A cross-cut knife sag correction structure and cross-cut machine

Abstract

The utility model relates to a kind of crosscutting knife sag correction structure and cross cutting machine.The crosscutting knife sag correction structure includes: rack, its quantity is two and is fixed on a base in parallel, and the opposite side of two the rack is symmetrically provided with transmission cavity, and the free end of the transmission cavity is fixedly equipped with wallboard;Crosscutting knife cylinder, its quantity is two and is in vertical direction parallel distribution, and its two free ends are all equipped with transmission gear extending to the transmission cavity in the wallboard, and two transmission gears located in the same side are engaged with each other;Inner core shaft, its quantity is two and is respectively assembled in the inner cavity of the crosscutting knife cylinder, and at least one eccentric bearing piece is sleeved on its axial middle part and is rotatably assembled with the inner wall surface of the crosscutting knife cylinder, to adjust and correct the crosscutting knife middle part sag anomaly;Eccentric expansion sleeve unit, its quantity is two and is respectively fixed on the free end of the inner core shaft located in lower side to adjust and correct the crosscutting knife of lower side both sides sag anomaly.The utility model can correct crosscutting knife middle part and both sides sag anomaly simultaneously and improve cutting quality.

Description

Technical Field

[0001] This utility model relates to the technical field of cardboard cutting equipment, specifically to a cross-cutting blade sag correction structure and a cross-cutting machine. Background Technology

[0002] In the production of corrugated and honeycomb paperboard, the cross-cutting machine is a key piece of equipment used to cut continuously produced paperboard into the required sizes. Traditional cross-cutting machines are usually driven by a motor, which drives the transmission system through a speed reducer, ultimately driving the upper and lower sets of cutter shafts to rotate synchronously in opposite directions. These two sets of cutter shafts are arranged with opposite helical directions, and cross-cutting blades are installed on their annular sidewalls. The cutting operation is completed when the upper and lower cutter shafts drive the cross-cutting blades to a position perpendicular to the paperboard.

[0003] As the width of corrugated cardboard production lines continues to increase, the length of the cross-cutting blade and its mounting cylinder also increases. However, this extended design brings significant sag problems: on the one hand, the middle of the cross-cutting blade sags noticeably due to its own weight; on the other hand, varying degrees of sag deformation may also occur on both sides of the cross-cutting blade. This sag phenomenon leads to quality problems such as incomplete cardboard cutting or rough edges during the cutting operation, seriously affecting product quality and production efficiency. Existing technologies lack effective solutions to simultaneously correct the sag abnormalities in the middle and sides of the cross-cutting blade. Therefore, we propose a cross-cutting blade sag correction structure and a cross-cutting machine. Utility Model Content

[0004] This application provides a cross-cutting blade sag correction structure and a cross-cutting machine to at least solve the problem of abnormal sag in the middle or both sides of the cross-cutting blade caused by the lengthening of the cross-cutting machine in the prior art.

[0005] In a first aspect, this application provides a cross-cutting blade sag correction structure, comprising: The frame consists of two frames that are fixed in parallel on a base. The two frames have symmetrically arranged transmission cavities on their opposite sides, and wall panels are fixedly mounted on the free ends of the transmission cavities. There are two transverse cutting blades, which are arranged in parallel vertically upwards. Each of their two free ends is provided with a transmission gear that penetrates the wall plate and extends into the transmission cavity. The two transmission gears located on the same side mesh with each other. Two inner mandrels are respectively assembled in the inner cavity of the cross-cutting blade cylinder. At least one eccentric bearing is sleeved in the middle of the mandrel and rotates with the inner wall of the cross-cutting blade cylinder to adjust and correct the abnormal sag in the middle of the cross-cutting blade. Two eccentric expansion sleeve units are fixed to the two free ends of the inner mandrel located on the lower side to adjust and correct the abnormal sag on both sides of the cross-cutting blade on the lower side.

[0006] Optionally, the cross-cutting cylinder includes: The cylindrical component has several axially equidistant paper feeding rollers fixedly mounted on its annular sidewall, and adjacent paper feeding rollers are connected by counterweights. A cross-cutting blade is axially fixed to the outer wall of the cylindrical component on the opposite side of the counterweight block; The outer sleeve, in quantity two, has its first end inserted and fixed to the two free ends of the cylindrical component; The transmission gears are two in number and are integrally formed on the second end of the outer sleeve.

[0007] Optionally, a plurality of locking slots arranged in a ring array are radially provided on the annular sidewalls at both ends of the cylindrical component, and locking blocks that are fixedly assembled with the outer sleeve are inserted into the fixing slots.

[0008] Optionally, at least one assembly bushing is also fitted on the outer sleeve, and the assembly bushing is fixedly assembled with the wall panel by a number of bolts.

[0009] Optionally, the eccentric expansion sleeve unit includes: An inner expansion sleeve is fitted onto the free end of the inner mandrel, and a concave portion is formed on its outer side. An eccentric expansion sleeve is fitted onto the free end of the inner mandrel and axially connected to the inner expansion sleeve via several corrective bolts. An eccentric boss is formed in the middle of its inner side to match and insert with the annular concave surface to adjust and correct the abnormal sag on both sides of the cross-cutting blade.

[0010] Optionally, the inner mandrel is provided axially in sequence with a first assembly section, a first inner cavity section, a bearing assembly section, a second inner cavity section, and a second assembly section; The eccentric bearing component is disposed on the bearing assembly section, and the diameter of the first inner cavity section is larger than the diameter of the second inner cavity section. A first end of the assembly piece abutting against the bearing assembly section is sleeved on the second inner cavity section, and the second end of the assembly piece is provided with a first locking sleeve that is threadedly assembled with the second inner cavity section to fix the assembly position of the assembly piece and the eccentric bearing component.

[0011] Optionally, both the first and second assembly sections are fitted with ball bearing components that are positioned and assembled with the inner cavity of the cross-cutting cylinder, and the first and second assembly sections are also threaded with second locking sleeves for fixing the axial position of the ball bearing components.

[0012] Optionally, a drive gear meshes with one of the transmission gears, and the drive gear is fixedly assembled to the output end of an external motor.

[0013] Secondly, this application provides a cross-cutting machine, including the cross-cutting blade sag correction structure described in the first aspect above.

[0014] Compared with related technologies, the cross-cutting blade sag correction structure and cross-cutting machine provided in this application have at least the following technical advantages: The eccentric bearing in the middle of the inner core shaft allows for easy adjustment of abnormal sag in the middle of the cross-cutting tube and the cross-cutting blade. In addition, the eccentric expansion sleeve unit can correct abnormal sag on both sides of the cross-cutting tube and the cross-cutting blade, thus effectively solving the problem of incomplete cutting or rough edges caused by sag when cutting wide cardboard. This has the advantages of improving cutting accuracy and production efficiency.

[0015] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a cross-cutting machine with a cross-cutting blade sag correction structure, according to an exemplary embodiment.

[0018] Figure 2 This is a schematic diagram of the combined structure of a cross-cutting barrel and an eccentric expansion sleeve unit according to an exemplary embodiment.

[0019] Figure 3 This is a cross-sectional view of a cross-cutting machine with a cross-cutting blade sag correction structure, according to an exemplary embodiment.

[0020] Figure 4 This is an exploded view of the combined structure of the cross-cutting barrel and the inner mandrel according to an exemplary embodiment.

[0021] Figure 5 This is a schematic diagram of an eccentric expansion sleeve unit structure according to another exemplary embodiment.

[0022] Figure 6 yes Figure 3 Enlarged schematic diagram of structure A in the middle. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] 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 the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In related technologies, as the width of corrugated cardboard production lines continues to increase, the length of the cross-cutting blade and its mounting cylinder also increases. However, this extended design brings significant sag problems: on the one hand, the middle of the cross-cutting blade sags noticeably due to its own weight; on the other hand, varying degrees of sag deformation may also occur on both sides of the cross-cutting blade. This sag phenomenon leads to quality problems such as incomplete cardboard cutting or rough edges during the cutting operation, seriously affecting product quality and production efficiency. Existing technologies lack effective solutions to simultaneously correct the sag abnormalities in the middle and sides of the cross-cutting blade.

[0027] Based on the above, this utility model provides a cross-cutting blade sag correction structure and a cross-cutting machine, which will be described in detail below with reference to specific embodiments and accompanying drawings.

[0028] Example 1 This utility model embodiment provides a cross-cutting blade sag correction structure. Figure 1 This is a perspective view of a cross-cutting machine with a cross-cutting blade sag correction structure, according to an exemplary embodiment. Figure 2This is a schematic diagram of the combined structure of a cross-cutting barrel and an eccentric expansion sleeve unit according to an exemplary embodiment. Figure 3 This is a cross-sectional view of a cross-cutting machine with a cross-cutting blade sag correction structure, according to an exemplary embodiment. Figure 4 This is an exploded view of the combined structure of the cross-cutting barrel and the inner mandrel according to an exemplary embodiment. Figure 5 This is a schematic diagram of an eccentric expansion sleeve unit structure according to another exemplary embodiment. Figure 6 yes Figure 3 Enlarged schematic diagram of structure A in the middle. (See diagram below.) Figure 1-6 As shown, the cross-cutting blade sag correction structure includes: There are two frames 20, which are fixed in parallel on a base 10. The two frames 20 have symmetrically opened transmission cavities 202 on their opposite sides, and wall panels 202 are fixedly assembled on the free ends of the transmission cavities 202.

[0029] There are two cross-cutting blade cylinders 30, which are arranged in parallel vertically upwards. Each of their two free ends is provided with a transmission gear 306 that penetrates the wall plate 202 and extends into the transmission cavity 202. The two transmission gears 306 located on the same side mesh with each other. One of the transmission gears 306 meshes with a drive gear. The drive gear is fixedly assembled to the output end of an external motor. The external motor provides rotational power to the drive gear, thereby meshing and transmitting power to the two meshing transmission gears 306 to rotate synchronously in opposite directions.

[0030] Two inner mandrels 40 are respectively assembled in the inner cavity of the cross-cutting tube 30. At least one eccentric bearing 80 with an outer bearing ring fixedly assembled to the inner wall of the cross-cutting tube 30 is sleeved in the middle of the mandrel 40 to adjust and correct the abnormal sag in the middle of the cross-cutting tube 303. In this embodiment, the eccentric bearing 80 adopts a combination structure of eccentric sleeve and roller bearing. The inner bearing ring of the eccentric bearing 80 is fixed to the inner mandrel 40, and the outer bearing ring is fixed to the inner wall of the cross-cutting tube 30. The rotation center is adjusted by changing the position of the support point by rotating the angle.

[0031] Two eccentric expansion sleeve units 70 are fixed to the two free ends of the inner mandrel 40 located on the lower side to adjust and correct the abnormal sag on both sides of the cross-cutting blade 303 on the lower side. In this embodiment, the eccentric expansion sleeve unit 70 includes: an inner expansion sleeve 701, which is sleeved on the free end of the inner mandrel 40, and has an annular concave part formed in the middle of its outer side; an eccentric expansion sleeve 702, which is sleeved on the free end of the inner mandrel 40 and axially connected to the inner expansion sleeve 701 through a plurality of correction bolts 703, and has an eccentric boss portion formed in the middle of its inner side that matches and inserts into the annular concave part to adjust and correct the abnormal sag on both sides of the cross-cutting blade 303; and an eccentric hole is opened in the middle of the eccentric expansion sleeve 702 to accommodate the insertion and adjustment of the free end of the inner mandrel 40 located on the lower side.

[0032] In the above embodiment, the two cross-cutting cylinders 30 achieve synchronous rotation in opposite directions through the meshing of the transmission gear 306. When an abnormal sag occurs in the middle of the cross-cutting blade 303, the inner spindle 40 is rotated to drive the eccentric bearing 80 to generate radial displacement during rotation, pushing the inner wall of the middle of the cross-cutting cylinder 30 to change its support position and compensate for the sag in the middle of the blade body. The two eccentric expansion sleeve units adjust the radial offset at both ends of the lower inner spindle 40 respectively. When an abnormal sag occurs on either side of the lower cross-cutting blade 303, the eccentric expansion sleeve can be rotated to adjust the radial offset. The expansion sleeve 702 changes the fitting angle between the eccentric boss and the annular concave part, and independently corrects the support height on both sides of the lower cross-cutting barrel 30. In this application, the eccentric bearing 80 in the middle of the inner spindle 40 and the eccentric expansion sleeve unit 70 at the end of the lower inner spindle 40 form an axial three-segment adjustment mechanism, which corresponds to the middle area and the two side areas of the blade body, respectively, thereby realizing segmented compensation of deformation. It effectively solves the problem of abnormal sag in different axial areas of the long cross-cutting blade, and can independently adjust the deformation of the middle and the two sides while maintaining the overall rotation accuracy of the blade barrel.

[0033] In this embodiment, please continue to refer to Appendix Figure 4-6 The cross-cutting tube 30 includes: The cylindrical component 301 has several axially equidistant paper feeding rollers 302 fixedly mounted on its annular sidewall, and adjacent paper feeding rollers 302 are connected by counterweights 304. The cross-cutting blade 303 is axially fixed to the outer wall of the cylindrical part 301 on the other side of the corresponding counterweight 304; There are two outer sleeves 305, and their first ends are inserted and fixed to the two free ends of the cylindrical part 301. The fixing method in this embodiment is that a number of locking slots 308 arranged in a ring array are radially provided on the annular sidewalls at both ends of the cylindrical part 301. Locking blocks 307 that are fixedly assembled with the outer sleeves 305 are inserted into the fixing slots 308. There are two transmission gears 306, each integrally formed on the second end of the outer sleeve 305.

[0034] In the above embodiment, the cylindrical component 30 is a cylindrical structure constituting the main body of the cross-cutting cylinder 30, serving as the mounting base for the paper feeding rollers 302 and the cross-cutting blade 303. The axially equidistantly distributed paper feeding rollers 302 form nodes for paperboard transport on the surface of the cylindrical component 301, with adjacent nodes connected by counterweights 304 to form a closed-loop structure. Furthermore, when the cylindrical component 301 rotates at high speed, the reverse centrifugal force generated by the counterweights 304 can counteract the lateral vibration caused by the uneven mass distribution of the cylindrical component 301 after the cross-cutting blade 303 is installed, thus balancing the mass distribution of the rotating system.

[0035] In this embodiment, please continue to refer to Appendix Figure 3 and 6At least one assembly bushing 309 is also fitted on the outer sleeve 305, and the assembly bushing 309 is fixedly assembled with the wall panel 202 by a number of bolts.

[0036] In the above embodiment, the assembly bushing 309 is fitted onto the outer sleeve 305 and fixed to the wall plate by bolts, forming a positioning constraint on the outer sleeve 305. This disperses the radial force on the outer sleeve 305 to the wall plate 201 during the meshing of the transmission gear 306, thus preventing displacement.

[0037] In this embodiment, please continue to refer to Appendix Figure 4 The inner spindle 40 is provided with a first assembly section 401, a first inner cavity section 402, a bearing assembly section 403, a second inner cavity section 404, and a second assembly section in sequence along its axial direction. The eccentric bearing component 80 is disposed in the bearing assembly section 403, and the diameter of the first inner cavity section 402 is larger than the diameter of the second inner cavity section 404. The second inner cavity section 404 is fitted with a first end abutting the bearing assembly section 403, and the second end of the fitting 405 is provided with a first locking sleeve 407 that is threadedly fitted to the second inner cavity section 404 to fix the assembly position of the fitting 405 and the eccentric bearing component 80.

[0038] In the above embodiment, the inner mandrel 40 achieves functional partitioning through an axial segmented structure. Ball bearings are installed in the first assembly section 401 and the second assembly section to support the rotation of the inner mandrel 40. The bearing assembly section 403 serves as the mounting location for the eccentric bearing component 80. Furthermore, to facilitate the assembly of the eccentric bearing component 80 in the bearing assembly section 403, the diameter of the second inner cavity section 404 is set smaller than the diameter of the first inner cavity section 402. This allows the eccentric bearing component 80 to be fitted onto one side of the second inner cavity section 404, and its axial position is positioned using the mounting sleeve 405 and the first locking sleeve 407, thus completing the overall assembly of the inner mandrel 40.

[0039] In this embodiment, both the first assembly section 401 and the second assembly section are fitted with ball bearing components 50 that are positioned and assembled with the inner cavity of the cross-cutting tube 30, and the first assembly section 401 and the second assembly section are also threaded with a second locking sleeve 60 for fixing the axial position of the ball bearing component 50.

[0040] In the above embodiment, the ball bearing component 50 is pressed into both ends of the inner cavity of the cross-cutting cylinder 30. Its outer ring is fixedly connected to the inner wall of the cylinder, and its inner ring is fixedly assembled with the first assembly section 401 and the second assembly section of the inner mandrel 40. When the cross-cutting cylinder 30 rotates at high speed, the ball bearing component 50 evenly transmits the radial load, avoiding direct contact and friction between the inner mandrel 40 and the cross-cutting cylinder 30. After the second locking sleeve 60 is screwed into the threaded section of the first assembly section 401 / second assembly section, its end face forms a surface contact with the end face of the inner ring of the ball bearing component. The preload of the ball bearing component 50 can be controlled by adjusting the tightening torque to prevent the ball bearing component 50 from moving axially.

[0041] In summary, the cross-cutting blade sag correction structure provided in this embodiment of the present invention, through the eccentric bearing component 80 set in the middle of the inner core shaft 40, can conveniently correct and adjust the abnormal sag in the middle of the cross-cutting blade cylinder 30 and the cross-cutting blade 303. At the same time, with the setting of the eccentric expansion sleeve unit 70, it can correct the abnormal sag on both sides of the lower cross-cutting blade cylinder 30 and the lower cross-cutting blade 303, thereby effectively solving the problem of incomplete cutting or rough edges caused by sag when cutting wide-width cardboard, and has the advantages of improving cutting accuracy and production efficiency.

[0042] Example 2 Embodiment 2 of this utility model provides a cross-cutting machine, including the cross-cutting blade sag correction structure of Embodiment 1.

[0043] Other undescribed structures are described in Example 1.

[0044] In summary, the cross-cutting blade sag correction structure and cross-cutting machine provided by this utility model embodiment can conveniently correct and adjust the abnormal sag in the middle of the cross-cutting blade cylinder 30 and the cross-cutting blade 303 through the eccentric bearing component 80 set in the middle of the inner core shaft 40. At the same time, with the setting of the eccentric expansion sleeve unit 70, it can correct the abnormal sag on both sides of the lower cross-cutting blade cylinder 30 and the lower cross-cutting blade 303, thereby effectively solving the problem of incomplete cutting or rough edges caused by sag when cutting wide paperboard, and has the advantages of improving cutting accuracy and production efficiency.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cross-cutting blade sag correction structure, characterized in that, include: The frame consists of two frames that are fixed in parallel on a base. The two frames have symmetrically arranged transmission cavities on their opposite sides, and wall panels are fixedly mounted on the free ends of the transmission cavities. There are two transverse cutting blades, which are arranged in parallel vertically upwards. Each of their two free ends is provided with a transmission gear that penetrates the wall plate and extends into the transmission cavity. The two transmission gears located on the same side mesh with each other. Two inner mandrels are respectively assembled in the inner cavity of the cross-cutting blade cylinder. At least one eccentric bearing is sleeved in the middle of the mandrel and rotates with the inner wall of the cross-cutting blade cylinder to adjust and correct the abnormal sag in the middle of the cross-cutting blade. Two eccentric expansion sleeve units are fixed to the two free ends of the inner mandrel located on the lower side to adjust and correct the abnormal sag on both sides of the cross-cutting blade on the lower side.

2. The cross-cutting blade sag correction structure as described in claim 1, characterized in that, The cross-cutting blade cylinder includes: The cylindrical component has several axially equidistant paper feeding rollers fixedly mounted on its annular sidewall, and adjacent paper feeding rollers are connected by counterweights. A cross-cutting blade is axially fixed to the outer wall of the cylindrical component on the opposite side of the counterweight block; The outer sleeve, in quantity two, has its first end inserted and fixed to the two free ends of the cylindrical component; The transmission gears are two in number and are integrally formed on the second end of the outer sleeve.

3. The cross-cutting blade sag correction structure as described in claim 2, characterized in that, Several locking slots arranged in a circular array are radially provided on the annular sidewalls at both ends of the cylindrical component, and locking blocks that are fixedly assembled with the outer sleeve are inserted into the fixing slots.

4. The cross-cutting blade sag correction structure as described in claim 2, characterized in that, At least one assembly bushing is also fitted onto the outer sleeve, and the assembly bushing is fixedly assembled with the wall panel by a number of bolts.

5. The cross-cutting blade sag correction structure as described in claim 2, characterized in that, The eccentric expansion sleeve unit includes: An inner expansion sleeve is fitted onto the free end of the inner mandrel, and a concave portion is formed on its outer side. An eccentric expansion sleeve is fitted onto the free end of the inner mandrel and axially connected to the inner expansion sleeve via several corrective bolts. An eccentric boss is formed in the middle of its inner side to match and insert with the annular concave surface to adjust and correct the abnormal sag on both sides of the cross-cutting blade.

6. The cross-cutting blade sag correction structure as described in claim 1, characterized in that, The inner mandrel is provided axially in sequence with a first assembly section, a first inner cavity section, a bearing assembly section, a second inner cavity section, and a second assembly section. The eccentric bearing component is disposed in the bearing assembly section, and the diameter of the first inner cavity section is larger than the diameter of the second inner cavity section. A first end of the assembly piece abutting against the bearing assembly section is sleeved on the second inner cavity section, and the second end of the assembly piece is provided with a first locking sleeve that is threadedly assembled with the second inner cavity section to fix the assembly position of the assembly piece and the eccentric bearing component.

7. The cross-cutting blade sag correction structure as described in claim 6, characterized in that, Both the first and second assembly sections are fitted with ball bearing components that are positioned and assembled with the inner cavity of the cross-cutting cylinder, and the first and second assembly sections are also threaded with second locking sleeves for fixing the axial position of the ball bearing components.

8. The cross-cutting blade sag correction structure as described in claim 1, characterized in that, One of the transmission gears is meshed with a drive gear, which is fixedly assembled to the output end of an external motor.

9. A cross-cutting machine, characterized in that, It includes the cross-cutting blade sag correction structure as described in any one of claims 1-8.

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