranged in the driving device inner shell, and an energy storage spring is arranged between the second piston and the first piston; the energy storage spring is used for storing force when the first piston slides towards one side of the motor relative to the second piston and the second piston is limited by the adjusting structure; when the adjusting mechanism is triggered to lose the limit of the second piston, the second piston can rapidly slide to one side close to the first piston under the tension of the energy storage spring; the threaded ring is installed in the inner shell of the driving device through matching with threads of internal threads on the inner circular surface of the inner shell of the driving device, a T-shaped rotating shaft is installed between the threaded ring and the second piston, one end of the T-shaped rotating shaft is fixedly installed on the threaded ring, and the other end of the T-shaped rotating shaft is rotatably installed on the second piston; when the second piston slides towards one side close to the first piston under the tension of the force storage spring, the second piston can pull the threaded sleeve to slide along the axis of the inner shell of the driving device through the T-shaped rotating shaft, and the threaded ring is in threaded fit with the inner shell of the driving device; the mounting ring is rotatably mounted on the inner circular surface of the inner shell of the driving device, and the mounting ring is in transmission connection with the threaded ring through a telescopic shaft; the square shaft is rotatably arranged on the mounting ring through a one-way clutch; the threaded ring can drive the mounting ring to rotate through the telescopic shaft when rotating; the mounting ring rotates to drive the square shaft to rotate through the one-way clutch, the one-way clutch designed by the invention is an overrunning clutch, and after the threaded ring stops rotating, the square shaft can also automatically rotate for a certain angle due to the action of the overrunning clutch; and the outer shell of the driving device and the inner shell of the driving device are provided with an adjusting mechanism for controlling whether the second piston can slide or not.

A plurality of first air holes are uniformly formed in the outer circular surface, located between the second piston and the threaded sleeve, of the inner shell of the driving device in the circumferential direction, and a one-way valve is installed in each first air hole.

In the invention, after the actuating element is installed, the channel formed by the outer shell of the driving device and the inner shell of the driving device is communicated with the channel formed between the inner shell of the actuating element and the outer shell of the actuating element, and the channel between the inner shell of the actuating element and the area of the inner shell of the driving device, which is positioned at one side of the second piston, opposite to the first piston is also communicated; in order to realize that when the vacuum pump starts to work, the first piston is driven to slide towards the side where the motor is installed, the vacuum pump can suck gas in a channel formed among the inner shell of the driving device, the outer shell of the actuating element and the inner shell of the actuating element, so that small negative pressure is generated in the region, located on the side, opposite to the first piston, of the inner shell of the driving device and a channel between the inner shells of the actuating element are also required to generate small negative pressure, but because the region, located on the side, opposite to the first piston, of the inner shell of the driving device and the channel between the inner shells of the actuating element are isolated from the connection between the inner shells of the actuating element and the vacuum pump by the first piston and the second piston, the negative pressure cannot be directly generated by the vacuum pump, the first air hole is designed, when the vacuum pump starts to work, the vacuum pump can suck gas in a channel formed among the driving device inner shell, the driving device outer shell, the executing part outer shell and the executing part inner shell, and the vacuum pump can also suck the gas in a channel between the driving device inner shell and the executing part inner shell in an area, on one side, opposite to the first piston, of the second piston through the first air hole, so that smaller negative pressure is generated in an area, on one side, opposite to the first piston, of the driving device inner shell and the channel between the executing part inner shells, of the driving device inner shell, and the driving device inner shell is used for adsorbing the plastic film.

The one-way valve designed by the invention has the advantages that when a larger negative pressure needs to be generated in the area of the inner shell of the driving device, which is positioned on the side of the second piston, opposite to the first piston, and in the channel between the inner shells of the actuating elements, the limiting of the second piston is triggered through the adjusting mechanism, so that the second piston rapidly slides to the side close to the first piston under the tension of the energy storage spring, the second piston plate slides to suck the gas in the area of the inner shell of the driving device, which is positioned on the side of the second piston, opposite to the first piston, and the channel between the inner shells of the actuating elements, so that the gas in the channel formed by the inner shell of the driving device, the outer shell of the actuating elements and the inner shell of the actuating elements is sucked, and the cutting of the plastic films by the actuating elements is influenced The hole is drawn away and can not draw the gas in the channel formed among the driving device inner shell, the driving device outer shell, the actuating element outer shell and the actuating element inner shell into the area of the driving device inner shell, which is positioned on the side, opposite to the first piston, of the second piston and the channel between the actuating element inner shells through the first air hole.

The shell formed by the executing part outer shell, the executing part inner shell and the annular plate is arranged on two mounting ring sleeves at one end, far away from the access pipe, of the driving device inner ring and the driving device outer ring in a buckling mode.

As a further improvement of the technology, the outer circular surfaces of the mounting shell and the driving device shell are fixedly provided with handles which are convenient for a user to hold; and a motor switch for controlling the motor to be switched on or off is arranged on the outer side of the mounting shell.

As a further improvement of the technology, a fourth limit ring for limiting the first piston is arranged on the inner circular surface of the inner shell of the driving device; the fourth limiting ring designed by the invention has the effects of limiting the first piston and limiting the limiting plate in the adjusting mechanism when the second piston plate is not triggered, and the limiting step on the limiting plate is clamped on the fourth limiting ring; the fourth limiting ring and the limiting plate limit the second piston; a first limiting ring for limiting the second piston is arranged on the inner circular surface of the inner shell of the driving device; a second limiting ring for limiting the threaded ring is arranged on the inner circular surface of the inner shell of the driving device; two third limiting rings which are used for limiting the mounting ring in a sliding manner are arranged on the inner circular surface of the inner shell of the driving device; the two third limiting rings clamp the mounting ring between the two third limiting rings, so that the mounting ring can only rotate and cannot slide along the axis of the inner shell of the driving device.

As a further improvement of the present technology, the first return spring is a compression spring, and the energy storage spring is an extension spring.

As a further improvement of the technology, a first sealing ring is arranged between the first piston and the inner circular surface of the inner shell of the driving device; the first sealing ring has the function of sealing the sliding of the first piston, so that the sealing performance of two sides of the first piston is ensured; a second sealing ring is arranged between the second piston and the inner circular surface of the inner shell of the driving device; the second sealing ring has the function of sealing the sliding of the second piston, and the sealing performance of two sides of the second piston is guaranteed.

As a further improvement of the technology, the middle of the threaded ring is provided with a connecting column through three connecting plates which are uniformly distributed in the circumferential direction; the one end of second piston is opened there is the second T-shaped groove, the one end of T shape pivot is the T shape, the one end of T shape pivot T shape is installed on the second piston through the rotatory cooperation with the second T-shaped groove, the other end fixed mounting of T shape pivot is on the spliced pole in the middle of the screw ring, the one end through T shape pivot T shape is through the rotatory cooperation with the second T-shaped groove guarantee that the second piston can pass through T shape pivot pulling thread bush slip at the slip in-process, the thread bush rotation can not influence the second piston simultaneously.

As a further improvement of the technology, the middle of the mounting ring is provided with a connecting column through three connecting plates which are uniformly distributed in the circumferential direction, and one end of the connecting column is provided with a second T-shaped groove; one end of a telescopic rotating shaft capable of transmitting torque is fixedly arranged on the connecting column, and the other end of the telescopic rotating shaft is fixedly arranged on the connecting column in the middle of the threaded ring; one end of the square shaft is fixedly provided with a T-shaped connecting shaft, the square shaft is arranged on a connecting column in the middle of the mounting ring through the rotating fit of the T-shaped connecting shaft and the second T-shaped groove, and the T-shaped rotating shaft is connected with the second T-shaped groove through a one-way clutch.

As a further improvement of the technology, the adjusting mechanism comprises a limiting plate, an adjusting rod, a limiting step, a third air hole and a second return spring, wherein one end of the adjusting rod is provided with an annular guide sleeve, and the adjusting rod is internally provided with the third air hole which is communicated up and down; the adjusting rod is slidably arranged on the driving device inner shell and the driving device outer shell, and the annular guide sleeve on the adjusting rod is positioned in the driving device inner shell; a second return spring is arranged between the upper end of the adjusting rod and the shell of the driving device; the limiting plate is provided with a limiting step, the limiting plate is slidably mounted on the annular guide groove on the adjusting rod, one end of the limiting plate with the limiting step is matched with a fourth limiting ring mounted in the inner shell of the driving device, and the other end of the limiting plate is matched with the second piston.

The elastic coefficient of the first return spring is smaller than that of the energy storage spring.

In the invention, in a normal state, the limiting step on the limiting plate is clamped on a fourth limiting ring arranged on the inner shell of the driving device, the second piston is limited by the fourth limiting ring and the limiting plate, when the limitation of the second piston needs to be relieved, the adjusting rod is pressed downwards at first, the adjusting rod drives the limiting plate to move towards the center of the inner shell of the driving device, the limiting step on the limiting plate is separated from the fourth limiting ring in the movement process of the limiting plate, the fourth limiting ring loses the limitation on the limiting plate, at the moment, the second piston slides towards one side close to the first piston under the tension of the force storage spring, and the second piston slides to push the limiting plate to slide; when the second piston resets, at first under first reset spring's effect, first piston resets, and first piston promotes the second piston through energy storage spring and resets, and first piston promotes the limiting plate and removes simultaneously, and after first piston resets completely, the limiting plate also just in time resets, and spacing step on the limiting plate just in time blocks on the fourth spacing ring once more, adjusts the pole and resets under second reset spring's effect.

When the hole opening device is used, the square hole on the connecting sleeve is clamped on the square shaft, and then the actuating piece is completely installed on the driving device.

Compared with the traditional plastic film hole opening technology, the invention has the following beneficial effects:

1. the perforating device designed by the invention is used for perforating on one side, has a simpler structure, is convenient to carry, and is suitable for perforating plastic films which are inconvenient to move or films in installation.

2. The hole punching device designed by the invention performs cutting and punching through sudden change of the suction air pressure, and the periphery of a punching area is fixed through smaller suction air pressure, so that the punching quality is higher, and the phenomena of curling and the like are not easy to cause.

3. The hole forming device comprises a driving device and an executing piece, wherein the executing piece can be replaced by different types according to the size of holes to be formed in the plastic film; the sizes of the connecting parts of the executing part inner shell and the executing part outer shell in the executing parts with various models and the driving device outer shell and the driving device inner shell in the driving device are the same, the size of the hole punched by the executing part is determined by the size of the end, far away from the driving device, of the executing part inner shell and the executing part outer shell in the executing part and the size of the annular blade, and the size of the end, far away from the driving device, of the executing part inner shell and the executing part outer shell in the executing parts with different models and the size of the annular blade are different.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

Fig. 3 is a schematic view of the driving device.

Fig. 4 is a schematic view of the inner and outer drive unit housings.

Fig. 5 is a schematic structural diagram of an inner shell of the driving device.

Fig. 6 is a schematic view of the adjustment mechanism.

FIG. 7 is a schematic view of the connection of the first piston, the second piston, the threaded ring and the mounting ring.

Fig. 8 is a schematic view of the connection of the second piston and the T-shaped rotary shaft.

FIG. 9 is a schematic view of a threaded ring and mounting ring connection.

Fig. 10 is a schematic view of a square shaft installation.

Fig. 11 is a schematic view of the actuator structure.

FIG. 12 is a schematic view of the inner and outer actuator casings.

FIG. 13 is a schematic view of a ring blade installation.

Number designation in the figures: 1. an executive component; 2. a drive device; 3. an adjustment mechanism; 4. a handle; 5. a motor switch; 6. a vacuum pump; 7. a motor; 8. mounting a shell; 9. a first piston; 10. a second piston; 11. a threaded ring; 12. a mounting ring; 13. a first limit ring; 14. a second stop collar; 15. a third limit ring; 16. installing a ring sleeve; 17. air holes; 18. a fourth limit ring; 19. a drive device housing; 20. a one-way valve; 21. a drive device inner housing; 22. connecting blocks; 23. an access pipe; 24. a connecting plate; 25. a second return spring; 26. a limiting plate; 27. adjusting a rod; 28. a limiting step; 29. a third air hole; 30. a square shaft; 31. a telescopic shaft; 32. a T-shaped rotating shaft; 33. an energy storage spring; 34. a first return spring; 35. a first seal ring; 36. a second seal ring; 37. a one-way clutch; 38. a second T-shaped slot; 41. a first T-shaped slot; 42. a T-shaped connecting shaft; 43. a stabilizing cone; 44. an executing piece inner shell; 45. an actuator housing; 46. a first rubber ring; 47. a second rubber ring; 48. a blade mounting ring; 49. an annular blade; 50. an annular conical surface; 51. positioning the air holes; 52. annular chamfering; 53. an annular plate; 54. a first friction projection; 55. a fixing ring; 56. a third seal ring; 57. connecting sleeves; 59. a second friction projection; 69. An annular chute.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, it comprises an actuating member 1 and a driving device 2, wherein as shown in fig. 2, the actuating member 1 is mounted on the driving device 2 by a snap-fit manner, and the driving device 2 provides kinetic energy for the actuating member 1; the executing piece 1 can be replaced by different types according to the size of the holes to be punched on the plastic film.

The sizes of the connecting parts of the inner executing part shell 44 and the outer executing part shell 45 of the executing part 1 of various models and the outer driving device shell 19 and the inner driving device shell 21 of the driving device 2 are the same, the size of the hole which can be punched by the executing part 1 is determined by the size of the end, far away from the driving device 2, of the inner executing part shell 44 and the outer executing part shell 45 of the executing part 1 and the size of the annular blade 49, and the size of the end, far away from the driving device 2, of the inner executing part shell 44 and the outer executing part shell 45 of the executing part 1 of different models and the size of the annular blade 49 are different.

As shown in fig. 11, the actuator 1 includes an actuator inner housing 44, an actuator outer housing 45, an annular plate 53, and an annular blade 49, wherein as shown in fig. 12, one end of the actuator inner housing 44 and the actuator outer housing 45 are fixedly connected through the annular plate 53, and two circles of positioning air holes 51 are uniformly formed in the annular plate 53 in the inner and outer circumferential directions; as shown in fig. 11 and 12, the actuating member outer shell 45 and the actuating member inner shell 44 are sequentially and circumferentially and uniformly fixedly connected through a plurality of connecting blocks 22 along the axial direction of the actuating member outer shell 45; the actuator inner shell 44 and the actuator outer shell 45 are fixed together through the connecting blocks 22 which are uniformly distributed in the circumferential direction, so that the stability between the actuator inner shell and the actuator outer shell is improved; meanwhile, the connecting blocks 22 in the same circumferential direction have larger gaps, so that the connecting blocks 22 cannot block an annular channel formed between the actuating member outer shell 45 and the actuating member inner shell 44; the positioning air hole 51 has the function that when the punching position is positioned, a smaller negative pressure is formed in the positioning air hole 51 firstly through the vacuum pump 6, the positioned plastic film is adsorbed and fixed, and a certain stable positioning effect is achieved in the cutting process; as shown in fig. 13, one end of the blade mounting ring 48 is fixedly provided with a connecting sleeve 57 through three connecting plates which are uniformly distributed in the circumferential direction, the blade mounting ring 48 is connected with the driving device 2 through the connecting sleeve 57, when the square shaft 30 in the driving device 2 is driven to rotate, the square shaft 30 drives the connecting sleeve 57 to rotate, and the connecting sleeve 57 drives the blade mounting ring 48 to rotate; one end of the annular blade 49 is provided with saw teeth which are used for improving the cutting effect of the annular blade 49 on the plastic film in the rotating process; the other end of the annular blade 49 is fixedly arranged on the blade mounting ring 48, the inner side of the annular blade 49 is provided with a fixing ring 55 through three connecting rods which are uniformly distributed in the circumferential direction, the stabilizing cone 43 is provided with an annular sliding groove 69, and the stabilizing cone 43 is arranged in the middle of the annular blade 49 through the rotating fit of the annular sliding groove 69 and the fixing ring 55; the connecting sleeve 57 rotates to drive the blade mounting ring 48 to rotate, and the blade mounting ring 48 rotates to drive the annular blade 49 to rotate; the stabilization cone 43 serves to increase the stability of the plastic film during the cutting process.

The driving device 2 is provided with a vacuum pump 6 and an adjusting mechanism 3, and the vacuum pump 6 is controlled by a motor 7 to generate negative pressure, so that the vacuum pump 6 works to generate negative pressure on the actuating element 1; the negative pressure surge of the control actuator inner shell 44 can be adjusted through the adjusting mechanism 3; the driving device 2 controls the annular blade 49 to rotate; in the initial positioning stage, the vacuum pump 6 works to generate negative pressure in the executing part inner shell 44, the executing part outer shell 45, the shell consisting of the annular plate 53 and the executing part inner shell 44, and the negative pressure can adsorb the positioned plastic film on the executing part 1; then, the negative pressure in the actuator inner shell 44 in the actuator 1 is suddenly increased through the adjustment of the adjusting mechanism 3, and the plastic film is cut through the high-intensity negative pressure and the rotating blade.

As shown in fig. 12, a first rubber ring 46 is installed at one end of the actuator outer shell 45 away from the annular plate 53, and a second rubber ring 47 is installed at one end of the actuator inner shell 44 away from the annular plate 53; the first rubber ring 46 and the second rubber ring 47 serve to ensure the stability of the actuator outer shell 45, the actuator inner shell 44, the drive outer shell 19 and the drive inner shell 21 after installation.

As shown in fig. 12, the actuator inner shell 44, the actuator outer shell 45 and the annular plate 53 form an annular shell, one end of the shell is mounted on the driving device 2 by a snap-fit manner, and two circles of positioning air holes 51 are uniformly formed in the end surface of the other end of the shell in the inner and outer circumferential directions; the inner circular surface of the actuating member 1 close to one end of the annular plate 53 is provided with an annular conical surface 50, and the annular conical surface 50 is uniformly provided with a plurality of second friction protrusions 59 in the circumferential direction; all the positioning air holes 51 formed in the annular plate 53 are provided with annular chamfers 52, and the annular chamfers 52 are provided with first friction bulges 54 which are uniformly distributed in the circumferential direction; the first friction protrusion 54 and the second friction protrusion 59 function to ensure stability of the plastic film during the cutting process by friction.

As shown in fig. 3, the driving device 2 includes an adjusting mechanism 3, a vacuum pump 6, a motor 7, a mounting case 8, a first piston 9, a second piston 10, a threaded ring 11, a mounting ring 12, a driving device outer case 19, a driving device inner case 21, a square shaft 30, a first return spring 34, and an energy storage spring 33, wherein as shown in fig. 4, an access pipe 23 is fixedly mounted at one end of the driving device outer case 19; one end of the driving device inner shell 21 is fixedly installed on the access pipe 23 through three connecting plates 24 which are uniformly distributed in the circumferential direction, and as shown in fig. 5, the driving device inner shell 21 and the driving device outer shell 19 are sequentially and uniformly connected with each other in the circumferential direction along the axial direction of the driving device outer shell 19 through a plurality of connecting blocks 22; an annular channel is formed between the outer shell 19 of the driving device and the inner shell 21 of the driving device, the channel is communicated with the access pipe 23 and the inner shell 21 of the driving device, and the communication area is an arc-shaped clearance area formed between the three connecting plates 24; the driving device inner shell 21 and the driving device outer shell 19 are fixed together through connecting blocks 22 which are uniformly distributed in the circumferential direction, so that the stability between the driving device inner shell 21 and the driving device outer shell 19 is improved; meanwhile, the connecting blocks 22 in the same circumferential direction have larger gaps, so that the connecting blocks 22 cannot block an annular channel formed between the outer shell 19 of the driving device and the inner shell 21 of the driving device; the inner circumferential surface of the driving device inner shell 21 is provided with a section of internal thread; the ends of the driving device inner shell 21 and the driving device outer shell 19 far away from the access pipe 23 are provided with two mounting ring sleeves 16 which are distributed inside and outside; the installation ring sleeves 16 are used for conveniently installing the executing piece 1, when the executing piece 1 is installed, the ends of the executing piece outer shell 45 and the executing piece inner shell 44 which are not fixedly connected in the executing piece 1 are nested and installed in the two installation ring sleeves 16 of the driving device inner shell 21 and the driving device outer shell 19, and the connecting parts are fixed through buckles; the buckle can be realized by the prior art; an annular channel is formed between the driving device outer shell 19 and the driving device inner shell 21 and is communicated with the access pipe 23; one end of the mounting shell 8 is fixedly mounted at one end of the driving device shell 19 with the access pipe 23; the motor 7 and the vacuum pump 6 are respectively and fixedly installed in the installation shell 8, the input end of the vacuum pump 6 is connected with the motor 7, and the output end of the vacuum pump 6 is connected with the access pipe 23; as shown in fig. 3 and 7, the first piston 9 is slidably mounted in the driving device inner casing 21, and a first return spring 34 is mounted between the first piston 9 and an end surface of the driving device inner casing 21 near one end of the access pipe 23; the first return spring 34 is used for returning the first piston 9; the second piston 10 is slidably arranged in the driving device inner shell 21, and an energy storage spring 33 is arranged between the second piston 10 and the first piston 9; the energy storage spring 33 is used for stretching and storing force when the first piston 9 slides towards the side where the motor 7 is installed relative to the second piston 10 and the second piston 10 is limited by the adjusting structure; when the adjusting mechanism 3 is triggered to lose the limit of the second piston 10, the second piston 10 can rapidly slide to one side close to the first piston 9 under the tension of the energy storage spring 33; the threaded ring 11 is installed in the driving device inner shell 21 through thread matching with internal threads on the inner circular surface of the driving device inner shell 21, a T-shaped rotating shaft 32 is installed between the threaded ring 11 and the second piston 10, one end of the T-shaped rotating shaft 32 is fixedly installed on the threaded ring 11, and the other end of the T-shaped rotating shaft 32 is rotatably installed on the second piston 10; when the second piston 10 slides towards the side close to the first piston 9 under the pulling force of the force storage spring, the second piston 10 can pull the threaded sleeve to slide along the axis of the driving device inner shell 21 through the T-shaped rotating shaft 32, and as the threaded ring 11 is in threaded fit with the driving device inner shell 21, and the thread pitch of the internal threads on the inner circular surfaces of the threaded sleeve and the driving device inner shell 21 is larger, when the threaded ring 11 slides along the axis of the driving device inner shell 21, the threaded ring 11 can be driven to rotate, namely, the threaded ring 11 can rotate while sliding; the mounting ring 12 is rotatably mounted on the inner circular surface of the driving device inner shell 21, and the mounting ring 12 is in transmission connection with the threaded ring 11 through a telescopic shaft 31; the square shaft 30 is rotatably mounted on the mounting ring 12 by a one-way clutch 37; when the threaded ring 11 rotates, the mounting ring 12 is driven to rotate by the telescopic shaft 31; the mounting ring 12 rotates to drive the square shaft 30 to rotate through the one-way clutch 37, the one-way clutch 37 designed by the invention is an overrunning clutch, and after the threaded ring 11 stops rotating, the square shaft 30 can also automatically rotate for a certain angle due to the action of the overrunning clutch; the adjusting mechanism 3 for controlling whether the second piston 10 can slide is mounted on the driving device outer shell 19 and the driving device inner shell 21.

As shown in fig. 4, a plurality of first air holes 17 are uniformly formed in the circumferential direction on the outer circumferential surface of the inner housing 21 of the driving device between the second piston 10 and the threaded sleeve, and a check valve 20 is installed in each first air hole 17.

In the invention, after the actuating element 1 is installed, a channel formed by the outer shell 19 of the driving device and the inner shell 21 of the driving device and a channel formed between the inner shell 44 of the actuating element and the outer shell 45 of the actuating element are communicated, and a channel formed between the inner shell 21 of the driving device and the inner shell 44 of the actuating element in the area of the second piston 10 on the side opposite to the first piston 9 is also communicated; in order to realize that when the cutting is started, the actuating element 1 generates relatively small suction pressure on the plastic film, so when the vacuum pump 6 starts to work, the first piston 9 is driven to slide towards the side where the motor 7 is installed, the vacuum pump 6 sucks the gas in a channel formed among the driving device inner shell 21, the driving device outer shell 19, the actuating element outer shell 45 and the actuating element inner shell 44, so that small negative pressure is generated in the region, the driving device inner shell 21 is positioned in the region, on the side, opposite to the first piston 9, of the second piston 10, and the channel between the actuating element inner shell 44 is also required to generate small negative pressure, but because the channel between the region, on the side, opposite to the first piston 9, of the driving device inner shell 21 and the actuating element inner shell 44 is isolated from the connection of the vacuum pump 6 by the first piston 9 and the second piston 10, the negative pressure cannot be directly generated by the vacuum pump 6, therefore, the present invention provides the first air vent 17, when the vacuum pump 6 starts to work, the vacuum pump 6 will suck the air in the channel formed between the driving device inner shell 21, the driving device outer shell 19, the actuating member outer shell 45 and the actuating member inner shell 44, and through the first air vent 17, the vacuum pump 6 can also suck the air in the channel between the actuating member inner shell 44 and the area of the driving device inner shell 21 located at the side of the second piston 10 opposite to the first piston 9, so that a small negative pressure is generated in the channel between the actuating member inner shell 44 and the area of the driving device inner shell 21 located at the side of the second piston 10 opposite to the first piston 9, and the plastic film is adsorbed.

The one-way valve 20 of the present invention is designed to have the function that when a larger negative pressure needs to be generated in the area of the driving device inner casing 21 located on the side of the second piston 10 opposite to the first piston 9 and in the channel between the actuating element inner casings 44, the limit position of the second piston 10 is triggered by the adjusting mechanism 3, so that the second piston 10 rapidly slides towards the side close to the first piston 9 under the pulling force of the energy storage spring 33, and the sliding of the second piston 10 plate will suck the gas in the channel between the area of the driving device inner casing 21 located on the side of the second piston 10 opposite to the first piston 9 and the actuating element inner casings 44 to generate the larger negative pressure, but in order to prevent the second piston 10 from sucking the gas in the channel formed between the driving device inner casing 21, the driving device outer casing 19, the actuating element outer casing 45 and the actuating element inner casings 44 during the sucking process to affect the cutting of the actuating element 1 on the plastic film, so the one-way valve 20 of, the gas in the channel between the drive inner housing 21 and the actuator inner housing 44 in the region of the second piston 10 on the side facing away from the first piston 9 can only be removed via the first gas opening 17, but cannot be drawn via the first gas opening 17 into the channel between the drive inner housing 21 and the actuator inner housing 44 in the region of the second piston 10 on the side facing away from the first piston 9 and the actuator inner housing 44.

The housing formed by the outer actuator casing 45, the inner actuator casing 44 and the annular plate 53 is snap-fitted to the two fitting rings 16 at the end of the inner ring of the drive unit 2 and the outer ring of the drive unit 2 remote from the access tube 23.

As shown in fig. 1, the outer circumferential surfaces of the mounting shell 8 and the driving device housing 19 are fixedly provided with a handle 4, and the handle 4 is convenient for a user to hold; the outer side of the mounting shell 8 is provided with a motor switch 5 for controlling the motor switch 5.

As shown in fig. 4, a fourth limiting ring 18 for limiting the first piston 9 is mounted on the inner circumferential surface of the inner housing 21 of the driving device; the fourth limit ring 18 designed by the invention has the function of limiting the first piston 9, and simultaneously has the function of limiting the limit plate 26 in the adjusting mechanism 3 when the second piston 10 plate is not triggered, and the limit step 28 on the limit plate 26 is clamped on the fourth limit ring 18; the fourth limiting ring 18 and the limiting plate 26 limit the second piston 10; a first limiting ring 13 for limiting the second piston 10 is arranged on the inner circular surface of the driving device inner shell 21; a second limiting ring 14 for limiting the threaded ring 11 is arranged on the inner circular surface of the driving device inner shell 21; two third limiting rings 15 which can limit the sliding of the mounting ring 12 are arranged on the inner circular surface of the driving device inner shell 21; the two third stop rings 15 clamp the mounting ring 12 therebetween, so that the mounting ring 12 can only rotate and cannot slide along the axis of the inner housing 21 of the driving device.

The first return spring 34 is a compression spring, and the energy storage spring 33 is an extension spring.

As shown in fig. 7, a first seal ring 35 is installed between the first piston 9 and the inner circumferential surface of the driving device inner casing 21; the first sealing ring 35 is used for sealing the sliding of the first piston 9, so that the sealing performance of two sides of the first piston 9 is ensured; a second sealing ring 36 is arranged between the second piston 10 and the inner circular surface of the driving device inner shell 21; the second sealing ring 36 is used for sealing the sliding of the second piston 10, and ensuring the sealing performance on both sides of the second piston 10.

As shown in fig. 9, a connecting column is installed in the middle of the threaded ring 11 through three connecting plates which are uniformly distributed in the circumferential direction; as shown in fig. 8, one end of the second piston 10 is provided with a second T-shaped groove 38, one end of the T-shaped rotating shaft 32 is T-shaped, one end of the T-shaped rotating shaft 32T is mounted on the second piston 10 through rotating matching with the second T-shaped groove 38, the other end of the T-shaped rotating shaft 32 is fixedly mounted on a connecting column in the middle of the threaded ring 11, and the one end of the T-shaped rotating shaft 32T is matched with the second T-shaped groove 38 through rotating to ensure that the second piston 10 can pull the threaded sleeve to slide through the T-shaped rotating shaft 32 in the sliding process, and meanwhile, the threaded sleeve does not influence the second piston 10 due to rotation.

As shown in fig. 10, a connecting column is installed in the middle of the mounting ring 12 through three connecting plates uniformly distributed in the circumferential direction, and a second T-shaped groove 38 is formed at one end of the connecting column; one end of a telescopic rotating shaft capable of transmitting torque is fixedly arranged on the connecting column, and the other end of the telescopic rotating shaft is fixedly arranged on the connecting column in the middle of the threaded ring 11; one end of the square shaft 30 is fixedly provided with a T-shaped connecting shaft 42, the square shaft 30 is arranged on a connecting column in the middle of the mounting ring 12 through the rotating matching of the T-shaped connecting shaft 42 and the second T-shaped groove 38, and the T-shaped rotating shaft 32 is connected with the second T-shaped ring through a one-way clutch 37.

As shown in fig. 6, the adjusting mechanism 3 includes a limiting plate 26, an adjusting rod 27, a limiting step 28, a third air hole 29, and a second return spring 25, wherein one end of the adjusting rod 27 has an annular guide sleeve, and the adjusting rod 27 has a vertically-communicated third air hole 29 therein; the adjusting rod 27 is slidably mounted on the driving device inner shell 21 and the driving device outer shell 19, and the annular guide sleeve on the adjusting rod 27 is positioned in the driving device inner shell 21; a second return spring 25 is arranged between the upper end of the adjusting rod 27 and the driving device shell 19; the limit plate 26 is provided with a limit step 28, the limit plate 26 is slidably mounted on the annular guide groove of the adjusting rod 27, one end of the limit plate 26 with the limit step 28 is matched with the fourth limit ring 18 mounted in the inner shell 21 of the driving device, and the other end of the limit plate 26 is matched with the second piston 10.

The elastic coefficient of the first return spring 34 is smaller than that of the power spring 33.

In the invention, in a normal state, the limiting step 28 on the limiting plate 26 is clamped on the fourth limiting ring 18 arranged on the driving device inner shell 21, the second piston 10 is limited by the fourth limiting ring 18 and the limiting plate 26, when the limitation of the second piston 10 needs to be relieved, the adjusting rod 27 is pressed downwards at first, the adjusting rod 27 drives the limiting plate 26 to move towards the center of the driving device inner shell 21, the limiting step 28 on the limiting plate 26 can be separated from the fourth limiting ring 18 in the movement process of the limiting plate 26, the fourth limiting ring 18 loses the limitation on the limiting plate 26, at the moment, the second piston 10 can slide towards one side close to the first piston 9 under the pulling force of the force storage spring, and the second piston 10 can slide to push the limiting plate 26 to slide; when the second piston 10 is reset, firstly, under the action of the first reset spring 34, the first piston 9 is reset, the first piston 9 pushes the second piston 10 to reset through the energy storage spring 33, meanwhile, the first piston 9 pushes the limit plate 26 to move, after the first piston 9 is completely reset, the limit plate 26 is also just reset, the limit step 28 on the limit plate 26 is just clamped on the fourth limit ring 18 again, and the adjusting rod 27 is reset under the action of the second reset spring 25.

When the tapping device used in the invention is used, the square hole on the connecting sleeve 57 is firstly clamped on the square shaft 30, and then the actuating member 1 is completely installed on the driving device 2.

The specific working process is as follows: when the tapping device designed by the invention is used, the actuating member 1 with a proper size is selected according to requirements, and then the actuating member 1 is installed.

When the actuating element 1 is installed, firstly, a square hole on a connecting sleeve 57 in the actuating element 1 is clamped in a square shaft 30 of a driving device 2, then the actuating element 1 is pressed, one ends of an actuating element outer shell 45 and an actuating element inner shell 44 in the actuating element 1, which are not fixedly connected, are nested and installed in two installation ring sleeves 16 of a driving device inner shell 21 and a driving device outer shell 19, and the connecting parts are fixed through buckles; the passage formed by the drive housing 19 and the drive housing 21 is open to the passage formed between the actuator inner housing 44 and the actuator outer housing 45, as is the passage formed between the drive housing 21 and the actuator inner housing 44 in the region of the second piston 10 on the side facing away from the first piston 9.

When the actuator 1 is installed, firstly, the motor switch 5 is turned on, the motor 7 works, the motor 7 drives the vacuum pump 6 to work, the vacuum pump 6 exhausts air, the first piston 9 is driven to slide towards one side of the motor 7, the vacuum pump 6 sucks air in a channel formed among the driving device inner shell 21, the driving device outer shell 19, the actuator outer shell 45 and the actuator inner shell 44, so that small negative pressure is generated in the region, the channel between the driving device inner shell 21 and the actuator inner shell 44 is positioned in the region, on the side, opposite to the first piston 9, of the second piston 10, and the channel between the driving device inner shell 44 also generates small negative pressure through the first air hole 17 formed in the driving device inner shell 21; then pressing the executive component 1 on the designated punching position; the plastic film is sucked by the positioning hole on the annular plate 53 connected between the actuator inner shell 44 and the actuator outer shell 45 and the negative pressure in the arc-shaped channel between the actuator inner shell 44 and the stabilizing cone 43.

Then the adjusting rod 27 is pressed downwards, the adjusting rod 27 drives the limiting plate 26 to move towards the center of the driving device inner shell 21, the limiting step 28 on the limiting plate 26 is separated from the fourth limiting ring 18 in the moving process of the limiting plate 26, the fourth limiting ring 18 loses the limitation on the limiting plate 26, at the moment, the second piston 10 slides towards one side close to the first piston 9 under the tension of the force storage spring, and the second piston 10 slides to push the limiting plate 26 to slide; in the invention, when the second piston 10 is triggered to slide towards the side close to the first piston 9, a larger negative pressure is generated in a channel between the driving device inner shell 21 and the actuating element inner shell 44, meanwhile, the second piston 10 can pull the threaded sleeve to slide along the axis of the driving device inner shell 21 through the T-shaped rotating shaft 32, and the threaded ring 11 slides and rotates, namely the threaded ring 11 rotates while sliding; when the threaded ring 11 rotates, the mounting ring 12 is driven to rotate by the telescopic shaft 31; the mounting ring 12 rotates to drive the square shaft 30 to rotate through the one-way clutch 37, the square shaft 30 drives the blade mounting ring 48 to rotate through the connecting sleeve 57, and the blade mounting ring 48 rotates to drive the annular blade 49 to rotate; the annular blade 49 is contacted with the plastic film for rotary cutting; meanwhile, the cut area can be cut off rapidly under a large negative pressure and cut off; after the cutting is finished, the motor 7 stops working, the vacuum pump 6 stops working, negative pressure in a channel between the driving device inner shell 21 and the executing part inner shell 44 and a channel formed between the driving device inner shell 21, the driving device outer shell 19, the executing part outer shell 45 and the executing part inner shell 44 disappears, and the first piston 9, the second piston 10, the threaded sleeve and the annular blade 49 are all reset.

Claims

1. A plastic film single-sided hole opener characterized in that: the device comprises an executing part and a driving device, wherein the executing part is arranged on the driving device in a buckling mode, and the driving device provides kinetic energy for the executing part; the executing piece can be replaced by different types according to the size of the hole to be punched on the plastic film;

the executing part comprises an executing part inner shell, an executing part outer shell, an annular plate and an annular blade, wherein one end of the executing part outer shell and one end of the executing part inner shell are fixedly connected through the annular plate, and two circles of positioning air holes are uniformly formed in the annular plate in the inner circumferential direction and the outer circumferential direction; the executing part outer shell and the executing part inner shell are sequentially and circumferentially and uniformly fixedly connected through a plurality of connecting blocks along the axial direction of the executing part outer shell; one end of the blade mounting ring is fixedly provided with a connecting sleeve through three connecting plates which are uniformly distributed in the circumferential direction, the blade mounting ring is connected with the driving device through the connecting sleeve, one end of the annular blade is provided with sawteeth, the other end of the annular blade is fixedly arranged on the blade mounting ring, the inner side of the annular blade is provided with a fixing ring through three connecting rods which are uniformly distributed in the circumferential direction, an annular sliding groove is formed in the stable cone, and the stable cone is arranged in the middle of the annular blade through the rotating matching of the annular sliding groove and the fixing ring;

2. A plastic film single-sided hole cutter as claimed in claim 1, wherein: a first rubber ring is arranged at one end of the executing part outer shell, which is far away from the annular plate, and a second rubber ring is arranged at one end of the executing part inner shell, which is far away from the annular plate;

the executing part inner shell, the executing part outer shell and the annular plate form an annular shell, one end of the shell is arranged on the driving device in a buckling mode, and two circles of positioning air holes are uniformly formed in the inner and outer circumferential directions on the end face of the other end of the shell; the inner circular surface of the executing piece close to one end of the annular plate is provided with an annular conical surface, and the annular conical surface is uniformly provided with a plurality of second friction bulges in the circumferential direction; all the positioning air holes formed in the annular plate are provided with annular chamfers, and the annular chamfers are provided with first friction bulges which are uniformly distributed in the circumferential direction.

3. A plastic film single-sided hole cutter as claimed in claim 1, wherein: the driving device comprises an adjusting mechanism, a vacuum pump, a motor, an installation shell, a first piston, a second piston, a threaded ring, an installation ring, a driving device outer shell, a driving device inner shell, a square shaft, a first return spring and an energy storage spring, wherein an access pipe is fixedly installed at one end of the driving device outer shell; one end of the driving device inner shell is fixedly arranged on the access pipe through three connecting plates which are uniformly distributed in the circumferential direction, and the driving device inner shell and the driving device outer shell are sequentially and uniformly connected with each other through a plurality of connecting blocks in the circumferential direction along the axis direction of the driving device outer shell; the inner circular surface of the driving device inner shell is provided with a section of internal thread; two mounting ring sleeves which are distributed inside and outside are arranged at one ends of the driving device inner shell and the driving device outer shell, which are far away from the access pipe; an annular channel is formed between the outer shell of the driving device and the inner shell of the driving device and is communicated with the access pipe; one end of the mounting shell is fixedly mounted at one end of the driving device shell, which is provided with the access pipe; the motor and the vacuum pump are respectively and fixedly arranged in the mounting shell, the power input end of the vacuum pump is connected with the motor, and the suction end of the vacuum pump is connected with the access pipe; the first piston is slidably arranged in the driving device inner shell, and a first return spring is arranged between the first piston and the end face of the driving device inner shell, which is close to one end of the access pipe; the second piston is slidably arranged in the driving device inner shell, and an energy storage spring is arranged between the second piston and the first piston; the threaded ring is installed in the inner shell of the driving device through matching with threads of internal threads on the inner circular surface of the inner shell of the driving device, a T-shaped rotating shaft is installed between the threaded ring and the second piston, one end of the T-shaped rotating shaft is fixedly installed on the threaded ring, and the other end of the T-shaped rotating shaft is rotatably installed on the second piston; the mounting ring is rotatably mounted on the inner circular surface of the inner shell of the driving device, and the mounting ring is in transmission connection with the threaded ring through a telescopic shaft; the square shaft is rotatably arranged on the mounting ring through a one-way clutch; the outer shell of the driving device and the inner shell of the driving device are provided with an adjusting mechanism for controlling the second piston to slide or not;

a plurality of first air holes are uniformly formed in the circumferential direction on the outer circular surface of the inner shell of the driving device, which is positioned between the second piston and the threaded sleeve, and a one-way valve is installed in each first air hole;

4. A plastic film single-sided hole cutter as claimed in claim 3, wherein: the outer circular surfaces of the mounting shell and the driving device shell are fixedly provided with handles, and the outer side of the mounting shell is provided with a motor switch for controlling the motor to be switched on or off.

5. A plastic film single-sided hole cutter as claimed in claim 3, wherein: a fourth limiting ring for limiting the first piston is arranged on the inner circular surface of the inner shell of the driving device; a first limiting ring for limiting the second piston is arranged on the inner circular surface of the inner shell of the driving device; a second limiting ring for limiting the threaded ring is arranged on the inner circular surface of the inner shell of the driving device; two third limiting rings which are used for limiting the installation rings in a sliding mode are installed on the inner circular surface of the inner shell of the driving device.

6. A plastic film single-sided hole cutter as claimed in claim 3, wherein: the first return spring is a compression spring, and the energy storage spring is an extension spring.

7. A plastic film single-sided hole cutter as claimed in claim 3, wherein: a first sealing ring is arranged between the first piston and the inner circular surface of the inner shell of the driving device; and a second sealing ring is arranged between the second piston and the inner circular surface of the inner shell of the driving device.

8. A plastic film single-sided hole cutter as claimed in claim 3, wherein: the middle of the threaded ring is provided with a connecting column through three connecting plates which are uniformly distributed in the circumferential direction; and a second T-shaped groove is formed in one end of the second piston, one end of the T-shaped rotating shaft is T-shaped, one end of the T-shaped rotating shaft is arranged on the second piston in a rotating fit mode with the second T-shaped groove, and the other end of the T-shaped rotating shaft is fixedly arranged on a connecting column in the middle of the threaded ring.

9. A plastic film single-sided hole cutter as claimed in claim 8, wherein: a connecting column is arranged in the middle of the mounting ring through three connecting plates which are uniformly distributed in the circumferential direction, and a second T-shaped groove is formed in one end of the connecting column; one end of a telescopic rotating shaft capable of transmitting torque is fixedly arranged on the connecting column, and the other end of the telescopic rotating shaft is fixedly arranged on the connecting column in the middle of the threaded ring; one end of the square shaft is fixedly provided with a T-shaped connecting shaft, the square shaft is arranged on a connecting column in the middle of the mounting ring through the rotating fit of the T-shaped connecting shaft and the second T-shaped groove, and the T-shaped rotating shaft is connected with the second T-shaped groove through a one-way clutch.

10. A plastic film single-sided hole cutter as claimed in claim 3, wherein: the adjusting mechanism comprises a limiting plate, an adjusting rod, a limiting step, a third air hole and a second return spring, wherein one end of the adjusting rod is provided with an annular guide sleeve, and the adjusting rod is internally provided with the third air hole which is communicated up and down; the adjusting rod is slidably arranged on the driving device inner shell and the driving device outer shell, and the annular guide sleeve on the adjusting rod is positioned in the driving device inner shell; a second return spring is arranged between the upper end of the adjusting rod and the shell of the driving device; the limiting plate is provided with a limiting step, the limiting plate is slidably mounted on the annular guide groove on the adjusting rod, one end of the limiting plate with the limiting step is matched with a fourth limiting ring mounted in the inner shell of the driving device, and the other end of the limiting plate is matched with the second piston.