Double-cutter cutting device of paper tube machine

Abstract

The utility model discloses a double-blade cutting device of a paper tube machine, relates to the paper tube machine, and aims to solve the problems that the single-blade cutting efficiency is lower, so that a larger stroke is required in single-time cutting, and frequent and quick back-and-forth movement is required in high-speed processing. Comprising a device frame, a pipe supporting mechanism and a cutter mechanism, the cutter mechanism comprises a reciprocating motion base, a driving blade assembly and a driven blade assembly, the reciprocating motion base is provided with a servo lead screw assembly, and the servo lead screw assembly is used for driving the driving blade assembly and the driven blade assembly to synchronously move in the opposite direction and the opposite direction. According to the double-blade cutting device of the paper tube machine, the driven blade assembly is additionally arranged to assist the driving blade assembly in accelerating cutting of a paper tube, the cutting efficiency is effectively improved, the stroke required by single-time cutting of the reciprocating motion seat is reduced, and the reciprocating motion seat does not need to rapidly move back and forth.

Description

Technical Field

[0001] The utility model relates to a paper tube machine, and more specifically, to a double-knife cutting device for a paper tube machine. Background Art

[0002] A paper tube machine is a special equipment for producing paper tubes, and the cutting device is an important component assembled on the paper tube machine for slitting to form paper tubes.

[0003] Regarding the cutting device, the applicant has applied for a multi-knife paper tube cutting device announced in a Chinese patent with the publication number CN103203766B. The technical key points are as follows: It includes a cutter device, a frame, a roller device, a cutting table moving device, and a vertical plate. The cutter device and the roller device are respectively arranged on the vertical plate. The cutting table moving device is connected to the frame. The cutter device includes a cutter head and a cutter head adjusting device. The cutter device and the roller device move through the cutting table moving device. The roller device includes a roller rotating mechanism and a roller adjusting mechanism.

[0004] In the above technical solution, a single cutter device is cut by one cutter. It is found in actual use that during the cutting process, it is necessary to maintain the same moving speed as the paper tube. When producing paper tubes with a larger diameter, due to the low cutting efficiency of a single knife, a larger stroke is required for a single cut, and thus it is necessary to move back and forth frequently and quickly during high-speed processing.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a double-knife cutting device for a paper tube machine. By adding a driven blade assembly to assist the active blade assembly in accelerating the cutting of the paper tube, the cutting efficiency is effectively improved, the required stroke of the reciprocating motion seat for a single cut is reduced, and there is no need for the reciprocating motion seat to move back and forth quickly.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions: A double-knife cutting device for a paper tube machine includes a device frame, a tube supporting mechanism arranged on the device frame, and a cutter mechanism reciprocating along the tube supporting mechanism. The cutter mechanism includes a reciprocating motion seat, an active blade assembly, and a driven blade assembly. The reciprocating motion seat is provided with a servo lead screw assembly, and the servo lead screw assembly is used to drive the active blade assembly and the driven blade assembly to move synchronously towards and away from each other.

[0008] By adopting the above technical solution, the paper tube made by the paper tube machine is pushed forward along the tube supporting mechanism. During the forward movement, the reciprocating movement seat carries the active blade assembly and the driven blade assembly and advances at the same speed as the paper tube being made. At the same time, the active blade assembly and the driven blade assembly are synchronously driven by the servo screw rod assembly to move towards each other, so as to cut simultaneously on both sides of the paper tube, achieving the technical effect of halving the cutting time; after the cutting is completed, the servo screw rod assembly drives the active blade assembly and the driven blade assembly to retreat and reset, and the reciprocating movement seat carries the active blade assembly and the driven blade assembly to retreat and reset, waiting for the next section of the paper tube to be cut; in summary, by adding a driven blade assembly in this application, it assists the active blade assembly to accelerate the cutting of the paper tube, effectively improving the cutting efficiency, reducing the required stroke of the reciprocating movement seat for a single cutting, and eliminating the need for the reciprocating movement seat to move back and forth quickly.

[0009] The present utility model is further configured as: the tube supporting mechanism includes two mutually parallel tube supporting assembly beams, and a tube supporting roller rotatably connected to the tube supporting assembly beam by bearings. The two tube supporting rollers are cooperatively and tangentially supported on the lower arc surface of the outer circumferential surface of the paper tube.

[0010] The present utility model is further configured as: two outer sides of the two tube supporting assembly beams are respectively provided with two side roller fixing blocks. The side roller fixing blocks are vertically fixed with side roller vertical shafts, and the side roller vertical shafts are connected with side shift limiting rollers by bearings.

[0011] The present utility model is further configured as: the tube supporting mechanism further includes a height adjusting component. The height adjusting component includes a lifting seat connected to the device frame by two sliders, a lifting screw sleeve arranged on the lifting seat, and a lifting screw rod threadedly engaged with the lifting screw sleeve; the device frame is provided with a driving gear shaft, and driving gears are respectively arranged at both ends of the driving gear shaft. A driven gear meshing with the corresponding driving gear is arranged at the bottom end of the lifting screw rod; a hand wheel is fixed at any end of the driving gear shaft.

[0012] The present utility model is further configured as: a motor plate is arranged on the lower surface of the device frame, and a first motor is installed on the motor plate; a reciprocating driving screw rod is rotatably installed on the connecting seat of the device frame, and a reciprocating driving screw sleeve threadedly engaged with the reciprocating driving screw rod is arranged on the reciprocating movement seat; a pulley assembly is arranged for transmission between the output shaft of the first motor and the reciprocating driving screw rod.

[0013] The present utility model is further configured as: the active blade assembly includes a slider mounting seat connected to the reciprocating movement seat by a slide rail slider, a cutter mounting seat fixed to the slider mounting seat, a clamping knife shaft rotatably connected to the cutter mounting seat, an active cutter with a shaft cover mounted at one end of the clamping knife shaft, and a second motor torsionally connected to the other end of the clamping knife shaft; the driven blade assembly includes a slider mounting seat, a cutter mounting seat, a clamping knife shaft, and a driven cutter. A deep groove ball bearing is arranged between the cutter mounting seat and the clamping knife shaft.

[0014] The utility model is further configured as follows: the servo screw assembly includes a positive screw and a negative screw connected by a coupling, and a servo motor for providing torque; the positive screw thread is matched with a positive screw sleeve, the positive screw sleeve is fixed to the slider mounting seat of the active blade assembly, and the negative screw thread is matched with a negative screw sleeve, the negative screw sleeve is fixed to the slider mounting seat of the driven blade assembly; a synchronous pulley assembly is arranged between the servo motor and the positive screw or the negative screw for transmission.

[0015] In summary, the utility model has the following beneficial effects: the application adds a driven blade assembly to assist the active blade assembly to accelerate the cutting of the paper tube, thereby effectively improving the cutting efficiency and reducing the required stroke of the reciprocating seat for a single cut, without the need for the reciprocating seat to move back and forth quickly; the trustee mechanism reduces the friction resistance to the rotation of the paper tube to ensure that the paper tube completes an angle rotation of more than 360° during the cutting process, thereby ensuring the complete cutting of the paper tube; limits the lateral deviation of the paper tube to ensure that it moves along the straight direction of the trustee mechanism; adjusts the height of the two trustee rollers through the height adjustment assembly to ensure that the center lines of paper tubes of different diameters are coplanar with the center line of the active blade assembly, thereby achieving a more effective technical effect of cutting paper tubes of different diameters; and simultaneously transmits two lifting screws to ensure that the two rotate synchronously and at the same speed, thereby effectively preventing the trustee rollers from tilting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a schematic diagram of the structure of the custodian agency part of this application;

[0018] Figure 3 This is a schematic diagram of the structure of the cutter mechanism of this application;

[0019] Figure 4 This is a schematic diagram of the structure of the active blade assembly of this application;

[0020] Figure 5 This is a schematic structural diagram of the driven blade assembly of the present application.

[0021] Description of the drawings: 1. Device frame; 2. Reciprocating seat; 3. Trusteeship assembly beam; 4. Trusteeship roller; 5. Side roller fixing block; 6. Side roller vertical shaft; 7. Side shift limiting roller; 8. Lifting seat; 9. Lifting screw sleeve; 10. Lifting screw rod; 11. Driving gear shaft; 12. Driving gear; 13. Driven gear; 14. Handwheel; 15. Motor plate; 16. First motor; 17. Reciprocating drive screw rod; 18. Reciprocating drive screw sleeve; 19. Pulley assembly; 20. Slide block mounting seat; 21. Cutter mounting seat; 22. Knife clamping shaft; 23. Active cutter; 24. Second motor; 25. Driven cutter; 26. Deep groove ball bearing; 27. Right-hand thread screw rod; 28. Left-hand thread screw rod; 29. Servo motor; 30. Right-hand thread screw sleeve; 31. Left-hand thread screw sleeve; 32. Synchronous belt pulley assembly. Detailed implementation mode

[0022] The present utility model will be further described in detail below with reference to the drawings.

[0023] A double-knife cutting device for a paper tube machine, as Figure 1 shown, includes a device frame 1, a trusteeship mechanism arranged on the device frame 1, and a cutter mechanism reciprocating along the trusteeship mechanism. The cutter mechanism includes a reciprocating seat 2, an active cutting edge assembly, and a driven cutting edge assembly. The reciprocating seat 2 is provided with a servo screw rod assembly for driving the active cutting edge assembly and the driven cutting edge assembly to move towards and away from each other synchronously.

[0024] During normal operation of this embodiment, the paper tube made by the paper tube machine is pushed forward along the trusteeship mechanism. During the forward movement, the reciprocating seat 2 carries the active cutting edge assembly and the driven cutting edge assembly and advances at the same speed as the made paper tube. At the same time, the servo screw rod assembly synchronously drives the active cutting edge assembly and the driven cutting edge assembly to move towards each other, so as to cut both sides of the paper tube simultaneously, achieving the technical effect of halving the cutting time. After the cutting is completed, the servo screw rod assembly drives the active cutting edge assembly and the driven cutting edge assembly to retreat and reset, and the reciprocating seat 2 carries the active cutting edge assembly and the driven cutting edge assembly to retreat and reset, waiting for the next section of the paper tube to be cut. To sum up, by adding a driven cutting edge assembly in this application, it assists the active cutting edge assembly to accelerate the cutting of the paper tube, effectively improving the cutting efficiency and reducing the required stroke of the reciprocating seat 2 for a single cutting, without the need for the reciprocating seat 2 to move back and forth quickly.

[0025] The specific structure of the trusteeship mechanism is as follows, as Figure 1 、 Figure 2As shown in the figure, the hosting mechanism includes two mutually parallel hosting assembly beams 3, and hosting rollers 4 rotatably connected to the hosting assembly beams 3 by bearings. The two hosting rollers 4 are cooperatively and tangentially supported on the lower arc surface of the outer circumferential surface of the paper tube. During the actual cutting process, at the initial stage of cutting, the paper tube is driven to rotate by the tube-making method (paper curling tube-making) of the paper tube machine. At this time, the active blade assembly and the driven blade assembly perform cutting normally. When the cutting amount is large, the rotational force of the paper tube is provided jointly by the active blade assembly and the tube-making method. The purpose of adopting the above structure for the hosting mechanism is to reduce the frictional resistance suffered by the rotation of the paper tube, so as to ensure that the paper tube completes an angular rotation of more than 360° during the cutting process and ensure the complete cutting of the paper tube.

[0026] To ensure that the paper tube is always at the midline of the active blade assembly and the driven blade assembly, as Figure 1 , Figure 2 shown, two side roller fixing blocks 5 are bolted and fixed to the outer sides of the two hosting assembly beams 3 respectively. A side roller vertical shaft 6 is vertically fixed to the side roller fixing block 5, and a side shift limiting roller 7 is connected to the side roller vertical shaft 6 by a bearing, thereby restricting the mobility of the lateral offset of the paper tube and ensuring that it advances along the straight line direction of the hosting mechanism.

[0027] To adapt to paper tubes with different outer diameters, as Figure 2 shown, the hosting mechanism further includes a height adjustment component. The height adjustment component includes two lifting seats 8 connected to the device frame 1 by sliders, a lifting screw sleeve 9 fixed to the lifting seat 8, and a lifting screw rod 10 threadedly engaged with the lifting screw sleeve 9. By rotating the lifting screw rod 10 in different directions, the height of the lifting seat 8 can be adjusted through the cooperation with the lifting screw sleeve 9, so as to adjust the height of the two hosting rollers 4 by the lifting seats 8 supporting the two ends of the hosting assembly beam 3, and further ensure that the midlines of paper tubes with different diameters are coplanar with the midline of the active blade assembly, achieving the technical effect of more effectively cutting paper tubes with different diameters.

[0028] The two lifting screw rods 10 are synchronously rotated at a constant speed in the following manner. As Figure 2 shown, a driving gear shaft 11 is rotatably installed on the device frame 1 by a bearing. Two driving gears 12 are key-fixed to the two ends of the driving gear shaft 11 respectively. A driven gear 13 meshing with the corresponding driving gear 12 is key-fixed to the bottom end of the lifting screw rod 10. The two lifting screw rods 10 are simultaneously driven through the driving gear shaft 11, the two driving gears 12 and the two driven gears 13, ensuring their synchronous rotation at a constant speed and effectively preventing the hosting rollers 4 from tilting.

[0029] It should be noted that, as Figure 2 shown, a handwheel 14 is fixed to any end of the driving gear shaft 11, thereby providing a force application point for rotating the driving gear shaft 11. In other embodiments, the driving gear shaft 11 can also be rotated by a motor.

[0030] In this embodiment, the reciprocating motion seat 2 is driven in the following manner. As Figure 3 shown, a motor plate 15 is provided on the lower surface of the device frame 1, and a first motor 16 is installed on the motor plate 15; a reciprocating drive lead screw 17 is rotatably installed on the connecting seat of the device frame 1, and a reciprocating drive nut 18 that is threadedly engaged with the reciprocating drive lead screw 17 is provided on the reciprocating motion seat 2; a pulley assembly 19 is provided for transmission between the output shaft of the first motor 16 and the reciprocating drive lead screw 17; when it is necessary to drive the reciprocating motion seat 2, after being transmitted by the pulley assembly 19 from the first motor 16, the rotation of the reciprocating drive lead screw 17 is controlled, so that a screw propulsion force is generated by the cooperation between the reciprocating drive lead screw 17 and the reciprocating drive nut 18, thereby driving the displacement of the reciprocating motion seat 2.

[0031] It should be noted that in other embodiments, a servo electric cylinder, a cylinder, etc. can also be used to drive the reciprocating motion seat 2.

[0032] The specific structure of the active cutting edge assembly is as follows. As Figure 1 、 Figure 4 shown, the active cutting edge assembly includes a slider mounting seat 20 with a slide rail and slider connected to the reciprocating motion seat 2, a cutter mounting seat 21 fixed to the slider mounting seat 20, a clamping knife shaft 22 rotatably connected to the cutter mounting seat 21, an active cutter 23 with an end cover mounted on one end of the clamping knife shaft 22, and a second motor 24 torsionally connected to the other end of the clamping knife shaft 22; the active cutter 23 is driven to rotate by the second motor 24 via the clamping knife shaft 22, thereby meeting the technical requirement of the active cutting edge assembly for actively cutting the paper tube.

[0033] The specific structure of the driven cutting edge assembly is as follows. As Figure 5 shown, the driven cutting edge assembly includes a slider mounting seat 20, a cutter mounting seat 21, a clamping knife shaft 22, and a driven cutter 25. A deep groove ball bearing 26 is provided between the cutter mounting seat 21 and the clamping knife shaft 22, thereby meeting the technical requirement of the driven cutter 25 for passive rotation.

[0034] The specific structure of the servo lead screw assembly is as follows. As Figure 1 、 Figure 3As shown in the figure, the servo lead screw assembly includes a right-hand lead screw 27 and a left-hand lead screw 28 connected by a coupling, and a servo motor 29 for providing torque; the right-hand lead screw 27 is in threaded engagement with a right-hand nut 30, and the right-hand nut 30 is fixed to the slider mounting seat 20 of the active cutting edge assembly. The left-hand lead screw 28 is in threaded engagement with a left-hand nut 31, and the left-hand nut 31 is fixed to the slider mounting seat 20 of the driven cutting edge assembly; a synchronous pulley assembly 32 is provided for transmission between the servo motor 29 and the right-hand lead screw 27 or the left-hand lead screw 28; when the servo lead screw assembly is working normally, after the servo motor 29 is driven by the synchronous pulley assembly 32, the right-hand lead screw 27 and the left-hand lead screw 28 are synchronously driven to rotate, so as to respectively cooperate with the right-hand nut 30 and the left-hand nut 31 to generate a screw propulsion force, thereby achieving the technical requirement of synchronously and isodromically driving the active cutting edge assembly and the driven cutting edge assembly to move towards or away from each other.

[0035] The specific embodiments are only explanations of the present invention, and they do not limit the present invention. After reading this specification, those skilled in the art can make modifications to the embodiments without creative contributions according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A double-knife cutting device for a paper tube machine, comprising a device frame (1), a trustee mechanism arranged on the device frame (1), and a cutting mechanism reciprocating along the trustee mechanism, characterized in that: The cutting mechanism comprises a reciprocating seat (2), an active blade assembly and a driven blade assembly, wherein the reciprocating seat (2) is provided with a servo screw assembly, and the servo screw assembly is used to drive the active blade assembly and the driven blade assembly to move synchronously towards and away from each other.

2. A double-knife cutting device for a paper tube machine according to claim 1, characterized in that: The trustee mechanism comprises two trustee assembly beams (3) parallel to each other, and a trustee roller (4) rotatably connected to the trustee assembly beams (3) via a bearing, and the two trustee rollers (4) cooperate to be tangentially supported on the lower arc surface of the outer circumference of the paper tube.

3. A double-knife cutting device for a paper tube machine according to claim 2, characterized in that: Two side roller fixing blocks (5) are respectively arranged on the outer side surfaces of the two hosting assembly beams (3); a side roller vertical shaft (6) is vertically fixed to the side roller fixing blocks (5); and a side displacement limiting roller (7) is bearing-connected to the side roller vertical shaft (6).

4. A double-knife cutting device for a paper tube machine according to claim 2, characterized in that: The trusteeship mechanism also includes a height adjustment component, which includes a lifting seat (8) connected to the device frame (1) with two sliders, a lifting screw sleeve (9) arranged on the lifting seat (8), and a lifting screw rod (10) threadedly matched with the lifting screw sleeve (9); The device frame (1) is provided with a driving gear shaft (11), and driving gears (12) are respectively provided at both ends of the driving gear shaft (11), and a driven gear (13) meshing with the corresponding driving gear (12) is provided at the bottom end of the lifting screw rod (10); A hand wheel (14) is fixed to any end of the driving gear shaft (11).

5. The double-knife cutting device for a paper tube machine according to claim 1, characterized in that: A motor plate (15) is provided on the lower surface of the device frame (1), and a first motor (16) is installed on the motor plate (15); The device frame (1) connecting seat is rotatably mounted with a reciprocating drive screw rod (17), and the reciprocating motion seat (2) is provided with a reciprocating drive screw sleeve (18) threadably matched with the reciprocating drive screw rod (17); A pulley assembly (19) is provided between the output shaft of the first motor (16) and the reciprocating drive screw (17) for transmission.

6. A double-knife cutting device for a paper tube machine according to claim 1, characterized in that: The active blade assembly comprises a slide block connected to a slide mounting seat (20) of a reciprocating seat (2), a cutter mounting seat (21) fixed to the slide mounting seat (20), a cutter clamping shaft (22) rotatably connected to the cutter mounting seat (21), an active cutter (23) with a shaft cover mounted on one end of the cutter clamping shaft (22), and a second motor (24) torsionally connected to the other end of the cutter clamping shaft (22); The driven blade assembly comprises a slider mounting seat (20), a cutter mounting seat (21), a clamping knife shaft (22), and a driven cutter (25); a deep groove ball bearing (26) is provided between the cutter mounting seat (21) and the clamping knife shaft (22).

7. A double-knife cutting device for a paper tube machine according to claim 6, characterized in that: The servo screw assembly comprises a positive thread screw (27) and a negative thread screw (28) connected by a coupling, and a servo motor (29) for providing torque; The positive threaded rod (27) is threadedly matched with a positive threaded sleeve (30), and the positive threaded sleeve (30) is fixed to the slider mounting seat (20) of the active blade assembly; the negative threaded rod (28) is threadedly matched with a negative threaded sleeve (31), and the negative threaded sleeve (31) is fixed to the slider mounting seat (20) of the driven blade assembly; A synchronous pulley assembly (32) is provided between the servo motor (29) and the positive threaded screw (27) or the negative threaded screw (28) for transmission.

Images