Servo pressure-free paper feeding equipment with self-adaptive adjustment function

Abstract

The invention discloses servo pressure-free paper feeding equipment with a self-adaptive adjusting function, relates to the technical field of paper conveying, and aims at solving the problem that in the conveying process of paper with different specifications, different materials and different production requirements, negative pressure is directly applied for air suction, and consequently stable and accurate conveying of the paper cannot be conducted without difference. When paper is fed in the paper feeding area, the paper is always subjected to the resultant force action of inclined air blowing and vertical air suction, after the gravity of the paper is counteracted, a suspended feeding state is achieved, and finally indifferent'pressure-free 'front edge paper feeding is achieved. According to the method, intelligent analysis is carried out through side displacement information and feeding speed information which are collected in real time to complete suspension control in the paper conveying process, and therefore the problem that in the paper conveying process of different specifications, different materials and different production requirements, negative pressure air suction is directly applied, and consequently indifference conveying cannot be carried out can be solved; and through intelligent conveying analysis, the paper jamming phenomenon can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of paper conveying, and in particular to a servo pressure-free paper conveying device with a self-adaptive adjustment function. Background Art

[0002] In the traditional printing or copying process, the paper often encounters the resistance of the roller and produces indentations, especially when running at high speeds. In addition, when the paper enters the printer or copier, it is easy to get a paper jam, resulting in interruptions in printing or copying and affecting efficiency.

[0003] However, in the process of paper transportation, it is inevitable that impurities such as paper scraps and dust will be generated. If these impurities cannot be removed in time, the paper feeding effect and the subsequent processing quality will be affected. In the prior art, a suction device is used to directly suck air through the suction port during the paper transportation process to remove impurities and dust on the surface of the paper. However, if negative pressure is directly applied during the paper transportation process, it will cause the paper to bend, deviate, or even jam. As a result, in the process of conveying paper with different specifications, different materials and different production requirements, it is impossible to perform intelligent, indiscriminate, stable and accurate transportation. For this reason, the present application proposes a solution. Summary of the invention

[0004] The purpose of the present invention is to provide a servo pressure-free paper feeding device with an adaptive adjustment function, which is used to solve the problem that directly applying negative pressure suction during the paper transportation process for different specifications, different materials and different production requirements makes it impossible to perform intelligent and indiscriminate stable and accurate paper transportation.

[0005] The objective of the present invention can be achieved through the following technical scheme: a servo pressure-free paper feeding device with adaptive adjustment function comprises a main rod body and a control panel embedded in the main rod body, a suction assembly is commonly arranged between the upper sides of a pair of the main rod body ends, the suction assembly comprises a suction plate and an inclined hole arranged perpendicularly to the main rod body, the inclined hole is opened on the suction plate and has an angle of forty-five degrees with the paper feeding direction, the suction plate is penetrated by the inclined hole and is installed with a suction pipe extending to the bottom, and a vertical plate arranged perpendicularly to the suction plate is installed at the bottom of the suction pipe; a paper feeding assembly is commonly arranged between the lower sides of a pair of the main rod body ends, the paper feeding assembly comprises a feeding paperboard arranged perpendicularly to the main rod body, a plurality of groups of paper feeding wheels are rotatably installed on the feeding paperboard, each of the paper feeding wheels penetrates the feeding paperboard and extends to the top and an air outlet is opened in the middle of the upper end of the outer ring surface.

[0006] It is further configured as follows: a pair of main rod bodies are symmetrically arranged and an upper and lower rod connected in a sliding manner are respectively installed at the upper and lower ends, and the two side ends of the upper and lower rods are respectively connected by an upper connecting frame and a lower connecting frame.

[0007] It is further configured as follows: a pull rod is installed laterally and slidingly in the middle of the upper and lower moving rods through an L-shaped plate, and cylinders whose output ends are connected to the pull rods are alternately installed at the outer ends of the upper and lower moving rods, and the ends of the pull rods are connected to springs fixedly connected to the upper connecting frame and the lower connecting frame respectively.

[0008] It is further configured as follows: a paper feeding assembly is installed at one end of a pair of main rod bodies close to the front side of the paper feeding direction, and the paper feeding assembly includes a paper feeding rod installed at the front end of the main rod body for common rotation, and the paper feeding rod passes through the main rod body and extends to the outside. Both ends are installed with bearing seats, and one end of the paper feeding rod passes through the bearing seat and is connected to a transmission gear connected to the driving structure.

[0009] It is further configured as follows: the horizontal position of the upper end of the outer ring side of the paper feed rod is below the bottom of the vertical plate, an arc-shaped guide plate is installed at the end of the suction plate close to the front side of the paper feed direction, and the lower end of the guide plate is tangent to the bottom side of the suction plate.

[0010] It is further configured as follows: support seats are installed on both sides of the bottom of the paper feeding paperboard, and an air supply rod with a hollow structure which is inserted into the paper feeding wheel is installed between a pair of the support seats. An exhaust port is opened inside the air supply rod corresponding to each paper feeding wheel, and a servo motor for driving the air supply rod to rotate is installed at the outer end of the support seat.

[0011] It is further configured as follows: a dust suction hole connected to the suction end of the vacuum cleaner is opened in the suction pipe, a lower opening connected to the dust suction hole is opened at the lower end of the suction pipe close to the vertical plate, and the lower opening is arranged parallel to the vertical plate.

[0012] It is further configured as follows: a connecting beam is commonly installed at the end portions of a pair of main rod bodies close to the front side of the paper feeding direction, and the lower side of the connecting beam is connected to the upper side of the air suction plate.

[0013] It is further configured that: an industrial control system is provided in the control panel, and the industrial control system includes a paper feeding parameter acquisition unit, a parameter analysis unit and an offset feedback execution unit, and the paper feeding parameter acquisition unit is used to acquire a paper feeding coefficient PGz in the paper feeding process, and the paper feeding coefficient PGz includes lateral displacement information and feeding speed information in the paper feeding process, and sends the paper feeding coefficient PGz to the parameter analysis unit to evaluate the paper feeding coefficient PGz, as follows:

[0014] S1: Acquire the lateral displacement information and feeding speed information during the paper delivery process, wherein the lateral displacement information is measured by a photoelectric sensor arranged on the outer peripheral side of the paper feeding rod, and the feeding speed information is obtained by numerical calculation based on the suction speed of the suction fan connected to the suction pipe and the blowing speed of the blower connected to the air supply rod;

[0015] S2: Construct the calculation formula of the partial feed coefficient PGz where v 吹 is the blowing speed of the blower, t is the interval time for the paper to pass through the paper feeding wheel and the lower opening at the same position, d2-d1 is the position offset measured by the photoelectric sensor, a and b are preset proportional coefficients, and a>b>0;

[0016] S3: the parameter analysis unit compares and analyzes the calculated bias coefficient PGz with the preset bias coefficient threshold, and generates a relevant signal to send to the offset feedback execution unit;

[0017] The offset feedback execution unit is used to perform extension and contraction control of the cylinder, rotation speed control of the servo motor, and wind speed control of the suction fan and the blower. The offset feedback execution unit executes actions according to the signal sent by the parameter analysis unit.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention aims at the problem that during the transportation process of papers of different specifications, different materials and different production requirements, directly applying negative pressure suction leads to the inability to intelligently and indiscriminately transport the papers stably and accurately; under the action of the gravity of the papers, the combined force of the oblique blowing and the vertical upward suction exerts a feeding force on the papers, so that when the papers are fed in the paper feeding area, they are always subjected to the combined force of the oblique blowing and the vertical suction, and after offsetting the gravity of the papers, they reach a suspended feeding state, and finally realize indiscriminate "pressure-free" front edge paper feeding, avoiding paper jams during paper transportation, and thus facilitating the smooth printing of the papers;

[0020] 2. The speed control during the pressure-free paper conveying process can be realized by the structural setting of the suction component and the paper feeding component with adjustable vertical overlapping positions. Specifically, when the cylinder starts to extend, the upper connecting frame and the lower connecting frame synchronously produce counterclockwise deflection during the process of the spring returning to its original length. At this time, the upper connecting frame drives the upper moving rod to deflect toward the front side of the feeding direction, and the lower connecting frame drives the lower moving rod to deflect toward the rear side of the feeding direction, that is, the paper feeding wheel and the lower opening on the suction pipe are driven to produce relative displacement. At this time, the time interval t of the paper passing through the air outlet on the paper feeding wheel and the upper and lower openings of the suction pipe is changed, that is, the speed of the paper during the pressure-free paper conveying process is reduced, and vice versa, the speed is increased;

[0021] 3. Through the intelligent industrial control system, the lateral displacement information and feed speed information collected in real time are combined and numerically calculated to obtain the deflection coefficient. The deflection coefficient is used for intelligent analysis to complete the suspension control during the paper conveying process, thereby avoiding the problem of indiscriminate conveying caused by directly applying negative pressure suction during the conveying of paper of different specifications, different materials and different production requirements. In addition, the intelligent conveying analysis can effectively avoid paper jams. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a structural schematic diagram of a servo pressure-free paper feeding device with an adaptive adjustment function proposed by the present invention;

[0024] Figure 2 A bottom view schematic diagram of a servo pressure-free paper feeding device with an adaptive adjustment function proposed by the present invention;

[0025] Figure 3 This is a disassembled diagram of the installation structure of the paper feeding assembly plate of the servo pressure-free paper feeding device with adaptive adjustment function proposed by the present invention;

[0026] Figure 4 A side cross-sectional view of a servo pressure-free paper feeding device with an adaptive adjustment function proposed by the present invention;

[0027] Figure 5 A cross-sectional view of a paper feeding wheel of a servo pressure-free paper feeding device with an adaptive adjustment function proposed by the present invention;

[0028] Figure 6 This is a schematic diagram of the installation of a paper feeding wheel assembly of a servo pressure-free paper feeding device with an adaptive adjustment function proposed by the present invention;

[0029] Figure 7 This is a structural diagram of the air suction component of the servo pressure-free paper feeding device with adaptive adjustment function proposed by the present invention;

[0030] Figure 8 It is a front view of the servo pressure-free paper feeding device with adaptive adjustment function proposed by the present invention;

[0031] Fig. 9 This is a side view of the servo pressure-free paper feeding device with adaptive adjustment function proposed by the present invention.

[0032] In the figure: 1, support assembly; 11, main rod body; 12, lower moving rod; 13, upper moving rod; 14, connecting beam; 15, upper connecting frame; 16, spring; 17, pull rod; 18, cylinder; 19, lower connecting frame;

[0033] 2. Air suction assembly; 21. Air suction plate; 22. Oblique hole; 23. Guide plate; 24. Air suction pipe; 25. Vertical plate; 26. Lower opening; 27. Dust suction hole;

[0034] 3. Paper feeding assembly; 31. Paper feeding paperboard; 32. Paper feeding wheel; 33. Air outlet; 34. Air supply rod; 35. Air exhaust; 36. Support seat; 37. Servo motor;

[0035] 4. Paper feed assembly; 41. Bearing seat; 42. Rotating rod; 43. Transmission gear; 44. Paper feed rod. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1: In view of the problem that directly applying negative pressure suction during the conveying process of paper with different specifications, different materials and different production requirements cannot ensure stable and accurate conveying of paper without distinction, the following technical solution is proposed:

[0038] Reference Figure 1 - Fig. 9 As shown, the servo pressure-free paper feeding device with adaptive adjustment function in this embodiment includes a main rod body 11 and a control panel embedded in the main rod body 11, and a suction assembly 2 is commonly arranged between the upper sides of the ends of a pair of main rod bodies 11. The suction assembly 2 includes a suction plate 21 and an inclined hole 22 arranged perpendicularly to the main rod body 11. The inclined hole 22 is opened on the suction plate 21 and has an angle of forty-five degrees with the paper feeding direction. The suction plate 21 is penetrated by the inclined hole 22 and is installed with a suction pipe 24 extending to the bottom, and a vertical plate 25 arranged perpendicularly to the suction plate 21 is installed at the bottom of the suction pipe 24; a paper feeding assembly 3 is commonly arranged between the lower sides of the ends of a pair of main rod bodies 11, and the paper feeding assembly 3 includes a feeding paperboard 31 arranged perpendicularly to the main rod body 11, and a plurality of groups of feeding wheels 32 are rotatably installed on the feeding paperboard 31, and each feeding wheel 32 penetrates the feeding paperboard 31 and extends to the top, and an air outlet 33 is opened in the middle of the upper end of the outer ring surface;

[0039] Reference Figure 6 and Figure 7 As shown, support seats 36 are installed on both sides of the bottom of the paper feeding paperboard 31, and an air supply rod 34 with a hollow structure inserted in the paper feeding wheel 32 is installed between a pair of support seats 36. The air supply rod 34 is provided with an exhaust port 35 corresponding to each paper feeding wheel 32. A servo motor 37 for driving the air supply rod 34 to rotate is installed at the outer end of the support seat 36. A dust suction hole 27 connected to the suction end of the vacuum cleaner is opened in the suction pipe 24. A lower opening 26 connected to the dust suction hole 27 is opened at the lower end of the suction pipe 24 close to the vertical plate 25, and the lower opening 26 is arranged parallel to the vertical plate 25.

[0040] Reference Figure 3 and Figure 4 As shown, a paper feed assembly 4 is installed at one end of a pair of main rod bodies 11 close to the front side of the paper feed direction, and the paper feed assembly 4 includes a paper feed rod 44 that is rotatably installed at the front end of the main rod body 11, and the paper feed rod 44 passes through the main rod body 11 and extends to both ends of the outside and is installed with a bearing seat 41, and one end of the paper feed rod 44 passes through the bearing seat 41 and is connected to a transmission gear 43 connected to the driving structure, and the horizontal position of the upper end of the outer ring side of the paper feed rod 44 is below the bottom of the vertical plate 25, and the end of the air suction plate 21 close to the front side of the paper feed direction is installed with an arc-shaped guide plate 23, and the lower end of the guide plate 23 is tangent to the bottom side of the air suction plate 21;

[0041] During paper feeding: the paper passes through the paper feed wheel 44 in sequence and tilts into the paper feed area under the guidance of the guide plate 23. Guided by the guide plate 23, the paper falls onto the paper feed wheel 32 in the paper feed area and is continuously supported by the paper feed wheel 44 in a step-by-step manner, thereby realizing continuous feeding;

[0042] A connecting beam 14 is commonly mounted on the end portions of the pair of main rod bodies 11 close to the front side in the paper feeding direction, and the lower side of the connecting beam 14 is connected to the upper side of the air suction plate 21 .

[0043] Basic principle: Through the stacked suction assembly and paper feeding assembly, the "pressure-free" front edge paper feeding in the paper conveying process is jointly realized, which is as follows: the paper passes through the paper feeding wheel 44 and is tilted into the paper feeding area under the guidance of the guide plate 23. At this time, the blower blows air into the paper feeding wheel 32 through the air supply rod 34, and the first group of paper feeding wheels 32 rotates at the same time. When the paper first contacts the first group of paper feeding wheels 32, a preliminary feeding is generated under the drive of the rotating first group of paper feeding wheels 32. The air outlet 33 after the deflection of the paper feeding wheel 32 is tilted to a 45° direction. At this time, the air outlet 33 forms a 45° oblique blowing on the paper. At the same time, the exhaust fan sucks air through the suction pipe 24, and the lower opening 26 and the vertical plate 25 form a vertical upward suction direction. Under the action of the gravity of the paper, the combined force of the oblique blowing and the vertical upward suction wind exerts a feeding force on the paper, and horizontal suspension feeding is realized in the paper feeding area;

[0044] During this process, the servo motor 37 drives the paper feeding wheel 32 to rotate. When the air outlet 33 on the paper feeding wheel 32 is deflected to an angle of 45°, the paper just runs to the bottom of the lower opening 26. Therefore, the paper position can be subjected to the combined force of the inclined blowing and the vertical suction, thereby achieving stable feeding. In addition, during the continuous feeding process, when the paper contacts the next set of paper feeding wheels 32, the servo motor 37 corresponding to the set of paper feeding wheels 32 is started, so that when the paper is fed in the paper feeding area, it is always subjected to the combined force of the inclined blowing and the vertical suction, and the paper weight is offset to achieve a suspended feeding state, thereby finally achieving indifferent "pressure-free" front edge paper feeding.

[0045] It should be noted that the setting of the suction component 3 can not only provide upward lifting during the pressure-free conveying of paper, but also complete the suction of impurities such as paper scraps and dust remaining on the surface of the paper during the conveying process, so as to avoid affecting the paper feeding effect and processing quality.

[0046] Embodiment 2: In view of the problem that the air suction component and the air blowing component cannot be adjusted, the following technical solution is proposed:

[0047] It comprises a pair of main rod bodies 11 which are symmetrically arranged and the upper and lower ends are respectively provided with an upper moving rod 13 and a lower moving rod 12 which are slidably connected to each other. The ends of the upper moving rod 13 and the lower moving rod 12 are respectively connected by an upper connecting frame 15 and a lower connecting frame 19. The middle parts of the upper moving rod 13 and the lower moving rod 12 are both laterally slidably provided with a pull rod 17 through an L-shaped plate. The outer ends of the upper moving rod 13 and the lower moving rod 12 are alternately provided with a cylinder 18 whose output end is connected to the pull rod 17. The ends of the pull rod 17 are connected with a spring 16 which is respectively fixedly connected to the upper connecting frame 15 and the lower connecting frame 19.

[0048] The upper and lower moving rods 13 and the lower moving rods 12 are respectively slidably arranged on the main rod body 11, and are adjustably connected through the upper connecting frame 15 and the lower connecting frame 19, and are both controlled by the cylinder 18 for extension and retraction. When the cylinder 18 starts to extend, the upper connecting frame 15 and the lower connecting frame 19 are synchronously deflected counterclockwise during the process of the spring 16 restoring its original length. At this time, the upper connecting frame 15 drives the upper moving rod 13 to deflect toward the front side of the feeding direction, and the lower connecting frame 19 drives the lower moving rod 12 to deflect toward the rear side of the feeding direction, that is, the paper feed wheel 32 and the lower opening 26 on the suction pipe 24 are driven to produce relative displacement, and the time interval t of the paper passing through the air outlet 33 on the paper feed wheel 32 and the upper and lower openings 26 of the suction pipe 24 is changed at this time, that is, the speed reduction in the process of pressure-free paper conveying is achieved;

[0049] Conversely, when the cylinder 18 starts to contract, it drives the spring 16 to complete the stretching, and the speed increase in the process of pressure-free paper conveying can be achieved by referring to the above.

[0050] Embodiment 3: This embodiment is based on the technical contents of Embodiment 1 and Embodiment 2, and further optimizes the pressure-free paper feeding process intelligently: an industrial control system is provided in the control panel, and the industrial control system includes a paper feeding parameter acquisition unit, a parameter analysis unit and an offset feedback execution unit. The paper feeding parameter acquisition unit is used to obtain the offset coefficient PGz in the paper delivery process, and the offset coefficient PGz includes the lateral displacement information and the feeding speed information in the paper delivery process, and sends the offset coefficient PGz to the parameter analysis unit to evaluate the paper offset coefficient PGz, as follows:

[0051] S1: Obtaining the lateral displacement information and feeding speed information during the paper delivery process, wherein the lateral displacement information is measured by a photoelectric sensor arranged on the outer peripheral side of the paper feeding rod 44, and the feeding speed information is obtained by numerically calculating the suction speed of the suction fan connected to the suction pipe 24 and the blowing speed of the blower connected to the air supply rod 34;

[0052] S2: Construct the calculation formula of the partial feed coefficient PGz where v 吹 is the blowing speed of the blower, t is the interval time for the same position of the paper to pass through the paper feeding wheel 32 and the lower opening 26, d2-d1 is the position offset measured by the photoelectric sensor, a and b are preset proportional coefficients, and a>b>0;

[0053] S3: the parameter analysis unit compares and analyzes the calculated bias coefficient PGz with the preset bias coefficient threshold, and generates a relevant signal to send to the offset feedback execution unit;

[0054] The offset feedback execution unit is used to control the extension and contraction of the cylinder 18, the speed of the servo motor 37, and the wind speed of the suction fan and the blower. The offset feedback execution unit performs the following actions according to the signal sent by the parameter analysis unit:

[0055] Action 1: When the bias coefficient PGz is less than the bias coefficient threshold, a suspension insufficient signal is generated and sent to the blower and the suction fan, so as to increase the air supply rate of the blower to the air supply rod 34 and the air suction rate of the suction fan through the suction pipe 24, thereby increasing the suspension height of the paper during transportation;

[0056] Action 2: When the bias coefficient PGz is greater than the bias coefficient threshold, a suspension too high signal is generated and sent to the blower and the suction fan, reducing the air supply rate of the blower to the air supply rod 34 and the air suction rate of the suction fan through the suction pipe 24, thereby reducing the suspension height of the paper during transportation;

[0057] Action 3: When the bias coefficient PGz is within the bias coefficient threshold, no signal is generated;

[0058] The effect is that during the pressure-free paper conveying process, the deflection coefficient is obtained through the comprehensive numerical calculation of the side displacement information and feeding speed information collected in real time, and the suspension control during the paper conveying process is completed by intelligent analysis of the deflection coefficient, thereby avoiding the problem of being unable to convey indiscriminately due to the direct application of negative pressure suction during the conveying process of paper of different specifications, different materials and different production requirements, and the intelligent conveying analysis can effectively avoid paper jams;

[0059] In summary: In combination with Example 1, Example 2 and Example 3, under the action of the gravity of the paper, the combined force of the oblique blowing and the vertical upward suction exerts a feeding force on the paper, so that when the paper is fed in the paper feeding area, it is always subjected to the combined force of the oblique blowing and the vertical suction, and the paper gravity is offset to reach a suspended feeding state, and finally the indiscriminate "pressure-free" front edge paper feeding is achieved, thereby avoiding paper jams during paper transportation, which is beneficial to the smooth printing of the paper; and the rate control during the pressure-free paper transportation can be achieved through the structural setting of the suction component and the paper feeding component with adjustable vertical overlapping position; finally, through the intelligent industrial control system, the bias feed coefficient is obtained through the comprehensive numerical calculation of the lateral displacement information and the feeding speed information collected in real time, and the suspension control during the paper transportation process is completed by the intelligent analysis of the bias feed coefficient, thereby avoiding the problem of indiscriminate transportation caused by directly applying negative pressure suction during the transportation of paper of different specifications, different materials and different production requirements, and the intelligent transportation analysis can effectively avoid the occurrence of paper jams.

[0060] The above formulas are obtained by collecting a large amount of data for software simulation and selecting a formula that is close to the actual value. The coefficients in the formula are set by technical personnel in this field according to actual conditions. The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited to this. Any technical personnel familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, make equivalent replacement or change, which should be covered within the protection scope of the present invention.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only specific implementation methods.

Claims

1. A servo pressure-free paper feeding device with an adaptive adjustment function, comprising a main rod body (11) and a control panel embedded in the main rod body (11), characterized in that: A suction assembly (2) is commonly arranged between the upper sides of the ends of a pair of main rod bodies (11), the suction assembly (2) comprising a suction plate (21) and an inclined hole (22) arranged perpendicularly to the main rod body (11), the inclined hole (22) being opened on the suction plate (21) and having an angle of forty-five degrees with the paper feeding direction, the suction plate (21) being penetrated by the inclined hole (22) and being provided with a suction pipe (24) extending downward, the bottom of the suction pipe (24) being provided with A vertical plate (25) is arranged perpendicularly to the air suction plate (21); a paper feeding assembly (3) is arranged between the lower sides of the ends of a pair of main rod bodies (11); the paper feeding assembly (3) comprises a paper feeding board (31) arranged perpendicularly to the main rod body (11); a plurality of groups of paper feeding wheels (32) are rotatably mounted on the paper feeding board (31); each of the paper feeding wheels (32) penetrates the paper feeding board (31) and extends upwards, and an air outlet (33) is provided in the middle of the upper end of the outer ring surface.

2. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 1 is characterized in that: A pair of main rod bodies (11) are symmetrically arranged and are provided with an upper moving rod (13) and a lower moving rod (12) which are slidably connected to each other at the upper and lower ends respectively. The ends of the upper moving rod (13) and the lower moving rod (12) are connected to each other via an upper connecting frame (15) and a lower connecting frame (19) respectively.

3. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 2 is characterized in that: A pull rod (17) is installed in the middle of the upper moving rod (13) and the lower moving rod (12) via an L-shaped plate for transverse sliding. Cylinders (18) whose output ends are connected to the pull rod (17) are installed alternately at the outer ends of the upper moving rod (13) and the lower moving rod (12). The ends of the pull rod (17) are connected to springs (16) fixedly connected to the upper connecting frame (15) and the lower connecting frame (19), respectively.

4. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 1, characterized in that: A paper feed assembly (4) is installed at one end of a pair of the main rod bodies (11) close to the front side of the paper feed direction, and the paper feed assembly (4) comprises a paper feed rod (44) which is rotatably installed at the front end of the main rod body (11), and the paper feed rod (44) passes through the main rod body (11) and extends to the outside, and both ends thereof are installed with bearing seats (41), and one end of the paper feed rod (44) passes through the bearing seat (41) and is connected to a transmission gear (43) connected to a driving structure.

5. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 4 is characterized in that: The horizontal position of the upper end of the outer ring side of the paper feeding rod (44) is below the bottom of the vertical plate (25), and an arc-shaped guide plate (23) is installed at the end of the air suction plate (21) close to the front side of the paper feeding direction, and the lower end of the guide plate (23) is tangent to the bottom side of the air suction plate (21).

6. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 1, characterized in that: Support seats (36) are installed on both sides of the bottom of the paper feeding paperboard (31), and an air supply rod (34) with a hollow structure and plugged into the paper feeding wheel (32) is installed between a pair of the support seats (36). An exhaust port (35) is opened inside the air supply rod (34) corresponding to each paper feeding wheel (32), and a servo motor (37) for driving the air supply rod (34) to rotate is installed at the outer end of the support seat (36).

7. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 1, characterized in that: A dust suction hole (27) connected to the suction end of the vacuum cleaner is provided in the suction pipe (24), and a lower opening (26) connected to the dust suction hole (27) is provided at the lower end of the suction pipe (24) close to the vertical plate (25), and the lower opening (26) is arranged parallel to the vertical plate (25).

8. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 1, characterized in that: A connecting beam (14) is installed together at the end portions of a pair of main rod bodies (11) close to the front side in the paper feeding direction, and the lower side of the connecting beam (14) is connected to the upper side of the air suction plate (21).

9. The servo pressure-free paper feeding device with adaptive adjustment function according to claim 1, characterized in that: The control panel is provided with an industrial control system, which includes a paper feeding parameter acquisition unit, a parameter analysis unit and an offset feedback execution unit. The paper feeding parameter acquisition unit is used to acquire a paper feeding coefficient PGz during paper feeding, wherein the paper feeding coefficient PGz includes lateral displacement information and feeding speed information during paper feeding, and sends the paper feeding coefficient PGz to the parameter analysis unit for evaluating the paper feeding coefficient PGz, as follows: S1: Acquiring lateral displacement information and feeding speed information during the paper delivery process, wherein the lateral displacement information is measured by a photoelectric sensor arranged on the outer peripheral side of the paper feeding rod (44), and the feeding speed information is obtained by numerically calculating the suction speed of the suction fan connected to the suction pipe (24) and the blowing speed of the blower connected to the air supply rod (34); S2: Construct the calculation formula of the partial feed coefficient PGz where v 吹 is the blowing speed of the blower, t is the interval time for the paper to pass through the paper feeding wheel (32) and the lower opening (26) at the same position, d2-d1 is the position offset measured by the photoelectric sensor, a and b are preset proportional coefficients, and a>b>0; S3: the parameter analysis unit compares and analyzes the calculated bias coefficient PGz with the preset bias coefficient threshold, and generates a relevant signal to send to the offset feedback execution unit; The offset feedback execution unit is used to control the extension and contraction of the cylinder (18), the rotation speed of the servo motor (37), and the wind speed of the suction fan and the blower. The offset feedback execution unit executes actions according to the signal sent by the parameter analysis unit.

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