Shredding knife adjusting structure

Abstract

The utility model discloses a shred shoveling cutter adjusting structure which comprises an installation frame installed on an air suction chamber. The PLC control system is mounted on the mounting frame; the shred shoveling knife is mounted in the air suction chamber; the adjusting assembly is mounted in the air suction chamber and is used for adjusting the angle of the shred shoveling cutter; the sleeve is mounted on the mounting frame; the first driving part is mounted on the mounting frame; the adjusting cam is fixedly mounted at the output end of the first driving part, and the adjusting cam is coaxially arranged in the sleeve; the lifting assemblies are symmetrically installed on the side face of the sleeve; the chopper is mounted at the end, away from the sleeve, of the lifting assembly; the overturning positioning assembly is arranged at the end part of the sleeve; the power assembly is used for driving the chopper close to the tobacco shreds to rotate; when the two sets of lifting assembly adjusting cams rotate, the riving knives located on the two symmetrical sides of the sleeve are driven to synchronously move away from each other or move towards each other. The tobacco shred shoveling knife adjusting structure solves the problem that the production efficiency is reduced when tobacco shreds with different thicknesses are replaced and produced.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette making machines, in particular to a scraper blade adjustment structure. Background Art

[0002] Cigarette making machine is a device used to produce cigarettes. It uses an automated process to make cigarettes from tobacco and other materials. The suction chamber is an important part of the cigarette making machine, which is provided with negative pressure by a high-pressure fan. The working pressure is 8.0×10 3 Pa, the lower part of the suction chamber is equipped with a tobacco guide rail and a guide plate, forming a tobacco forming groove. The driving wheel drives the tobacco ribbon to rotate. The tobacco adsorbed on the tobacco ribbon is transported forward with the tobacco ribbon. Under the action of the tobacco guide rail, a tobacco bundle of a certain width is formed and transported to the leveler device for trimming and shaping. By adjusting the distance between the leveler and the tobacco ribbon, the thickness of the tobacco bundle passing through can be adjusted to meet the production of cigarettes of different sizes. Finally, the tobacco trimmed by the leveler on the tobacco ribbon is scraped off by the scraper and dropped onto the cigarette paper at the entrance of the cigarette gun;

[0003] However, in order to effectively scrape the tobacco off the suction belt, the angle of the scraper needs to be adjusted. For thicker tobacco, the angle between the scraper and the suction belt needs to be reduced to facilitate better scooping of the tobacco. For thinner tobacco, this angle needs to be increased to avoid over-compacting the tobacco or damaging the tobacco. During the use of common cigarette-making machines, when it is necessary to adjust the thickness of the tobacco and the angle of the scraper or replace the worn leveler blade, it is necessary to stop the machine and open the suction chamber for adjustment, which reduces the production efficiency of cigarette processing. Therefore, it is necessary to provide a scraper adjustment structure to solve the above problems.

[0004] It should be noted that the above information disclosed in this Background section is only for understanding the background of the present inventive concept and therefore it may contain information that does not constitute the prior art. Utility Model Content

[0005] In view of the above shortcomings, the present invention provides a scraper knife adjustment structure, which can solve the problem of reducing production efficiency due to the need to stop the machine to adjust the splitting knife position when changing to produce tobacco of different thicknesses.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a scraping knife adjustment structure, comprising:

[0007] Suction chamber;

[0008] A mounting frame, which is mounted on the suction chamber;

[0009] A PLC control system, which is installed on the mounting frame;

[0010] A wire scraper, which is installed in the suction chamber;

[0011] An adjusting component is installed in the suction chamber and is used to adjust the angle of the scraping knife;

[0012] A sleeve is rotatably mounted on the mounting frame, and the sleeve is a hollow cylindrical structure;

[0013] A first driving unit, which is fixedly mounted on the mounting frame, and the first driving unit is connected to the PLC control system signal;

[0014] an adjusting cam fixedly mounted on an output end of the first driving portion, the adjusting cam being coaxially disposed in the sleeve;

[0015] Lifting components, which are two sets and symmetrically installed on the sides of the sleeve;

[0016] a riving knife mounted on an end of the lifting assembly away from the sleeve;

[0017] a flip positioning assembly, which is arranged at the end of the sleeve and is used to position the riving knife;

[0018] A power assembly is mounted on the mounting frame, the power assembly is connected to the PLC control system signal, and is used to drive the chopper close to the tobacco to rotate; wherein,

[0019] When the regulating cam rotates, the two groups of lifting assemblies drive the riving knives located on both sides of the sleeve to move away from or towards each other synchronously.

[0020] Furthermore, the lifting assembly includes two groups of guide sleeves fixedly mounted on opposite sides of the sleeve, a camshaft is slidably arranged in the guide sleeve, a first elastic portion is installed between the camshaft and the guide sleeve, one end of the camshaft abuts against the adjusting cam, and the camshaft has a tendency to move toward the adjusting cam under the elastic action of the first elastic portion, the camshaft is rotatably connected to a rotating shaft at one end away from the adjusting cam, and the rotating shaft is fixedly connected to the chopper at one end away from the camshaft.

[0021] Furthermore, one end of the camshaft that abuts against the adjusting cam is provided with a circular chamfer.

[0022] Furthermore, the flip positioning assembly includes a rotary groove provided on the mounting frame, the rotary groove is provided with a first limit and a second limit at the upper and lower sides, the sleeve is fixedly installed with a guide sleeve on opposite sides at one end close to the rotary groove, a slide rod is slidably installed in the guide sleeve, the slide rod is provided in the rotary groove at one end away from the guide sleeve, a third elastic part is installed between the slide rod and the guide sleeve, the slide rod has a tendency to extend outward under the elastic force of the third elastic part, a torque sensor is installed on the first driving part, and the torque sensor is connected to the PLC control system signal; wherein,

[0023] When the slide bars are respectively located at the two groups of the second limit positions, one group of the splitters is in a position for trimming the shredded tobacco.

[0024] Furthermore, the power assembly includes a second drive unit fixedly mounted on the mounting frame, the second drive unit is connected to the PLC control system signal, an active bevel gear is mounted on the output end of the second drive unit, a passive bevel gear is fixedly mounted on the rotating shaft close to the side of the active bevel gear, the active bevel gear is meshed with the passive bevel gear; the two groups of rotating shafts on the same side are driven by gears.

[0025] Furthermore, a lifting sleeve is fixedly installed on the mounting frame, a pull rod is slidably connected inside the lifting sleeve, a retractable universal shaft is installed between the second driving part and the active bevel gear, the outer end of the pull rod is sleeved on the retractable universal shaft, and a second elastic part is installed between the pull rod and the lifting sleeve. Under the elastic action of the second elastic part, the pull rod has a tendency to move toward the sleeve, and drives the active bevel gear to approach and engage with the passive bevel gear.

[0026] Furthermore, a contact sensor is fixedly installed on the inner bottom of the lifting sleeve, and the contact sensor is connected to the PLC control system signal.

[0027] Furthermore, the adjustment component includes a slide plate slidably connected to the suction chamber, a third driving part is installed on the slide plate, the third driving part is connected to the PLC control system signal, the output end of the third driving part is fixedly connected to the wire scraper, the output end of the third driving part is engaged with the rack on the suction chamber through a gear, an encoder is installed on the first driving part, and the encoder is connected to the PLC control system signal.

[0028] Furthermore, the outer ring of the adjusting cam is composed of two groups of sloped arc surfaces connected end to end through cross sections.

[0029] Furthermore, a plurality of notches are evenly arranged in the circumferential direction of the riving knife.

[0030] Compared with the existing technology, the beneficial effects of the present invention are: a scraper adjustment structure of the present invention adjusts the angle of the scraper in real time according to the thickness of the trimmed tobacco through an adjustment component, and adjusts the position of the chopper through the cooperation of the camshaft and the adjustment cam, thereby conveniently adjusting the trimming thickness of the tobacco bundle and improving the production efficiency of cigarettes.

[0031] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0033] Figure 1 This is a schematic diagram of the overall structure of a scraper adjustment structure in the utility model;

[0034] Figure 2 for Figure 1 Schematic diagram of the rear side upward view;

[0035] Figure 3 for Figure 1 A partial enlarged schematic diagram of area A in the middle;

[0036] Figure 4 for Figure 3 A side cross-sectional schematic diagram of ;

[0037] Figure 5 for Figure 4 A magnified schematic diagram of area B in the middle;

[0038] Figure 6 for Figure 3 A side cross-sectional schematic diagram of ;

[0039] Figure 7 for Figure 3 A schematic diagram of the cross section of the middle C area;

[0040] Figure 8 This is a schematic diagram of the assembly of the adjustment component, scraper, etc. in the utility model.

[0041] Among them, the reference numerals in the figures are:

[0042] 1. Suction chamber; 2. Mounting frame; 3. First drive unit; 4. Second drive unit; 5. Sleeve; 6. Retractable universal joint; 7. Pull rod; 8. Lifting sleeve; 9. Chopper; 10. Rotating shaft; 11. Transmission gear; 12. Camshaft; 13. Adjusting cam; 14. Guide sleeve; 15. First elastic part; 16. Second elastic part; 17. Contact sensor; 18. Active bevel gear; 19. Passive bevel gear; 20. Rotating groove; 21. Slide rod; 22. Third elastic part; 23. Guide sleeve; 24. First limit; 25. Second limit; 26. Wire scraper; 27. Third drive unit; 28. Slide plate; 29. ​​Notch; 30. Pinion; 31. Gear; 32. Idle gear; 33. Rack; 34. Suction wire. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] like Figures 1 to 8As shown, the utility model provides a scraper adjustment structure, including a suction chamber 1 and a mounting frame 2 fixedly installed on the suction chamber 1, and a PLC control system is fixedly installed on the rear side of the mounting frame 2, and the PLC control system is used to automatically or manually control various electrical components.

[0047] like Figure 3 and Figure 4 As shown, a sleeve 5 is rotatably installed in the mounting frame 2 through a bearing, and the sleeve 5 is a cylindrical structure with a hollow interior; a first driving part 3 is fixedly installed on the front side of the mounting frame 2, and the first driving part 3 is preferably a driving motor. The first driving part 3 is connected to the PLC control system signal and is controlled by the PLC control system, and an adjusting cam 13 is fixedly installed on the output end of the first driving part 3. The adjusting cam 13 is coaxially arranged on the inner side of the sleeve 5, and the adjusting cam 13 can be driven to rotate inside the sleeve 5 by the first driving part 3. The outer ring of the adjusting cam 13 is two groups of sloped arc surfaces connected end to end through the cross section.

[0048] like Figure 4 and Figure 5 As shown, two groups of lifting components are symmetrically installed on both sides of the circumferential direction of the sleeve 5, and each group of lifting components includes two groups of guide sleeves 14 fixedly installed on the sleeve 5. The guide sleeves 14 radially pass through the sleeve 5, and the two groups of guide sleeves 14 are arranged along the axial direction of the sleeve 5. The camshaft 12 is slidably connected in the guide sleeve 14, and a first elastic part 15 is fixedly installed between the camshaft 12 and the guide sleeve 14. The first elastic part 15 is preferably a spring, which is sleeved on the outside of the camshaft 12. The camshaft 12 is suitable for having its end abutted on the surface of the adjusting cam 13 under the elastic action of the first elastic part 15, that is, one end of the camshaft 12 abuts on the adjusting cam 13, and the camshaft 12 has a tendency to move toward the adjusting cam 13 under the elastic action of the first elastic part 15.

[0049] The end of the camshaft 12 away from the adjusting cam 13 is rotatably connected to the rotating shaft 10 through a bearing. The end of the rotating shaft 10 away from the camshaft 12 is fixedly mounted with a chopper 9. The chopper 9 can rotate freely following the rotating shaft 10 without being affected by the camshaft 12. The two groups of choppers 9 on the same side are on the same plane and are evenly distributed on both sides of the suction belt 34.

[0050] When the adjusting cam 13 rotates clockwise or counterclockwise under the drive of the first driving portion 3 , the camshaft 12 can drive the riving knife 9 to move closer to or away from the adjusting cam 13 under the elastic force of the first elastic portion 15 .

[0051] One end of the camshaft 12 that contacts the adjusting cam 13 is provided with a circular chamfer, thereby improving the smoothness of the camshaft 12 sliding on the surface of the adjusting cam 13 .

[0052] like Figure 5 and Figure 7 As shown, in order to make the chopper 9 (located at the top) stay at the cutting position of the tobacco, a flip positioning assembly is provided on one side of the sleeve 5, and the flip positioning assembly includes a rotary groove 20 opened on the mounting frame 2, and the rotary groove 20 is provided with a first limit 24 and a second limit 25 at the upper and lower ends. The length of the two groups of second limit 25 from the center of the rotary groove 20 is greater than the length of the two groups of first limit 24. The rotary groove 20 is a rotary channel connected end to end by the upper and lower groups of first limit 24 and second limit 25 through an arc groove.

[0053] A guide sleeve 23 is fixedly installed on one side of the sleeve 5 close to the rotary groove 20. There are two guide sleeves 23, which are fixedly installed on opposite sides of one end of the sleeve 5 close to the rotary groove 20. A slide rod 21 is slidably installed in the guide sleeve 23. The end of the slide rod 21 away from the guide sleeve 23 is bent toward the rotary groove 20 and is located in the rotary groove 20. By rotating the sleeve 5, the end of the slide rod 21 can slide in the rotary groove 20.

[0054] A third elastic part 22 is installed between the slide rod 21 and the guide sleeve 23. The third elastic part 22 is preferably a spring. The slide rod 21 has a tendency to extend outward under the elastic force of the third elastic part 22. A torque sensor is installed on the first drive part 3. The torque sensor is connected to the PLC control system signal. The torque value can be set in the PLC control system. When the rotation of the first drive part 3 is blocked, the torque sensor will send a signal to the PLC control system to stop further rotation. When the slide rod 21 is respectively on the two sets of second limit positions 25, the chopper 9 on the upper side is in the position for trimming the tobacco.

[0055] like Figures 3 to 5 As shown, in order to enable the chopper 9 rotated to the upper side to rotate and trim the tobacco, a power assembly is installed on the mounting frame 2, and the power assembly includes a second driving part 4 fixedly mounted on the mounting frame 2, and the second driving part 4 is preferably a driving motor. The second driving part 4 is connected to the PLC control system signal, and the output end of the second driving part 4 is installed with an active bevel gear 18, and the active bevel gear 18 is arranged on the upper side of the sleeve 5. The two sets of rotating shafts 10 near the side of the active bevel gear 18 are fixedly mounted with passive bevel gears 19, and the active bevel gear 18 is meshed with the passive bevel gear 19. The two sets of rotating shafts 10 on the same side are fixedly mounted with transmission gears 11, and the two sets of transmission gears 11 on the same side are meshed with each other.

[0056] When the second driving part 4 drives the active bevel gear 18 to rotate, the active bevel gear 18 and the passive bevel gear 19 are engaged to drive the upper rotating shaft 10 to rotate. The meshing transmission of the transmission gear 11 can drive the choppers 9 on the two sets of rotating shafts 10 on the upper side to rotate in opposite directions, thereby achieving the effect of trimming the tobacco.

[0057] like Figure 5As shown, in order to ensure that the active bevel gear 18 can always maintain an engaged state with the passive bevel gear 19 when the height of the riving knife 9 is adjusted, a lifting sleeve 8 is fixedly installed on the mounting frame 2, and a pull rod 7 is slidably connected inside the lifting sleeve 8. The pull rod 7 is in a vertical state. A telescopic universal shaft 6 is installed between the second driving part 4 and the active bevel gear 18. The outer end of the pull rod 7 away from the lifting sleeve 8 is sleeved on the telescopic universal shaft 6. A second elastic part 16 is installed between the pull rod 7 and the lifting sleeve 8. The second elastic part 16 is preferably a spring. The second elastic part 16 is used to give the pull rod 7 a force to drive the active bevel gear 18 to slide in the direction of the sleeve 5. Under the elastic action of the second elastic part 16, the pull rod 7 has a tendency to move toward the sleeve 5, and drives the active bevel gear 18 to approach and engage with the passive bevel gear 19.

[0058] like Figure 6 As shown, when the camshaft 12 abuts against the highest point of the slope arc surface of the adjusting cam 13, the pull rod 7 overcomes the elasticity of the second elastic part 16 and is in the upper position. When the adjusting cam 13 is driven to rotate by the first driving part 3, so that the camshaft 12 slides toward the lower part of the slope arc surface, the upper rotating shaft 10 moves toward the adjusting cam 13 and drives the passive bevel gear 19 to slide toward the adjusting cam 13. The pull rod 7 is also driven by the elastic force of the second elastic part 16 to drive the active bevel gear 18 to slide downward following the passive bevel gear 19 through the telescopic universal shaft 6, thereby maintaining the meshing state of the active bevel gear 18 and the passive bevel gear 19.

[0059] A contact sensor 17 is fixedly installed on the inner bottom of the lifting sleeve 8. The contact sensor 17 is connected to the PLC control system signal. The contact sensor 17 is suitable for giving the PLC control system a signal when the pull rod 7 contacts it, thereby controlling the second driving part 4 to stop rotating.

[0060] like Figure 8 As shown, an adjustment component is provided in the suction chamber 1, and the adjustment component includes a slide plate 28 slidably connected in the suction chamber 1, and a third driving part 27 is fixedly installed on the slide plate 28. The third driving part 27 is preferably a motor, and the third driving part 27 is connected to the PLC control system signal. A wire scraper 26 is fixedly installed at the output end of the third driving part 27. The third driving part 27 can be controlled by the PLC control system to drive the wire scraper 26 to rotate to adjust the angle of the wire scraper 26.

[0061] An encoder is installed on the first drive unit 3, and the encoder is connected to the PLC control system signal. The encoder can detect the rotation angle of the first drive unit 3, so that when the height of the cleaver 9 is adjusted by the first drive unit 3, the third drive unit 27 can be controlled in real time by the PLC control system to adjust the angle of the scraper 26 to meet the requirements of the scraper 26 for the angle of tobacco with different thicknesses.

[0062] The gear 33 is fixedly mounted in the suction chamber 1, and the output end of the third driving part 27 is fixedly mounted with a pinion 30. The slide plate 28 is rotatably connected to the idler gear 32 and the large gear 31. The pinion 30, the idler gear 32 and the large gear 31 are meshed in sequence, and the large gear 31 is meshed with the rack 33. When the third driving part 27 drives the scraper 26 to rotate upward, the meshing transmission of the pinion, the idler gear, the large gear and the rack can drive the slide plate 28 to slide in the direction away from the suction ribbon 34. When the third driving part 27 drives the scraper 26 to rotate downward, the meshing transmission of the pinion 30, the idler gear 32, the large gear 31 and the rack 33 can drive the slide plate 28 to slide in the direction close to the suction ribbon 34. Therefore, when the angle of the scraper 26 is adjusted, the distance between the scraper 26 and the suction ribbon 34 can be ensured to be unaffected, thereby ensuring the effectiveness of the scraping of the wire by the scraper 26.

[0063] A plurality of groups of notches 29 are evenly arranged in the circumferential direction of the cleaver 9. The presence of these notches 29 can effectively adjust and control the airflow. By changing the intensity and direction of the airflow in the suction chamber 1, the tobacco can be immediately sucked away and sent to the next processing link while being cut, avoiding the accumulation and blockage of tobacco fragments near the cleaver 9. This not only improves production efficiency, but also significantly reduces the risk of equipment failure, thereby ensuring the continuous and stable operation of the production line.

[0064] The following is the working principle of this utility model:

[0065] When the upper cleaver 9 is in a horizontal normal working position, the end of the slide bar 21 is in the second limit position 25 in the rotary groove 20 under the elastic force of the third elastic portion 22. The circumferential position of the cleaver 9 is fixed, and the active bevel gear 18 is driven to rotate by the second driving portion 4. The active bevel gear 18 is meshed with the passive bevel gear 19 and the transmission gears 11 on the two upper sets of rotating shafts 10, thereby driving the two upper sets of cleavers 9 to rotate and trim the tobacco.

[0066] When it is necessary to adjust the thickness of the tobacco, that is, the distance between the upper cleaver 9 and the suction ribbon, the first driving part 3 is controlled by the PLC control system to drive the adjusting cam 13 to rotate, so that the end of the camshaft 12 slides on the surface of the adjusting cam 13. When the camshaft 12 is closer to the higher part of the slope arc surface of the adjusting cam 13, the upper cleaver 9 is closer to the suction ribbon, and the trimmed tobacco is thinner. When the camshaft 12 is closer to the lower part of the slope arc surface of the adjusting cam 13, the upper cleaver 9 is farther away from the suction ribbon, and the trimmed tobacco is thicker. The position directly above the slope arc surface corresponds to the height position of the cleaver 9.

[0067] At the same time, the angle of rotation of the first driving part 3 is monitored by the encoder, thereby synchronously adjusting the angle of the wire scraping knife 26;

[0068] Furthermore, through the cooperation between the pull rod 7 and the second elastic portion 16, the active bevel gear 18 and the passive bevel gear 19 on the upper side can always be kept in meshing state during the raising and lowering process of the riving knife 9, ensuring that normal pruning can be performed when the upper riving knife 9 is adjusted to various positions;

[0069] During continuous use, the riving blade 9 will experience stress accumulation due to repeated mechanical and thermal stress. This stress accumulation will further lead to various failure modes of the blade, such as flank wear, cratering, built-up edge, micro-chipping, thermo-mechanical failure, cutting edge deformation, groove wear, and mechanical cracking. Therefore, during normal use, a timer can be set on the PLC control system to regularly switch the riving blades 9 on the upper and lower sides of the sleeve 5, so that the riving blades 9 on the upper and lower sides can be used alternately, thereby reducing stress accumulation caused by long-term use, giving the riving blades 9 some rest time, and extending the service life of the riving blades 9.

[0070] like Figure 6 、 Figure 7 As shown, during the automatic switching operation, the PLC control system controls the first driving unit 3 to control the adjusting cam 13 to rotate counterclockwise, so that the camshaft 12 continuously slides toward the lower part of the slope arc surface of the adjusting cam 13. When the camshaft 12 slides and contacts the cross section of the adjusting cam 13, the camshaft 12 cannot slide due to the obstruction of the cross section, so that the adjusting cam 13 pushes the camshaft 12 to rotate counterclockwise through its cross section, and then the sleeve 5 also rotates counterclockwise along with the camshaft 12.

[0071] At this time, the slide bar 21 also overcomes the elastic force of the third elastic part 22 under the action of the thrust of the sleeve 5 and rotates counterclockwise in the rotary groove 20. When the upper slide bar 21 rotates from the second limit position 25 to the first limit position 24 below the rotary groove 20, the slide bar 21 is stuck in the first limit position 24 below the rotary groove 20, and the rotation of the sleeve 5 is blocked, so that the torque sensor in the first drive part 3 reaches the set torque and gives a signal to the PLC control system. After receiving the signal, the PLC control system will control the first drive part 3 to rotate and automatically rotate clockwise to the height position of the last cleaver 9. When the first drive part 3 rotates clockwise, the slide bar 21 also loses the thrust of the sleeve 5 and slides to the second limit position 25 below under the elastic force of the third elastic part 22. At this time, the positions of the upper and lower cleavers 9 are exchanged, completing the alternating knife replacement action.

[0072] During the tool changing process, before the camshaft 12 slides to contact the cross section of the adjusting cam 13, the pull rod 7 will first contact the contact sensor 17 under the elastic force of the second elastic part 16, so that the PLC control system will control the second driving part 4 to stop rotating when receiving the signal from the contact sensor 17, thereby avoiding the continuous rotation of the active bevel gear 18 during the tool changing process, and facilitating the smooth engagement of the passive bevel gear 19 with the active bevel gear 18 after the tool changing is completed, thereby avoiding the continuous rotation of the active bevel gear 18 causing damage to the passive bevel gear 19 when entering into engagement;

[0073] When the first driving part 3 rotates clockwise to return to its original position, the passive bevel gear 19 slides upward and engages with the active bevel gear 18, and pushes the active bevel gear 18 to slide upward to overcome the elastic force of the second elastic part 16, so that the pull rod 7 is disengaged from the contact sensor 17, and the second driving part 4 is operated again to drive the cleaver 9 to perform the pruning action.

[0074] The cleaver 9 and the rotating shaft 10 are detachably mounted. When the cleaver 9 on one side is severely worn, the other side can be manually switched through the PLC control system to perform tobacco trimming work, and the cleaver 9 on the other side can be disassembled and replaced without affecting the normal operation of the cigarette making machine. After the replacement is completed, it is set to automatic switching mode through the PLC control system to improve production efficiency.

[0075] The utility model provides a scraper knife adjustment structure, which can adjust the angle of the scraper knife in real time according to the thickness of the trimmed tobacco by adjusting components such as an adjustment assembly, and adjust the position of the cleaver by cooperating with a cam shaft and an adjustment cam, thereby conveniently adjusting the trimmed thickness of the tobacco bundle and improving the production efficiency of cigarettes; and the cleaver can be automatically replaced at a regular time, or the cleavers can be used alternately, so as to reduce the stress accumulation of the cleaver caused by long-term use, give the cleaver a rest time, and extend the service life of the cleaver.

[0076] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A wire scraper adjustment structure, characterized by: include: Suction chamber (1); A mounting frame (2) mounted on the suction chamber (1); A PLC control system, which is mounted on the mounting frame (2); A scraping knife (26) is installed in the suction chamber (1); An adjustment component, which is installed in the suction chamber (1) and is used to adjust the angle of the scraping knife (26); A sleeve (5) is rotatably mounted on the mounting frame (2), and the sleeve (5) is a cylindrical structure with a hollow interior; A first drive unit (3) is fixedly mounted on the mounting frame (2), and the first drive unit (3) is connected to the PLC control system signal; An adjusting cam (13) fixedly mounted on the output end of the first driving portion (3), the adjusting cam (13) being coaxially arranged in the sleeve (5); Lifting components, which are in two groups and are symmetrically mounted on the sides of the sleeve (5); A splitting knife (9) is mounted on an end of the lifting assembly away from the sleeve (5); A flip positioning assembly, which is arranged at the end of the sleeve (5) and is used to position the riving knife (9); A power assembly is mounted on the mounting frame (2), the power assembly being connected to the PLC control system signal and used to drive the chopper (9) close to the tobacco to rotate; wherein, When the regulating cam (13) rotates, the two groups of lifting assemblies drive the choppers (9) located on both sides of the sleeve (5) to move synchronously away from or towards each other.

2. The wire scraper adjustment structure according to claim 1, characterized in that: The lifting assembly comprises two sets of guide sleeves (14) fixedly mounted on opposite sides of the sleeve (5), a camshaft (12) being slidably arranged in the guide sleeve (14), a first elastic portion (15) being mounted between the camshaft (12) and the guide sleeve (14), one end of the camshaft (12) being in contact with the adjusting cam (13), and the camshaft (12) having a tendency to move toward the adjusting cam (13) under the elastic action of the first elastic portion (15), the end of the camshaft (12) away from the adjusting cam (13) being rotatably connected to a rotating shaft (10), and the end of the rotating shaft (10) away from the camshaft (12) being fixedly connected to the chopper (9).

3. The wire scraper adjustment structure according to claim 2, characterized in that: One end of the camshaft (12) that abuts against the regulating cam (13) is provided with a circular arc chamfer.

4. The wire scraper adjustment structure according to claim 2, characterized in that: The flip positioning assembly includes a rotary groove (20) provided on the mounting frame (2), the rotary groove (20) is provided with a first limit (24) and a second limit (25) on the upper and lower sides, the sleeve (5) is fixedly provided with a guide sleeve (23) on opposite sides of one end close to the rotary groove (20), a slide rod (21) is slidably installed in the guide sleeve (23), the end of the slide rod (21) away from the guide sleeve (23) is provided in the rotary groove (20), a third elastic part (22) is installed between the slide rod (21) and the guide sleeve (23), the slide rod (21) has a tendency to extend outward under the elastic force of the third elastic part (22), a torque sensor is installed on the first driving part (3), and the torque sensor is connected to the PLC control system signal; wherein, When the slide bar (21) is located at two groups of the second limit positions (25), one group of the splitters (9) is in a position for trimming the tobacco shreds.

5. The wire scraper adjustment structure according to claim 4, characterized in that: The power assembly comprises a second drive unit (4) fixedly mounted on the mounting frame (2), the second drive unit (4) being connected to the PLC control system signal, an active bevel gear (18) being mounted on the output end of the second drive unit (4), a passive bevel gear (19) being fixedly mounted on the rotating shaft (10) on a side close to the active bevel gear (18), the active bevel gear (18) being meshed with the passive bevel gear (19); and two groups of rotating shafts (10) on the same side are driven by gears.

6. The wire scraper adjustment structure according to claim 5, characterized in that: A lifting sleeve (8) is fixedly mounted on the mounting frame (2), a pull rod (7) is slidably connected inside the lifting sleeve (8), a telescopic universal shaft (6) is mounted between the second driving portion (4) and the active bevel gear (18), an outer end portion of the pull rod (7) is sleeved on the telescopic universal shaft (6), a second elastic portion (16) is mounted between the pull rod (7) and the lifting sleeve (8), and the pull rod (7) has a tendency to move toward the sleeve (5) under the elastic action of the second elastic portion (16), and drives the active bevel gear (18) to approach and engage with the passive bevel gear (19).

7. The wire scraper adjustment structure according to claim 6, characterized in that: A contact sensor (17) is fixedly mounted on the inner bottom of the lifting sleeve (8), and the contact sensor (17) is connected to the PLC control system signal.

8. The wire scraper adjustment structure according to claim 1, characterized in that: The adjustment component includes a slide plate (28) slidably connected to the suction chamber (1), a third driving part (27) is installed on the slide plate (28), the third driving part (27) is connected to the PLC control system signal, the output end of the third driving part (27) is fixedly connected to the wire scraper (26), the output end of the third driving part (27) is meshed with the rack on the suction chamber (1) through a gear, and an encoder is installed on the first driving part (3), and the encoder is connected to the PLC control system signal.

9. The wire scraper adjustment structure according to claim 4, characterized in that: The outer ring of the regulating cam (13) is composed of two groups of sloped arc surfaces connected end to end through cross sections.

10. The wire scraper adjustment structure according to claim 1, characterized in that: The splitting knife (9) is provided with a plurality of groups of notches (29) evenly spaced in the circumferential direction.

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