CN217669559U

CN217669559U - Paper cutting mechanism

Info

Publication number: CN217669559U
Application number: CN202221659018.9U
Authority: CN
Inventors: 梁晓颖; 吴昕哲; 杨华龙; 张光辉
Original assignee: Dalian University Of Technology's Grand Equipments Design And Manufacture Zhengzhou Research Institute
Current assignee: Dalian University Of Technology's Grand Equipments Design And Manufacture Zhengzhou Research Institute
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-10-28
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a paper cutting mechanism, which comprises a worktable surface and a positioning component arranged on the worktable surface, wherein the positioning component comprises a positioning block and a first driving structure, the lower surface of the positioning block is closely attached to the upper surface of the worktable surface, and the positioning block is connected with the first driving structure so that the positioning block can horizontally move on the worktable surface along the left and right directions under the action of the first driving structure; the pressing assembly comprises a pressing plate and a second driving structure, and the pressing plate moves up and down relative to the workbench surface under the action of the second driving structure; the cutting assembly comprises an upper cutting knife, a lower cutting knife and a third driving structure, and the upper cutting knife moves up and down relative to the lower cutting knife under the action of the third driving structure; can carry out accurate location fixed to the paper before the paper cuts, avoid the paper to appear sliding when cutting, guarantee that the paper has higher cutting accuracy.

Description

Paper cutting mechanism

Technical Field

The utility model belongs to the technical field of paper cutting equipment, especially, relate to paper cutting mechanism.

Background

Office paper cutting mechanism can be divided into intelligent trimmer and manual trimmer, because intelligent trimmer cost is higher, and often accompanies driver, inductor trouble in the use, leads to intelligent trimmer to use when daily official working fewest. At present, the most common office paper cutter is still a manual paper cutter, the manual paper cutter is light in structure, simple to operate and low in cost, and is generally suitable for cutting a small amount of paper.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a paper cuts mechanism to solve a large amount of papers and cut the paper cutting precision that the in-process leads to and descend, the paper warp problem.

In order to achieve the above object, the utility model discloses a technical scheme that paper cutting mechanism adopted is:

paper cuts mechanism includes:

a working table surface: the worktable is used for being supported on the operating platform at intervals up and down, and the worktable surface is horizontally arranged;

a positioning assembly: the device comprises a positioning block and a first driving structure;

positioning a block: the positioning block is arranged in a manner of extending along the front-back direction, and the lower surface of the positioning block is tightly attached to the upper surface of the working table;

the first driving structure: the positioning block is arranged on the working table top and is connected with the first driving structure, so that the positioning block can translate on the working table top along the left-right direction under the action of the first driving structure;

the pressing component: the pressing plate and the second driving structure are included;

the second driving structure: the pressing plate is arranged on the working table surface and is arranged below the second driving structure;

the pressing plate is horizontally arranged compared with the working table top;

the pressing plate moves up and down relative to the working table under the action of the second driving structure;

cutting the assembly: comprises an upper cutting knife, a lower cutting knife and a third driving structure;

the third driving structure: the upper cutting knife is arranged on the working table surface, the upper cutting knife is arranged below the third driving structure, the lower cutting knife is fixed on the working table surface, the upper cutting knife and the lower cutting knife are arranged up and down correspondingly, and the upper cutting knife moves up and down relative to the lower cutting knife under the action of the third driving structure;

the worktable surface is provided with an avoiding groove at the position of the cutting component.

Has the beneficial effects that: the utility model discloses a paper cutting mechanism includes locating component, and locating component includes the locating piece that extends to set up along the fore-and-aft direction, and the lower surface of locating piece closely laminates with the upper surface of workstation, and the locating piece can be under the effect of first drive structure and left and right translation on table surface, so, support one side of the paper that waits to cut at the side of locating piece, the locating piece can be fixed a position the paper that waits to cut, make the paper that waits to cut can be ajusted on table surface; the pressing assembly comprises a pressing plate capable of moving up and down, the pressing plate moves downwards to enable paper to be cut to be pressed on the working table surface, and slippage of the paper to be cut before cutting is avoided. The cutting assembly can cut the paper including the last sword that cuts that can reciprocate, on cut the sword and move down and can cut the paper when cutting the sword and align with down, the utility model discloses in through locating component and the setting that compresses tightly the subassembly, can carry out accurate location to the paper before the paper cuts fixedly, avoid the paper to appear sliding when cutting, guaranteed that the paper has higher cutting accuracy.

Furthermore, the first driving structure comprises a screw rod, a fixed support and a guide structure, wherein the screw rod is arranged below the working table and is rotatably arranged relative to the working table, the fixed support is matched with the screw thread of the screw rod, and the guide structure is used for guiding the fixed support; the lead screw extends the setting along left right direction, one side of table surface is seted up and is run through from top to bottom and follow the logical groove that left right direction extends, the fixed bolster includes the L shape branch that passes in leading to the groove, and branch includes from leading to the groove and passes and follow the montant that upper and lower direction extends and set up in table surface top and along the horizontal pole that left right direction extends, and the horizontal pole is fixed in the top of montant, and the locating piece is for the one end fixed connection of keeping away from the montant of horizontal pole, montant and logical groove direction sliding fit.

Has the advantages that: through the screw rod and the fixing support rod matched with the screw thread of the screw rod, the rotary screw rod can enable the positioning block to translate on the working table top along the left-right direction through the fixing support rod, so that the position of the positioning block can adapt to cutting of paper with different widths; in addition, the guide structure can guide the movement of the fixed support, and moreover, the vertical rods of the supporting rods can also guide the movement of the fixed support through the guide sliding fit with the through grooves.

Further, lead to the groove and be equipped with two in the front and back direction interval, locating piece and two spinal branch fixed connection, fixed bolster still including set up the mobile jib that extends in the fore-and-aft direction in table surface below, both ends around the mobile jib are fixed respectively to the lower extreme of the montant of two spinal branches, offer on the mobile jib with the screw hole of lead screw thread adaptation.

Has the advantages that: the locating piece and two spinal branch fixed connection, and two spinal branches fix on the mobile jib, and the mobile jib is seted up with the screw hole of lead screw thread adaptation to in-process is controlled to the mobile jib about, two spinal branches can drive the stable translation about of locating piece on table surface.

The guide structure includes that the interval fixes two guide bars on the mobile jib and fixes the linear bearing in table surface below around, and the linear bearing is provided with two, and the guide bar extends the setting along left and right directions, linear bearing respectively with guide bar guide slip adaptation.

Has the advantages that: the guide structure is arranged to guide the left and right movement of the fixed support, so that the stability of the left and right movement of the fixed support is ensured, and the stability of the left and right movement of the positioning block is also ensured.

Further, the two through grooves are positioned between the two guide rods in the front-back direction.

Has the advantages that: the guide rod of front side can lead the fixed bolster in the place ahead of front side branch, and the guide rod of rear side can lead at the rear of rear side branch, has guaranteed the stability of fixed bolster when removing about.

One end of the screw rod is exposed out of one side of the working table and is fixed with a rotating handle.

Has the advantages that: the rotation of the screw rod can be conveniently realized by arranging the rotating handle.

The utility model discloses a cutting assembly, including table surface, left branch strut, right branch strut, left branch strut and right branch strut, table surface's front side is fixed with the fixing base, and the fixing base includes left branch strut and right branch strut, is fixed with two sets of installation components between left branch strut and the right branch strut, and the interval sets up around two sets of installation components, compress tightly the installation of subassembly on the installation component of rear side, cutting assembly installs on the installation component of front side.

Has the advantages that: the installation that can conveniently compress tightly subassembly and cutting assembly is set up to the fixing base.

Furthermore, each group of mounting assemblies comprises two optical axes which are arranged at intervals up and down, a rear guide seat is fixed on the second driving structure, the rear guide seat is in guide sliding fit with the two optical axes at the rear side, and a locking structure for fixing the rear guide seat relative to the optical axes is arranged on the rear guide seat; and a front guide seat is fixed on the third driving structure, the front guide seat is in guide sliding fit with the two optical axes on the front side, and a locking structure for fixing the front guide seat relative to the optical axes is arranged on the front guide seat.

Has the advantages that: the matching of the rear guide seat and the two optical axes at the rear side can conveniently realize the adjustment of the second driving structure in the left and right direction, thereby realizing the position adjustment of the compression plate in the left and right direction; the cooperation of two optical axes of preceding guide holder and front side can conveniently realize the ascending regulation in left and right sides of third drive structure to the position control of sword in left and right sides is cut in the realization.

Furthermore, the locking structure comprises a threaded hole formed in the front guide seat and the rear guide seat respectively and a stud matched with the threaded hole in a threaded manner, the opening of the threaded hole faces upwards, the threaded hole is communicated with a guide hole in the guide seat, and a rotating handle is fixed at the upper end of the stud.

Has the advantages that: the relative fixation of guide holder and optical axis can be realized to locking structure's setting to conveniently realize the position control of second drive structure and third drive structure in left and right directions.

Be fixed with first scale and second scale on the table surface, first scale is fixed on table surface's right side and is extended the setting along the fore-and-aft direction, and the second scale is fixed in table surface's front side and is extended the setting along left right direction, and first scale is connected with the second scale is perpendicular.

Has the advantages that: the arrangement of the second scale can respectively carry out marking measurement on the moving distances of the positioning block, the upper cutting knife and the pressing plate in the left and right directions; the first scale can mark the position of the pressure plate relative to the front and back direction of the paper to be cut before the paper is cut, so that the cutting position of the paper in the front and back direction can be determined.

Drawings

Fig. 1 is a schematic structural view of a paper cutting mechanism of the present invention;

FIG. 2 is a schematic diagram of the cutting assembly (not including the lower cutter) of the paper cutting mechanism of FIG. 1;

fig. 3 is a bottom view of the paper cutting mechanism of fig. 1.

Reference numerals are as follows: 1-a working table; 2-positioning blocks; 3-a cross bar; 4-through groove; 5-a second drive configuration; 6-optical axis; 7-a left support frame; 8-a locking structure; 9-front guide seat; 10-a compacting plate; 11-a right support frame; 12-a second scale; 13-a first scale; 16-upper cutting knife; 17-a third drive configuration; 18-a cutter fixing seat; 19-linear bearings; 20-a guide bar; 21-a rotating seat; 22-a rotating handle; 23-a lead screw; 26-a longitudinal bar; 27-avoidance groove; 28-main bar.

Detailed Description

The following describes in detail a specific embodiment of the paper cutting mechanism of the present invention with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1-3, the paper cutting mechanism of the present invention comprises a table top 1 supported on an operation table at an upper and a lower interval, the table top 1 is horizontally disposed, and legs are fixed at four corners of the table top 1, so that the table top 1 is supported on the operation table. The working table surface 1 is provided with a positioning component, a pressing component and a cutting component, and the positioning component can position paper to be cut so that the paper to be cut can be placed on the working table surface 1; the pressing assembly can press the paper to be cut on the working table top 1, so that the paper to be cut is prevented from sliding before cutting; the cutting assembly can cut paper, and can make the paper carry out accurate location fixed to the paper before cutting through locating component with compress tightly the subassembly, avoid the paper to appear sliding when cutting, guaranteed that the paper has higher cutting accuracy.

Specifically, locating component includes locating piece 2 and first drive structure, and locating piece 2 extends the setting along the fore-and-aft direction, and the cross-sectional shape of locating piece 2 is the rectangle, and the lower surface of locating piece 2 closely laminates with table surface 1's upper surface to prevent that the paper from following the roll-off between locating piece 2 and the table surface 1. The first driving structure is arranged on the working table top 1, and the positioning block 2 is connected with the first driving structure, so that the positioning block 2 can horizontally move on the working table top 1 along the left-right direction under the action of the first driving structure.

Specifically, the first driving structure comprises a screw 23 arranged below the working table top 1 and rotatably arranged relative to the working table top 1, a fixed support matched with the screw 23 in a threaded manner, and a guiding structure for guiding the fixed support; lead screw 23 extends along left and right sides direction and sets up, the fixed surface of table surface 1 is provided with two and rotates seat 21, two rotate seat 21 and control the interval and set up, both ends are the optical axis section about lead screw 23, two optical axis sections of lead screw 23 are inserted respectively and are established in two rotation seats 21 so that lead screw 23 can rotate the setting for rotating seat 21, the left end of lead screw 23 extends to left side of table surface 1 left side with, and, in order to facilitate the rotation of lead screw 23, the left end of lead screw 23 exposes and is fixed with twist grip 22 from table surface 1 one side. One side of the working table surface 1 is provided with a through groove 4 which penetrates through the working table surface from top to bottom and extends along the left-right direction, the opening of the through groove 4 is arranged towards the left, and in the embodiment, the through groove 4 is arranged in two at intervals from front to back.

The fixed bolster is including setting up in table surface 1 below, mobile jib 28 along the fore-and-aft direction extension, the fixed bolster still includes two L shape branches with mobile jib 28 fixed connection, branch includes from leading to groove 4 and passes and follow the montant of upper and lower direction extension and set up at table surface 1 top and follow the horizontal pole 3 that left right direction extends, horizontal pole 3 is fixed in the top of montant, the lower extreme and the perpendicular fixed connection of mobile jib 28 of montant, the fixed longitudinal rod 26 that extends along the fore-and-aft direction that is provided with of the one end of keeping away from the montant of two horizontal poles 3, locating piece 2 and longitudinal rod 26 fixed connection, thereby make locating piece 2 be located table surface 1's top, set up the screw hole with 23 screw thread adaptation on the mobile jib 28, the montant and the direction sliding fit that leads to groove 4 of branch, thereby when rotating twist grip 22, lead screw 23 rotates, under the guide effect of the montant of leading to groove 4 to branch, the fixed bolster removes along left right direction, thereby realize the translation of locating piece 2 on table surface 1.

In order to increase the stability of the positioning block 2 in translation, in this embodiment, a guiding structure for guiding the fixing support is further provided, the guiding structure includes two guiding rods 20 fixed on the main rod 28 at intervals in the front-back direction and two linear bearings 19 fixed below the working table 1, the two linear bearings 19 are provided, the guiding rods 20 extend in the left-right direction, the left ends of the guiding rods 20 are fixed to the main rod 28, and the linear bearings 19 are respectively in guiding sliding fit with the guiding rods 20. Two logical groove 4 are located between two guide bars 20 in the back and forth orientation, thereby guide bar 20 leads the removal of fixed bolster in table surface 1's below, lead to groove 4 and carry out the guided movement to the branch of fixed bolster, thus, even set up lead screw 23 in table surface 1 below, can drive the stable removal of fixed bolster about the orientation when also can guaranteeing lead screw 23 to rotate, also guarantee that locating piece 2 controls on table surface 1 steadily about, thereby can adjust the position of locating piece 2 according to the width of waiting to cut the paper, locating piece 2's setting effect is: one side of the paper to be cut is abutted against the side face of the positioning block 2, and the positioning block 2 can position the paper to be cut, so that the paper to be cut can be placed on the working table top 1.

In this embodiment, locating piece 2 adopts match steel material, and this kind of material has stronger creep resistance, geometric stability and self-lubricating nature, still can not cause the damage to table surface 1 because of rubbing too big when can closely laminate with table surface 1, has guaranteed that table surface 1 is smooth level and smooth to it keeps leveling when placing on table surface 1 to have guaranteed the paper.

For the installation that conveniently compresses tightly subassembly and cutting element, front side at table surface is fixed with the fixing base, the fixing base includes left branch strut 7 and right branch strut 11, left branch strut 7 is the same with the structure of right branch strut 11, all be the U-shaped body of frame, left branch strut 7 is fixed in 1 anterior left sides of table surface, right branch strut 11 is fixed on 1 anterior right sides of table surface, be fixed with two sets of installation components between left branch strut 7 and the right branch strut 11, interval setting around two sets of installation components, in the embodiment, compress tightly the installation component on the installation component of rear side, cutting element installs on the installation component of front side.

Specifically, every group installation component all includes two optical axes 6 that the interval set up from top to bottom. The compressing assembly comprises a compressing plate 10 and a second driving structure 5, in the embodiment, the second driving structure 5 is used for driving the air cylinder, the compressing plate 10 is fixed at the lower end of a piston rod of the driving air cylinder, the compressing plate 10 is horizontally arranged on the working table surface, the driving air cylinder is in working and can drive the compressing plate 10 to move up and down, the driving air cylinder drives the compressing plate 10 to provide uniform downward pressure, the paper is prevented from sliding in the cutting process, and the accuracy of the paper in the cutting process is ensured.

In order to facilitate the position adjustment of the pressing plate 10 according to the specification of the paper to be cut, in this embodiment, a rear guide seat is fixed on the rear side of a driving cylinder of the second driving structure 5, a guide hole is formed in the rear guide seat, the optical axis 6 penetrates through the guide hole and is in guide sliding fit with the guide seat, a locking structure 8 for fixing the rear guide seat relative to the optical axis 6 is arranged on the rear guide seat, the locking structure 8 comprises a threaded hole formed in the rear guide seat, the opening of the threaded hole faces upward, the threaded hole is communicated with the guide hole of the rear guide seat, a threaded bolt is adapted to the threaded hole, a rotating handle is fixed at the upper end of the threaded bolt, when the position of the second driving structure 5 needs to be adjusted, the rotating handle is screwed so that the lower end of the threaded bolt does not abut against the optical axis 6 any more, then the second driving structure 5 is adjusted along the extending direction of the optical axis 6, and is screwed again so that the lower end of the threaded bolt abuts against the optical axis 6 after the position adjustment, and the second driving structure 5 is fixed relative to two optical axes 6 on the rear side.

The cutting assembly comprises an upper cutting knife 16, a lower cutting knife and a third driving structure 17, the third driving structure 17 is arranged on the workbench, specifically, the third driving structure 17 is a driving cylinder, the upper cutting knife 16 is fixed at the lower end of a piston rod of the driving cylinder of the third driving structure 17 through a cutter fixing seat 18, the upper cutting knife 16 can move up and down under the action of the third driving structure 17, the upper cutting knife 16 extends along the left and right direction, the lower cutting knife is fixed on a fixed table board (not shown in the figure), the lower cutting knife extends along the left and right direction, and the length of the lower cutting knife in the left and right direction is longer, so that even if the upper cutting knife 16 moves left and right on the table board 1, the lower cutting knife can be ensured to correspond to the upper cutting knife 16 up and down in the up and down direction.

In order to facilitate the position adjustment of the upper cutting knife 16 according to the specification of the paper to be cut, in this embodiment, a front guide seat 9 is fixed on the rear side of a driving cylinder of a third driving structure 17, a guide hole is formed in the front guide seat 9, a front optical axis 6 passes through the guide hole and is in guide sliding fit with the guide seat, a locking structure 8 for fixing the front guide seat 9 relative to the optical axis 6 is arranged on the front guide seat 9, the locking structure 8 comprises a threaded hole formed in the front guide seat 9, the opening of the threaded hole faces upward, the threaded hole is communicated with the guide hole of the front guide seat 9, a threaded bolt is suitably arranged in the threaded hole, a rotating handle is fixed on the upper end of the threaded bolt, when the position of the third driving structure 17 needs to be adjusted, the rotating handle is screwed so that the lower end of the threaded bolt does not abut against the optical axis 6 any more, then the third driving structure 17 is adjusted in place, the handle is screwed again so that the lower end of the threaded bolt abuts against the optical axis 6, and the third driving structure 17 is fixed relative to the two optical axes 6 on the front side.

In order to facilitate the downward movement of the upper cutting blade 16 and the contact of the lower cutting blade to cut paper, and facilitate the falling of the cut paper from the working table top 1, in this embodiment, the working table top 1 is provided with an avoiding groove 27 at the position of the cutting component, the avoiding groove 27 is arranged at the front part of the working table top 1, the lower cutting blade is fixed under the avoiding groove 27, the upper cutting blade 16 moves downward, and the avoiding groove 27 is in contact with the lower cutting blade to cut the paper.

In this embodiment, the blade material of the upper cutting knife 16 is a tungsten steel knife, and the material has extremely strong wear resistance and hardness, so that the stability of a large amount of paper during cutting is ensured.

Be fixed with first scale 13 and second scale 12 on table surface 1, first scale 13 is fixed on table surface 1's right side and is extended the setting along the fore-and-aft direction, and second scale 12 is fixed in table surface 1's front side and is extended the setting along the left right direction, and first scale 13 is connected with second scale 12 is perpendicular. The second scale 12 is arranged to mark and measure the moving distances of the positioning block 2, the upper cutting knife 16 and the pressing plate 10 in the left-right direction; the first scale 13 is provided to mark the position of the pressure plate 10 in the front-rear direction with respect to the sheet to be cut before the sheet is cut, thereby determining the cut position of the sheet in the front-rear direction.

The utility model discloses a paper cutting mechanism is when using, earlier according to waiting to cut the paper in the position of the width adjustment locating piece 2 of left right direction, it is specific, rotate twist grip 22, lead screw 23 rotates, under the guide effect of leading to groove 4 to the montant of branch, and guide structure is to the guide effect of fixed bolster, the fixed bolster removes along controlling the direction, thereby the fixed bolster drives translation about locating piece 2 on table surface 1, move to and wait to cut the position of the width adaptation of paper until locating piece 2. Then the left side of the paper to be cut is abutted against the right side face of the positioning block 2, the cut paper is positioned and aligned through the positioning block 2, and the cut paper is prevented from sliding laterally. Then, the paper to be cut is moved to the positions of the pressing plate 10 and the upper cutting knife, the cutting position of the paper to be cut is located through the first scale 13, then the piston rod of the second driving structure 5 moves downwards, the pressing plate 10 tightly presses the paper to be cut on the working table top 1, then the piston rod of the third driving structure 17 moves downwards, the upper cutting knife is driven to move downwards and is in contact with the lower cutting knife, and the paper is cut.

In the above embodiment, the first driving structure includes a screw rod disposed below the working platform and rotatably disposed relative to the working platform, a fixing bracket adapted to a thread of the screw rod, and a guiding structure guiding the fixing bracket; the lead screw is arranged in a left-right extending mode, a through groove which penetrates through the lead screw up and down and extends in the left-right direction is formed in one side of the working table, the fixed support comprises an L-shaped supporting rod which penetrates through the through groove, the supporting rod comprises a vertical rod which penetrates through the through groove and extends in the up-down direction and a transverse rod which is arranged above the working table and extends in the left-right direction, the transverse rod is fixed above the vertical rod, the positioning block is fixedly connected with one end, far away from the vertical rod, of the transverse rod, and the vertical rod is in guiding sliding fit with the through groove; in other embodiments, the vertical rods of the fixing support and the through grooves can be in clearance fit, and the fixing support is guided by the guide structure; or the guide structure can also be omitted, and the vertical rod is in sliding fit with the through groove to guide the movement of the fixed support.

In the above embodiment, the through grooves are spaced apart from each other in the front-rear direction, the positioning blocks are fixedly connected with the two support rods, the fixing bracket further includes a main rod arranged below the working table and extending in the front-rear direction, the lower ends of the vertical rods of the two support rods are respectively fixed at the front and rear ends of the main rod, and the main rod is provided with a threaded hole matched with the screw thread of the lead screw; in other embodiments, the through groove can be further arranged in the front-back direction, the corresponding support rod is also arranged, at the moment, the main rod can not be arranged, and the lower end of the vertical rod of the support rod is provided with a threaded hole matched with the thread of the screw rod.

In the above embodiment, the two through grooves are located between the two guide rods in the front-rear direction; in other embodiments, the guide bar is located between the two through slots in the front-rear direction.

In the above embodiment, one end of the screw rod is exposed from one side of the working table and is fixed with the rotating handle; in other embodiments, the rotating handle may not be provided.

In the above embodiment, a fixing seat is fixed on the front side of the working table, the fixing seat includes a left support frame and a right support frame, two sets of mounting assemblies are fixed between the left support frame and the right support frame, the two sets of mounting assemblies are arranged at intervals in the front and back direction, the pressing assembly is mounted on the mounting assembly on the back side, and the cutting assembly is mounted on the mounting assembly on the front side; in other embodiments, the pressing assembly may be secured to the table top by a separate support frame and the cutting assembly may be secured to the table top by a separate support frame.

In the above embodiment, the worktable is fixed with the first scale and the second scale, the first scale is fixed on the right side of the worktable and extends in the front-back direction, the second scale is fixed on the front side of the worktable and extends in the left-right direction, and the first scale is vertically connected with the second scale; in other embodiments, the first and second scales may not be provided, and the position of each component may be determined by manual measurement.

Claims

1. Paper cuts mechanism, characterized by includes:

and (3) pressing the assembly: the pressing plate and the second driving structure are included;

2. The paper cutting mechanism as claimed in claim 1, wherein the first driving structure includes a lead screw disposed below the table surface and rotatably disposed with respect to the table surface, a fixing bracket adapted to a thread of the lead screw, and a guide structure for guiding the fixing bracket; the lead screw extends the setting along left right direction, one side of table surface is seted up and is run through from top to bottom and follow the logical groove that left right direction extends, the fixed bolster includes the L shape branch that passes in leading to the groove, and branch includes from leading to the groove and passes and follow the montant that upper and lower direction extends and set up in table surface top and along the horizontal pole that left right direction extends, and the horizontal pole is fixed in the top of montant, and the locating piece is for the one end fixed connection of keeping away from the montant of horizontal pole, montant and logical groove direction sliding fit.

3. The paper cutting mechanism according to claim 2, wherein the through grooves are spaced in the front-rear direction, the positioning blocks are fixedly connected with the two support rods, the fixing support further comprises a main rod arranged below the working table and extending in the front-rear direction, the lower ends of the vertical rods of the two support rods are respectively fixed at the front end and the rear end of the main rod, and threaded holes matched with threads of the lead screw are formed in the main rod.

4. A paper cutting mechanism as claimed in claim 3, wherein the guide structure includes two guide rods fixed to the main rod at intervals in the front-rear direction and two linear bearings fixed below the table surface, the guide rods extending in the left-right direction, the linear bearings being slidably fitted to the guide rods, respectively.

5. The paper cutting mechanism as claimed in claim 4, wherein the two through grooves are located between the two guide bars in the front-rear direction.

6. A paper cutting mechanism as claimed in any one of claims 2 to 5, wherein one end of the lead screw is exposed from the side of the table top and a rotary handle is fixed thereto.

7. A paper cutting mechanism as claimed in any one of claims 1-5, wherein the front side of the table top is fixed with a fixing base, the fixing base comprises a left support frame and a right support frame, two sets of mounting components are fixed between the left support frame and the right support frame, the two sets of mounting components are arranged at intervals in the front-back direction, the pressing component is mounted on the mounting component on the rear side, and the cutting component is mounted on the mounting component on the front side.

8. A paper cutting mechanism as claimed in claim 7, wherein each set of mounting assemblies includes two spaced apart optical axes, a rear guide is fixed to the second drive structure and slidably engaged with the two optical axes on the rear side, and a locking structure is provided on the rear guide to fix the rear guide relative to the optical axes; and a front guide seat is fixed on the third driving structure, the front guide seat is in guide sliding fit with the two optical axes on the front side, and a locking structure for fixing the front guide seat relative to the optical axes is arranged on the front guide seat.

9. The paper cutting mechanism as claimed in claim 8, wherein the locking structure includes a threaded hole and a stud matched with the threaded hole, the threaded hole is opened upward, the threaded hole is communicated with the guide hole in the guide holder, and a rotary handle is fixed on the upper end of the stud.

10. A paper cutting mechanism as claimed in any one of claims 1 to 5, wherein a first scale and a second scale are fixed on the table top, the first scale is fixed on the right side of the table top and extends in the front-rear direction, the second scale is fixed on the front side of the table top and extends in the left-right direction, and the first scale and the second scale are vertically connected.