Film cutting machine for food packaging carton

Abstract

The film cutting machine for the food packaging carton does not need to be operated through a tool, is small in disassembly difficulty, can improve the convenience of taking down a cutter from a fixing pin, and comprises a film cutting machine workbench, a cutter holder arranged on the film cutting machine workbench and the cutter with the tail end movably connected to the cutter holder through a pin shaft. A penetrating hole is formed in the position, located on the front end face of the cutter, of the long buckle, a communicating hole communicating with the penetrating hole is formed in the front end of the cutter, a connecting rod is arranged between the long buckle and the cutter and located in the penetrating hole and the communicating hole, a limiting plate is arranged at one end of the connecting rod, and a sliding sleeve is slidably arranged at the other end of the connecting rod. Two T-shaped open grooves are symmetrically formed in the other end of the connecting rod, two T-shaped rods used for being in sliding fit with the matched open grooves are arranged on the sliding sleeve, lifting penetrating holes are formed in the positions, located on the outer sides of the T-shaped rods, of the sliding sleeve, and fixing pieces are arranged between the matched rods and the sliding sleeve and located in the lifting penetrating holes.

Description

Technical Field

[0001] The utility model relates to the technical field of film cutting machines, and particularly relates to a film cutting machine for food packaging cartons. Background Art

[0002] In recent years, with the progress of the times and the development of technology, food packaging carton products have gradually entered people's lives. Since food packaging carton products have no adverse effects on people's physical health, and at the same time provide convenience for people's daily lives, they can be supplied to the market for people to use, improving the antibacterial property of food packaging.

[0003] Briefly speaking, a carton die-cutting machine is a machine used for die-cutting cardboard in the carton forming process. Generally, it is divided into two die-cutting forms: flat-bed die-cutting and rotary die-cutting. With the development that the outer packaging is not only used for transportation but also more for attracting consumers' purchase needs, the market share it occupies has correspondingly increased. Whether it is a flat-bed die-cutting machine or a rotary die-cutting machine, peripheral equipment is required, such as a pre-feeding machine, a cardboard stacking and separating device, a stacker, and a cardboard small bundle handling device, to ensure the maximum production efficiency of the die-cutting process.

[0004] Chinese Patent No. CN202222920047.2 discloses a fully automatic film cutting machine for conveniently adjusting the size of a carton, which includes a film cutting machine workbench. One side of the top surface of the film cutting machine workbench is provided with scales, and a knife groove is provided at the front end of the top surface of the film cutting machine workbench. The knife groove is fitted with a cutting knife. The tail end of the cutting knife is movably connected to the knife seat through a pin shaft. The front end of the cutting knife and a counterweight are both movably connected to both ends of a long buckle through fixed pins. The counterweight is connected to a motor seat, and a first motor is fixed on one side of the motor seat. The motor seat is fixed on one side of the front end of the top surface of the film cutting machine workbench, and an adjusting device is provided on the top surface of the film cutting machine workbench. This fully automatic film cutting machine for conveniently adjusting the size of a carton can perform fully automatic cutting with adjustable size for the carton through the adjusting device.

[0005] Although the above patent can solve corresponding technical problems, there are still certain defects:

[0006] When it is necessary to remove the cutting knife from the long buckle for maintenance or replacement of the cutting knife, since the front end of the cutting knife is movably connected to the long buckle through a fixed pin, and the disassembly of the fixed pin usually requires the assistance of tools and is difficult to operate, the convenience of removing the cutting knife from the fixed pin cannot be improved. Utility Model Content

[0007] The purpose of the present utility model is to provide a film cutting machine for food packaging cartons that does not require tool operation, has a small disassembly difficulty, and can improve the convenience of removing the cutting knife from the fixed pin in view of the defects and deficiencies of the prior art.

[0008] To achieve the above object, the present utility model adopts the following technical solutions: A film cutting machine for food packaging cartons, comprising a film cutting machine workbench, a tool holder arranged on the film cutting machine workbench, a cutting knife whose tail end is movably connected to the tool holder through a pin shaft, a motor base arranged on the workbench, a motor arranged on the motor base, a counterweight block arranged on the motor, a long buckle hinged to one end of the counterweight block, the front end of the cutting knife is hinged to the long buckle, a through hole is opened on the front end face of the long buckle where the cutting knife is located, a communication hole communicating with the through hole is opened at the front end of the cutting knife, a connecting rod is arranged in the through hole and the communication hole between the long buckle and the cutting knife, the connecting rod is in clearance fit with the through hole and the communication hole respectively, one end of the connecting rod passes through the through hole and is located outside the long buckle, the other end of the connecting rod passes through the communication hole and is located outside the cutting knife, a limiting plate is arranged at one end of the connecting rod, a sliding sleeve is slidably arranged at the other end of the connecting rod, the sliding sleeve is used to slide at the other end of the connecting rod when driven by an external force, two T-shaped slots are symmetrically opened at the other end of the connecting rod, two T-shaped rods for sliding cooperation with the T-shaped slots are arranged on the sliding sleeve, lifting through holes are opened on the sliding sleeve outside each T-shaped rod, the T-shaped rods can be lifted and lowered in the lifting through holes, and a fixing member for fixing or releasing the fixing of the sliding sleeve on the connecting rod so that the sliding sleeve limits one side of the cutting knife is arranged in the lifting through hole between the T-shaped rod and the sliding sleeve, and the T-shaped slots are arranged along the length direction of the connecting rod.

[0009] A further improvement is that: the fixing member includes a limiting ring groove opened on the sliding sleeve and communicating with the lifting through hole, the limiting ring groove is located on the outer peripheral side of each T-shaped rod, a limiting ring plate is fixedly arranged on the peripheral side of the T-shaped rod, the limiting ring plate can be lifted and lowered in the limiting ring groove, at least two tension springs are arranged in the limiting ring groove between the limiting ring plate and the sliding sleeve, a driving rod is arranged on each T-shaped rod in the lifting through hole, the end face of the driving rod away from the connecting rod, the driving rod passes through the lifting through hole and is located outside the sliding sleeve, and a driving disc is arranged on the driving rod, and the driving disc is located outside the sliding sleeve.

[0010] A further improvement is that: the fixing member includes an internal thread surface arranged in the lifting through hole on the sliding sleeve, each T-shaped rod is in threaded fit with the internal thread surface, a driving rod is arranged on each T-shaped rod in the lifting through hole, the end face of the driving rod away from the connecting rod, the driving rod passes through the lifting through hole and is located outside the sliding sleeve, and a driving disc is arranged on the driving rod, and the driving disc is located outside the sliding sleeve.

[0011] Further improvement is that: an anti-slip layer for increasing the friction between the T-shaped rod and the connecting rod is arranged on the end face of the T-shaped rod close to the sliding sleeve, and a plurality of anti-slip bumps are arranged on the anti-slip layer.

[0012] Further improvement is that: the anti-slip layer is a rubber layer.

[0013] Further improvement is that: a friction reducing device for reducing the friction between the sliding sleeve and the side end face of the cutter is arranged on the end face of the sliding sleeve close to the cutter.

[0014] Further improvement is that: the friction reducing device includes a mounting ball groove opened on the end face of the sliding sleeve close to the cutter, and a ball arranged in the mounting ball groove on the sliding sleeve.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are as follows: when it is necessary to remove the cutter from the long buckle for maintenance or replacement of the cutter, by keeping the driving disc pressed by hand, the driving rod drives the T-shaped rod to descend in the lifting through hole, so that the T-shaped rod no longer abuts against the connecting rod in the T-shaped slot, thereby releasing the fixing of the sliding sleeve on the connecting rod. At this time, pulling the sliding sleeve out from the other end of the connecting rod can pull the limiting plate outwards to drive the connecting rod out of the through hole and the communication hole, without the need for tool operation, and the disassembly difficulty is small, which can improve the convenience of removing the cutter from the fixing pin.

[0016] Further effect: when it is necessary to install the cutter on the long buckle, pass the connecting rod through the through hole and the communication hole, and make the limiting plate abut against one side face of the long buckle. At this time, continuously press the driving disc by hand to drive the T-shaped rod to descend in the lifting through hole, align the T-shaped rod on the sliding sleeve with the T-shaped slot, and then push the sliding sleeve towards the cutter direction to make the sliding sleeve approach the cutter end on the other end of the connecting rod. After the sliding sleeve abuts against one side face of the cutter, remove the pressing of the driving disc by hand, and the tension spring drives the T-shaped rod to ascend in the lifting through hole, and makes the T-shaped rod abut against the T-shaped opening, thereby preventing the T-shaped rod from sliding in the T-shaped opening, so as to fix the sliding sleeve on the connecting rod. The sliding sleeve limits one side of the cutter, so as to limit the cutter on the long buckle through the cooperation of the limiting plate and the sliding sleeve.

[0017] Further effect: When the cutting knife needs to be installed on the long buckle, pass the connecting rod through the perforation and the communication hole, and make the limiting plate abut against one side of the long buckle. At this time, align the T-shaped rod on the sliding sleeve with the T-shaped slot, and then push the sliding sleeve towards the cutting knife to make the sliding sleeve approach the cutting knife end on the other end of the connecting rod. When the sliding sleeve abuts against one side of the cutting knife, then rotate the driving disc forward by hand, drive the T-shaped rod to rotate in the lifting perforation through the driving rod, and the T-shaped rod cooperates with the internal thread surface so that the T-shaped rod gradually descends until the T-shaped rod abuts against the connecting rod in the T-shaped slot, fixing the sliding sleeve on the connecting rod, so as to limit one side of the cutting knife by the sliding sleeve, and thus limit the cutting knife on the long buckle through the cooperation of the limiting plate and the sliding sleeve.

[0018] Further effect: The anti-slip layer and the anti-slip bumps can improve the friction between the two when the T-shaped rod abuts against the connecting rod, further preventing the phenomenon that the T-shaped rod slides in the T-shaped slot, so as to improve the fixing effect of the sliding sleeve.

[0019] Further effect: The limiting ring groove and the limiting ring plate can prevent the T-shaped rod from slipping out of the lifting perforation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is the structural schematic diagram of the present invention;

[0022] Figure 2 corresponds to Figure 1 the enlarged view of part A;

[0023] Figure 3 is the side sectional view of the sliding sleeve and the connecting rod in the present invention;

[0024] Figure 4 corresponds to Figure 3 another embodiment diagram;

[0025] Figure 5 corresponds to Figure 3 the enlarged view of part B;

[0026] Figure 6 is the side sectional view of the sliding sleeve, the installation ball groove and the ball in the present invention;

[0027] Figure 7 corresponds to Figure 3 the enlarged view of part C;

[0028] Figure 8 corresponds to Figure 4 the enlarged view of Part D.

[0029] Description of the reference numerals in the drawings: working table 1 of the film cutting machine, tool holder 2, cutting tool 3, motor base 4, motor 5, counterweight 6, long buckle 7, perforation 8, communication hole 9, connecting rod 10, limiting plate 11, sliding sleeve 12, T-shaped slot 13, T-shaped rod 14, lifting perforation 15, limiting ring groove 16, limiting ring plate 17, tension spring 18, driving rod 19, driving disc 20, internal thread surface 21, anti-slip layer 22, anti-slip convex block 23, mounting ball groove 24, ball 25. Detailed implementation manners

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] The technical solution adopted in this detailed implementation manner is as follows: Embodiment 1

[0032] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7As shown in the figure, a film cutting machine for food packaging cartons includes a film cutting machine workbench 1, a tool holder 2 arranged on the film cutting machine workbench 1, a cutting knife 3 whose tail end is movably connected to the tool holder 2 through a pin shaft, a motor 5 seat 4 arranged on the workbench, a motor 5 arranged on the motor 5 seat 4, a counterweight 6 arranged on the motor 5, and a long buckle 7 hinged to one end of the counterweight 6. The front end of the cutting knife 3 is hinged to the long buckle 7. A perforation 8 is formed on the front end face of the cutting knife 3 on the long buckle 7. A communication hole 9 communicating with the perforation 8 is formed at the front end of the cutting knife 3. A connecting rod 10 is arranged in the perforation 8 and the communication hole 9 between the long buckle 7 and the cutting knife 3. The connecting rod 10 is in clearance fit with the perforation 8 and the communication hole 9 respectively. One end of the connecting rod 10 passes through the perforation 8 and is located outside the long buckle 7. The other end of the connecting rod 10 passes through the communication hole 9 and is located outside the cutting knife 3. A limiting plate 11 is arranged at one end of the connecting rod 10. A sliding sleeve 12 is slidably arranged at the other end of the connecting rod 10. The sliding sleeve 12 is used to slide at the other end of the connecting rod 10 when driven by an external force. Two T-shaped slots 13 are symmetrically formed at the other end of the connecting rod 10. Two T-shaped rods 14 for sliding cooperation with the T-shaped slots 13 are arranged on the sliding sleeve 12. Lifting perforations 15 are formed on the sliding sleeve 12 outside each T-shaped rod 14. The T-shaped rods 14 can be lifted and lowered in the lifting perforations 15. A fixing member is arranged in the lifting perforations 15 between the T-shaped rods 14 and the sliding sleeve 12 for fixing or releasing the sliding sleeve 12 on the connecting rod 10 so that the sliding sleeve 12 limits one side of the cutting knife 3. The T-shaped slots 13 are arranged along the length direction of the connecting rod 10.

[0033] The fixing member includes a limiting ring groove 16 formed on the sliding sleeve 12 and communicating with the lifting perforation 15. The limiting ring groove 16 is located on the outer peripheral side of each T-shaped rod 14. A limiting ring plate 17 is fixedly arranged on the peripheral side of the T-shaped rod 14. The limiting ring plate 17 can be lifted and lowered in the limiting ring groove 16. At least two tension springs 18 are arranged in the limiting ring groove 16 between the limiting ring plate 17 and the sliding sleeve 12. A driving rod 19 is arranged in the lifting perforation 15 on each T-shaped rod 14. The end face of the driving rod 19 away from the connecting rod 10. The driving rod 19 passes through the lifting perforation 15 and is located outside the sliding sleeve 12. A driving disc 20 is arranged on the driving rod 19. The driving disc 20 is located outside the sliding sleeve 12.

[0034] An anti-slip layer 22 for increasing the friction between the T-shaped rod 14 and the connecting rod 10 is arranged on the end face of the T-shaped rod 14 close to the sliding sleeve 12. A number of anti-slip bumps 23 are arranged on the anti-slip layer 22.

[0035] The anti-slip layer 22 is a rubber layer.

[0036] As Figure 6 shown, a friction reducing device for reducing the friction between the sliding sleeve 12 and the side end face of the cutting tool 3 is provided on the end face of the sliding sleeve 12 close to the cutting tool 3. The friction reducing device includes a mounting ball groove 24 opened on the end face of the sliding sleeve 12 close to the cutting tool 3, and a ball 25 arranged in the mounting ball groove 24 on the sliding sleeve 12.

[0037] The working principle of the present utility model: When it is necessary to remove the cutting tool 3 from the long buckle 7 for maintenance or replacement of the cutting tool 3, by keeping the driving disk 20 pressed by hand, the driving rod 19 drives the T-shaped rod 14 to descend in the lifting through hole 15, so that the T-shaped rod 14 no longer abuts on the connecting rod 10 in the T-shaped slot 13, thereby releasing the fixing of the sliding sleeve 12 on the connecting rod 10. At this time, pull the sliding sleeve 12 out from the other end of the connecting rod 10, and pull the limiting plate 11 outwards to drive the connecting rod 10 out from the through hole 8 and the communication hole 9. There is no need to operate with tools, and the disassembly difficulty is small, which can improve the convenience of removing the cutting tool 3 from the fixing pin; when it is necessary to install the cutting tool 3 on the long buckle 7, pass the connecting rod 10 through the through hole 8 and the communication hole 9, so that the limiting plate 11 abuts against one side surface of the long buckle 7. At this time, continuously press the driving disk 20 by hand to drive the T-shaped rod 14 to descend in the lifting through hole 15, align the T-shaped rod 14 on the sliding sleeve 12 with the T-shaped slot 13, and then push the sliding sleeve 12 towards the cutting tool 3 so that the sliding sleeve 12 approaches the cutting tool 3 at the other end of the connecting rod 10. After the sliding sleeve 12 abuts against one side surface of the cutting tool 3, remove the pressing of the driving disk 20 by hand, so that the tension spring 18 drives the T-shaped rod 14 to rise in the lifting through hole 15, and the T-shaped rod 14 abuts in the T-shaped opening, thereby preventing the T-shaped rod 14 from sliding in the T-shaped opening, so as to fix the sliding sleeve 12 on the connecting rod 10. The sliding sleeve 12 limits one side of the cutting tool 3, so that the cutting tool 3 is restricted on the long buckle 7 through the cooperation of the limiting plate 11 and the sliding sleeve 12; the anti-slip layer 22 and the anti-slip convex block 23 can improve the friction between the two when the T-shaped rod 14 abuts on the connecting rod 10, and further prevent the phenomenon that the T-shaped rod 14 slides in the T-shaped slot 13, so as to improve the fixing effect on the sliding sleeve 12. Embodiment 2

[0038] See Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 、 Figure 8As shown in the above Example 1, taking the above Example 1 as an example, the fixing member may also be provided with an internal thread surface 21 in the lifting through hole 15 on the sliding sleeve 12. Each T-shaped rod 14 is in threaded cooperation with the internal thread surface 21. A driving rod 19 is provided in the lifting through hole 15 on each T-shaped rod 14. The end surface of the driving rod 19 away from the connecting rod 10 passes through the lifting through hole 15 and is located outside the sliding sleeve 12. A driving disk 20 is provided on the driving rod 19, and the driving disk 20 is located outside the sliding sleeve 12. An anti-slip layer 22 for increasing the friction between the T-shaped rod 14 and the connecting rod 10 may be provided on the end surface of the T-shaped rod 14 away from the sliding sleeve 12. A number of anti-slip bumps 23 are provided on the anti-slip layer 22, and the anti-slip layer 22 is a rubber layer.

[0039] Working principle of the present utility model: When it is necessary to install the cutting knife 3 on the long buckle 7, the connecting rod 10 is passed through the through hole 8 and the communication hole 9, so that the limiting plate 11 abuts against one side surface of the long buckle 7. At this time, the T-shaped rod 14 on the sliding sleeve 12 is aligned with the T-shaped slot 13. Then, the sliding sleeve 12 is pushed towards the cutting knife 3, so that the sliding sleeve 12 approaches the cutting knife 3 at the other end of the connecting rod 10. When the sliding sleeve 12 abuts against one side surface of the cutting knife 3, then the driving disk 20 is rotated forward by hand. The T-shaped rod 14 is driven by the driving rod 19 to rotate in the lifting through hole 15. The T-shaped rod 14 cooperates with the internal thread surface 21, so that the T-shaped rod 14 gradually descends until the T-shaped rod 14 abuts against the connecting rod 10 in the T-shaped slot 13, and the sliding sleeve 12 is fixed on the connecting rod 10, so that the sliding sleeve 12 limits one side of the cutting knife 3. Thus, the cutting knife 3 is restricted on the long buckle 7 through the cooperation of the limiting plate 11 and the sliding sleeve 12; When it is necessary to remove the cutting knife 3 from the long buckle 7, the driving disk 20 is rotated reversely by hand, so that the T-shaped rod 14 is driven by the driving rod 19 to rotate in the lifting through hole 15. The T-shaped rod 14 cooperates with the internal thread surface 21, so that the T-shaped rod 14 gradually ascends. The T-shaped rod 14 no longer abuts against the connecting rod 10 in the T-shaped slot 13. At this time, the sliding sleeve 12 is pulled outwards from the other end of the connecting rod 10, and the limiting plate 11 is pulled outwards to drive the connecting rod 10 to be taken out from the through hole 8 and the communication hole 9.

[0040] What the present utility model wants to protect is the structure of the product. The models of each component are not the content protected by the present utility model and are also well-known technologies. Any component that can achieve the above functions of the present utility model on the market can be selected and applied as a film cutting machine for food packaging cartons. Therefore, the parameters such as the model of the component are not described in detail in the present utility model. The contribution of the present utility model lies in scientifically combining each component together.

[0041] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and explanations only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Where the present utility model is not described in detail, it is all well-known technology to those skilled in the art.

Claims

1. A film cutting machine for food packaging cartons, comprising a film cutting machine workbench, a tool holder arranged on the film cutting machine workbench, a cutting knife with its tail end movably connected to the tool holder through a pin shaft, a motor base arranged on the workbench, a motor arranged on the motor base, a counterweight arranged on the motor, and a long buckle hinged to one end of the counterweight, wherein the front end of the cutting knife is hingedly connected to the long buckle, and it is characterized in that: A perforation is provided on the front end face of the cutting knife in the long buckle. A communication hole communicating with the perforation is provided at the front end of the cutting knife. A connecting rod is arranged in the perforation and the communication hole between the long buckle and the cutting knife. The connecting rod is in clearance fit with the perforation and the communication hole respectively. One end of the connecting rod passes through the perforation and is located outside the long buckle. The other end of the connecting rod passes through the communication hole and is located outside the cutting knife. A limiting plate is arranged at one end of the connecting rod. A sliding sleeve is slidably arranged at the other end of the connecting rod. The sliding sleeve is used to slide at the other end of the connecting rod when driven by an external force. Two T-shaped slots are symmetrically provided at the other end of the connecting rod. Two T-shaped rods for sliding cooperation with the T-shaped slots are arranged on the sliding sleeve. Lifting perforations are provided on the sliding sleeve outside each T-shaped rod. The T-shaped rods can be lifted in the lifting perforations. A fixing member is arranged in the lifting perforations between the T-shaped rods and the sliding sleeve to fix or release the sliding sleeve on the connecting rod so that the sliding sleeve limits one side of the cutting knife. The T-shaped slots are arranged along the length direction of the connecting rod.

2. The film cutting machine for a food packaging carton according to claim 1, characterized in that: The fixing member includes a limiting ring groove provided on the sliding sleeve and communicating with the lifting perforation. The limiting ring groove is located on the outer peripheral side of each T-shaped rod. A limiting ring plate is fixedly arranged on the peripheral side of the T-shaped rod. The limiting ring plate can be lifted in the limiting ring groove. At least two tension springs are arranged in the limiting ring groove between the limiting ring plate and the sliding sleeve. A driving rod is arranged in the lifting perforation on each T-shaped rod. The end face of the driving rod away from the connecting rod. The driving rod passes through the lifting perforation and is located outside the sliding sleeve. A driving disc is arranged on the driving rod. The driving disc is located outside the sliding sleeve.

3. A film cutting machine for food packaging cartons according to claim 1, characterized in that: The fixing member includes an internal thread surface arranged in the lifting perforation on the sliding sleeve. Each T-shaped rod is in threaded cooperation with the internal thread surface. A driving rod is arranged in the lifting perforation on each T-shaped rod. The end face of the driving rod away from the connecting rod. The driving rod passes through the lifting perforation and is located outside the sliding sleeve. A driving disc is arranged on the driving rod. The driving disc is located outside the sliding sleeve.

4. A film cutting machine for food packaging cartons according to claim 2, characterized in that: An anti-slip layer for increasing the friction between the T-shaped rod and the connecting rod is arranged on the end face of the T-shaped rod close to the sliding sleeve. A number of anti-slip bumps are arranged on the anti-slip layer.

5. A film cutting machine for a food packaging carton according to claim 4, characterized in that: The anti-slip layer is a rubber layer.

6. A film cutting machine for food packaging cartons according to claim 1, characterized in that: A friction reducing device for reducing the friction between the sliding sleeve and the side end face of the cutting knife is arranged on the end face of the sliding sleeve close to the cutting knife.

7. A film cutting machine for a food packaging carton according to claim 6, characterized in that: The friction reducing device includes a mounting ball groove provided on the end face of the sliding sleeve close to the cutting knife and a ball arranged in the mounting ball groove on the sliding sleeve.

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