Lance adjustment mechanism for a tongue

Abstract

The utility model discloses a tongue mouth pre bayonet adjusting mechanism, including base frame, a plurality of guide paper roll, conveying roller, rubber roller, servo motor, bayonet shaft and pre bayonet drive motor, and the both ends of bayonet shaft are rotatedly connected with transmission side wallboard and operation side wallboard respectively, is provided with pre bayonet strip on the bayonet shaft, and pre bayonet drive motor is installed on transmission side wallboard, and is connected bayonet shaft for driving bayonet shaft rotation, and the both ends of bayonet shaft are respectively covered transmission side slide sleeve and operation side slide sleeve, and transmission side slide sleeve is rotatedly connected with transmission side wallboard, and operation side slide sleeve is rotatedly connected with operation side wallboard, and bayonet shaft can be axially moved relative to transmission side slide sleeve and operation side slide sleeve, and one end of bayonet shaft located transmission side wallboard is connected with pre bayonet drive motor spline.

Description

Technical Field

[0001] This utility model relates to a tongue pre-piercing knife adjustment mechanism, belonging to the technical field of tongue pocket manufacturing equipment. Background Technology

[0002] The tongue pre-piercing knife is an important component of the paper tape machine. The existing tongue pre-piercing knife, as disclosed in Chinese invention patent application CN116278186A, has two ends of its bottom roller rotatably connected to the breakpoint frame, and one end connected to the drive motor. The bottom roller of this structure cannot move axially, and it cannot pre-pierce at different positions on the tongue bag as needed. If the installation position of the breakpoint knife on the bottom roller is changed, the adjustment is inconvenient and time-consuming. Summary of the Invention

[0003] The purpose of this invention is to provide a tongue pre-piercing knife adjustment mechanism to solve the technical defect of the existing tongue pre-piercing knife adjustment mechanism, which cannot pre-pierce at a suitable position on the paper of the tongue pocket according to actual needs because the position of the pre-piercing knife strip cannot be moved.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a tongue pre-piercing adjustment mechanism, including a base frame, multiple guide rollers, a conveying roller, a rubber roller, a servo motor, a piercing shaft, and a pre-piercing drive motor. The base frame includes a transmission side wall plate, an operating side wall plate, and a support. The transmission side wall plate and the operating side wall plate are parallel. The two ends of the support are respectively fixedly connected to the transmission side wall plate and the operating side wall plate. The two ends of the guide roller are respectively rotatably connected to the transmission side wall plate and the operating side wall plate, and are used to guide the paper conveying in the use state. The two ends of the conveying roller are respectively rotatably connected to the transmission side wall plate and the operating side wall plate. The two ends of the rubber roller are respectively connected to the transmission side wall plate and the operating side wall plate. The operating side wall plate is rotatably connected, and the servo motor is mounted on the transmission side wall plate to drive the conveyor roller and rubber roller to rotate. The two ends of the bayonet shaft are rotatably connected to the transmission side wall plate and the operating side wall plate, respectively. A pre-bayonet strip is provided on the bayonet shaft. The pre-bayonet drive motor is mounted on the transmission side wall plate and connected to the bayonet shaft to drive the bayonet shaft to rotate. The two ends of the bayonet shaft are respectively fitted with a transmission side sliding sleeve and an operating side sliding sleeve. The transmission side sliding sleeve is rotatably connected to the transmission side wall plate, and the operating side sliding sleeve is rotatably connected to the operating side wall plate. The bayonet shaft can move axially relative to the transmission side sliding sleeve and the operating side sliding sleeve. The end of the bayonet shaft located on the transmission side wall plate is splinedly connected to the pre-bayonet drive motor. In this invention, the bayonet shaft can move axially, and the pre-bayonet strips mounted on the bayonet shaft can move synchronously with it. By moving the pre-bayonet strips, pre-bayoneting can be performed at appropriate positions on the paper according to actual needs, making this invention applicable to different sizes of flap bags. This invention can perform pre-bayoneting processing of flap bags of different sizes simply by moving the bayonet shaft axially. After adjustment, the relative positions between the pre-bayonet strips on the bayonet shaft can remain unchanged, making adjustment convenient and requiring less time, thus improving the overall processing efficiency of flap bags.

[0005] As a further improvement of this utility model, it also includes a connecting sleeve and a splined shaft. The connecting sleeve is fixed to one end of the bayonet shaft located on the transmission side wall plate. The connecting sleeve is provided with an internal spline. The splined shaft is connected to the pre-bayonet drive motor. The splined shaft extends into the connecting sleeve and engages with the splined joint of the connecting sleeve. When the bayonet shaft moves axially, the connecting sleeve moves relative to the splined shaft. This utility model, through the splined engagement between the splined shaft and the connecting sleeve, ensures that the bayonet shaft will not disengage from the pre-bayonet drive motor during axial movement.

[0006] As a further improvement of this utility model, it also includes a threaded sleeve and an adjusting nut. The threaded sleeve is fitted onto the bayonet shaft at one end of the operating side wall plate and is fixedly connected to the operating side wall plate. The bayonet shaft can move relative to the threaded sleeve. The threaded sleeve is provided with external threads, and the adjusting nut is open at one end and provided with internal threads. The adjusting nut is threadedly engaged with the threaded sleeve. A through hole is opened at the end of the adjusting nut away from the transmission side wall plate. The end of the bayonet shaft extends out of the through hole, and its two sides are rotatably connected to the adjusting nut by plane bearings. Tightening the adjusting nut is used to push or pull the bayonet shaft to move axially. This utility model, through the cooperation of the threaded sleeve and the adjusting nut, allows the bayonet shaft to move axially when the adjusting nut is tightened because the position of the threaded sleeve is fixed. This facilitates the movement and adjustment of the bayonet shaft.

[0007] As a further improvement of this utility model, it also includes a first motor base and a first reducer. The first motor base is mounted on the transmission side wall plate, and the first reducer is mounted on the first motor base. The output shaft of the first reducer is used to connect to the bayonet shaft. The pre-bayonet drive motor is mounted on the first reducer, and the output shaft of the pre-bayonet drive motor is connected to the input shaft of the first reducer. This utility model provides a first motor base to facilitate the installation of the pre-bayonet drive motor and the first reducer. The first reducer reduces the speed of the pre-bayonet drive motor and then drives the bayonet shaft, making the speed of the bayonet shaft moderate.

[0008] As a further improvement of this utility model, it also includes a transmission side end cover, which is sleeved on the bayonet shaft and fixed on the transmission side wall plate near the operation side wall plate. The transmission side end cover is provided with a transmission side annular protrusion for abutting against the transmission side bearing that rotatably connects the bayonet shaft and the transmission side wall plate.

[0009] As a further improvement of this utility model, it also includes an operating side end cover, which is sleeved on the bayonet shaft and fixed on the side of the operating side wall plate near the transmission side wall plate. The operating side end cover is provided with an operating side annular protrusion for abutting against the operating side bearing that rotatably connects the bayonet shaft and the operating side wall plate.

[0010] As a further improvement of this utility model, it also includes guide rails, sliders, and adjusting screws. There are two guide rails, respectively mounted on the transmission side wall and the operating side wall, with their positions corresponding to each other. Each guide rail has a slider that can slide horizontally on the guide rail. The two ends of the rubber roller are rotatably connected to the two sliders. An adjusting screw is rotatably mounted on each of the opposing sides of the transmission and operating side walls. The adjusting screw passes through an adjusting plate fixed to the slider and is threaded into the adjusting plate. Rotating the adjusting screw drives the slider to slide on the guide rail. This utility model, through the relative sliding of the slider and the guide rail, allows the rubber roller to move relative to the bayonet shaft, adjusting the distance between them to achieve the optimal pre-piercing effect.

[0011] As a further improvement of this utility model, it also includes an adjusting block and a copper sleeve. The adjusting block is fixed on the slider, and the copper sleeve is installed on the adjusting block and can contact the guide rail to eliminate the gap between the slider and the guide rail. This utility model uses the adjusting block to install the copper sleeve on the slider, and the contact between the copper sleeve and the guide rail makes the slider slide more smoothly on the guide rail.

[0012] As a further improvement of this utility model, it also includes a gear seat, a driving gear, a driven gear, a first driven pulley, a first conveyor belt, a swing arm, and a tensioning wheel. The gear seat is fixed on the transmission side wall plate. The driving gear is rotatably connected to the gear seat via a gear shaft, which passes through the transmission side wall plate and connects to the servo motor. A first driving pulley, coaxial with the driving gear, is fixedly mounted on the driving gear. The driven gear is mounted on the conveyor roller at one end of the transmission side wall plate and meshes with the driving gear. The first driven pulley is mounted on the rubber roller at one end near the transmission side wall plate. The first conveyor belt connects the first driving pulley and the first driven pulley. One end of the swing arm is rotatably mounted on the transmission side wall plate, and the tensioning wheel is rotatably mounted on the other end of the swing arm. The tensioning wheel presses down on the first conveyor belt to keep it in a taut state. This utility model uses gear transmission and a conveyor belt to allow one servo motor to simultaneously drive the rubber roller and the conveyor roller to rotate. The tensioning wheel keeps the first conveyor belt taut when the rubber roller moves.

[0013] As a further improvement of this utility model, it also includes a second motor base, a second reducer, a second driven pulley, and a second conveyor belt. The second motor base is mounted on the transmission side wall plate, the second reducer is mounted on the second motor base, and a second driving pulley is mounted on its output shaft. The output shaft of the servo motor is connected to the input shaft of the second reducer. The second driven pulley is mounted on the gear shaft, and the second conveyor belt connects the second driving pulley and the second driven pulley. This utility model connects the servo motor and the gear shaft via the second conveyor belt, thus expanding the installation range of the servo motor.

[0014] In summary, the beneficial effects of this utility model are: this utility model can adjust the bayonet shaft axially as needed, and adjust the pre-bayonet strip on the bayonet shaft to the pre-bayonet position on the paper. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the base frame in this utility model.

[0017] Figure 3 This is the front view of this utility model.

[0018] Figure 4 yes Figure 3A cross-sectional view of AA (excluding the bayonet shaft, guide roller, and conveyor roller).

[0019] Figure 5 This is a schematic diagram of the bayonet shaft in this utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the servo motor driving the rubber roller and the conveying roller in this utility model.

[0021] The components include: 1. Base frame; 101. Transmission side wall plate; 102. Operation side wall plate; 103. Support; 2. Guide roller; 3. Conveyor roller; 4. Glue roller; 5. Servo motor; 6. Bayonet shaft; 7. Pre-bayonet strip; 8. Pre-bayonet drive motor; 9. Transmission side sliding sleeve; 10. Operation side sliding sleeve; 11. Connecting sleeve; 12. Splined shaft; 13. Threaded sleeve; 14. Adjusting nut; 15. Flat bearing; 16. First motor base; 17. First reducer; 18. Transmission side end cover; 19. Transmission side annular protrusion; 20. Transmission side bearing; 21. Operation side end cover; 2 2. Operating side annular protrusion; 23. Operating side bearing; 24. Guide rail; 25. Slider; 26. Adjusting screw; 27. Adjusting plate; 28. Adjusting block; 29. ​​Copper sleeve; 30. Gear seat; 31. Driving gear; 32. First driving pulley; 33. Driven gear; 34. First driven pulley; 35. First conveyor belt; 36. Swing arm; 37. Tensioner; 38. Second motor seat; 39. Second reducer; 40. Second driving pulley; 41. Second driven pulley; 42. Second conveyor belt; 43. Bearing lock nut; 44. Screw seat; 45. Handwheel. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Example 1

[0023] like Figure 1 , Figure 3 and Figure 4 The tongue-and-mouth pre-piercing adjustment mechanism shown includes a base frame 1, multiple guide rollers 2, a conveying roller 3, a rubber roller 4, a servo motor 5, a piercing shaft 6, and a pre-piercing drive motor 8.

[0024] like Figure 2As shown, the base frame 1 includes a transmission side wall plate 101, an operation side wall plate 102, and three supports 103. The transmission side wall plate 101 and the operation side wall plate 102 are parallel. The two ends of the supports 103 are respectively fixedly connected to the transmission side wall plate 101 and the operation side wall plate 102 in parallel. The bottom of the operation side wall plate 102 and the three supports 103 are fixedly connected by two supports 103, and the upper part of the operation side wall plate 102 and the three supports 103 are fixedly connected by one support 103. Both ends of the guide roller 2 are rotatably connected to the drive side wall plate 101 and the operation side wall plate 102 respectively by guide roller bearings, and are used to guide the paper conveying in the use state. Both ends of the conveying roller 3 are rotatably connected to the drive side wall plate 101 and the operation side wall plate 102 respectively by conveying roller bearings. Both ends of the rubber roller 4 are rotatably connected to the drive side wall plate 101 and the operation side wall plate 102 respectively. The servo motor 5 is mounted on the drive side wall plate 101 and is used to drive the conveying roller 3 and the rubber roller 4 to rotate simultaneously, wherein the rotation directions of the conveying roller 3 and the rubber roller 4 are opposite.

[0025] like Figure 1 and Figure 3 As shown, in this embodiment, the two ends of the bayonet shaft 6 are rotatably connected to the transmission side wall plate 101 and the operation side wall plate 102, respectively. Figure 5 As shown, a pre-bayonet strip 7 is provided on the bayonet shaft 6. The pre-bayonet strip 7 and its installation structure with the bayonet shaft 6 in this embodiment are existing technologies and will not be described in detail in this embodiment. The pre-bayonet drive motor 8 in this embodiment is installed on the transmission side wall plate 101 and connected to the bayonet shaft 6 to drive the bayonet shaft 6 to rotate. The pre-bayonet strip 7 in this embodiment rotates with the bayonet shaft 6 and is used to pierce holes in the paper conveyed by the rubber roller 4.

[0026] like Figure 5 As shown, in this embodiment, a transmission side sliding sleeve 9 and an operating side sliding sleeve 10 are respectively fitted at both ends of the bayonet shaft 6. The transmission side sliding sleeve 9 is rotatably connected to the transmission side wall plate 101, and the operating side sliding sleeve 10 is rotatably connected to the operating side wall plate 102. The bayonet shaft 6 can move axially relative to the transmission side sliding sleeve 9 and the operating side sliding sleeve 10. In this embodiment, the diameter of the bayonet shaft 6 is slightly smaller than the inner diameter of the transmission side sliding sleeve 9 and the operating side sliding sleeve 10, so that the bayonet shaft 6 can move axially relative to the transmission side sliding sleeve 9 and the operating side sliding sleeve 10. In this embodiment, the bayonet shaft 6 is connected to the transmission side sliding sleeve 9 and the operating side sliding sleeve 10 by a flat key. Under the drive of the pre-bayonet drive motor 8, it can rotate relative to the transmission side wall plate 101 and the operating side wall plate 102. In this embodiment, the bayonet shaft 6 is splined to the transmission side wall plate 101 at one end, so that the bayonet shaft 6 does not disengage from the pre-bayonet drive motor 8 when moving axially. In this embodiment, the bayonet shaft 6 can move axially, so the pre-bayonet strip 7 in this embodiment can move horizontally accordingly, thereby punching holes in the appropriate position on the paper for making the tongue pocket as needed.

[0027] like Figure 5 As shown, the specific structure for spline connection between bayonet shaft 6 and pre-bayonet drive motor 8 in this embodiment is as follows: This embodiment is provided with a connecting sleeve 11 and a spline shaft 12. The connecting sleeve 11 is detachably installed on one end of the bayonet shaft 6 located on the transmission side wall plate 101 by bolts along the axial direction of the bayonet shaft 6. An internal spline is provided on the connecting sleeve 11. The spline shaft 12 is connected to the pre-bayonet drive motor 8. The end of the spline shaft 12 away from the pre-bayonet drive motor 8 extends into the connecting sleeve 11 and engages with the spline of the connecting sleeve 11. When the bayonet shaft 6 moves axially, the connecting sleeve 11 moves accordingly, and the spline shaft 12 moves axially relative to the connecting sleeve 11 within the connecting sleeve 11.

[0028] like Figure 5 As shown, to facilitate the axial movement of the bayonet shaft 6, this embodiment includes a threaded sleeve 13 and an adjusting nut 14. The threaded sleeve 13 is fitted onto the bayonet shaft 6 at one end of the operating side wall plate 102. The inner diameter of the threaded sleeve 13 is larger than the diameter of the bayonet shaft 6, allowing the bayonet shaft 6 to move axially within the threaded sleeve 13. The threaded sleeve 13 is detachably mounted on the operating side wall plate 102 away from the transmission side wall plate 101 using multiple bolts. External threads are provided on the threaded sleeve 13. One end of the adjusting nut 14 is open and has internal threads. The threaded sleeve 13 extends into the adjusting nut 14 through the opening, and the adjusting nut 14 is threadedly engaged with the threaded sleeve 13. A through hole is provided at one end away from the transmission side wall plate 101. The diameter of the through hole is smaller than the diameter of the bayonet shaft 6. A fixing part with a diameter smaller than the diameter of the bayonet shaft 6 is provided at the end of the bayonet shaft 6. The diameter of the fixing part is smaller than the diameter of the through hole and extends out of the through hole. A plane bearing 15 is provided on both sides of the fixing part located at the adjusting nut 14. The fixing part and the adjusting nut 14 are rotatably connected by the plane bearing 15. A bearing locking nut 43 is provided at one end of the fixing part that extends out of the adjusting nut 14 to prevent the plane bearing 15 from moving axially on the fixing part, thereby pressing the adjusting nut 14 onto the bayonet shaft 6. Tightening the adjusting nut 14 is used to push or pull the bayonet shaft 6 to move axially.

[0029] like Figure 5 As shown, this embodiment includes a first motor mount 16 and a first reducer 17. The first motor mount 16 is detachably mounted on the transmission side wall plate 101 with multiple bolts, and the first reducer 17 is detachably mounted on the first motor mount 16 with multiple bolts. The output shaft of the first reducer 17 is used to connect to the bayonet shaft 6. In this embodiment, the spline shaft 12 is connected to the output shaft of the first reducer 17 using an elastic coupling. The pre-bayonet drive motor 8 is mounted on the first reducer 17, and the output shaft of the pre-bayonet drive motor 8 is connected to the input shaft of the first reducer 17 using an elastic coupling.

[0030] like Figure 5 As shown, this embodiment includes a transmission-side end cap 18 and an operating-side end cap 21. The transmission-side end cap 18 is sleeved on the bayonet shaft 6 and detachably mounted on the transmission-side wall plate 101 near the operating-side wall plate 102 using multiple bolts. A transmission-side annular protrusion 19 is provided on the side of the transmission-side end cap 18 away from the operating-side wall plate 102. The transmission-side annular protrusion 19 is used to abut against the transmission-side bearing 20 that rotatably connects the bayonet shaft 6 and the transmission-side wall plate 101. The operating-side end cap 21 is sleeved on the bayonet shaft 6 and fixed on the side of the operating-side wall plate 102 near the transmission-side wall plate 101. An operating-side annular protrusion 22 is provided on the side of the operating-side end cap 21 away from the transmission-side wall plate 101. The operating-side annular protrusion 22 is used to abut against the operating-side bearing 23 that rotatably connects the bayonet shaft 6 and the operating-side wall plate 102.

[0031] like Figure 1 , Figure 3 and Figure 6 As shown, the structure for the servo motor 5 to simultaneously drive the conveyor roller 3 and the rubber roller 4 to rotate in this embodiment is as follows: This embodiment includes a gear seat 30, a driving gear 31, a driven gear 33, a first driven pulley 34, a first conveyor belt 35, a swing arm 36, and a tensioning wheel 37. The gear seat 30 is detachably bolted to the transmission side wall plate 101. The driving gear 31 is rotatably connected to the gear seat 30 via a gear shaft that passes through and is rotatably connected to the gear seat 30. The gear shaft passes through the transmission side wall plate 101 and is connected to the servo motor 5. A first driving pulley 32, coaxial with the driving gear 31, is fixedly mounted on the end of the driving gear 31 away from the transmission side wall plate 101. The driven gear... The driven gear 33 is fixed on the conveyor roller 3 at one end of the transmission side wall plate 101. The driven gear 33 meshes with the driving gear 31. The first driven pulley 34 is set on the rubber roller 4 at one end near the transmission side wall plate 101. The first conveyor belt 35 connects the first driving pulley 32 and the first driven pulley 34. The servo motor 5 drives the driving gear 31 to rotate. The driven gear 33 meshing with the driving gear 31 and the first driving pulley 32 mounted on the driving gear 31 rotate synchronously. The conveyor roller 3 rotates synchronously with the rotation of the driven gear 33. The first driving pulley 32 drives the first driven pulley 34 to rotate through the first conveyor belt 35. The rubber roller 4 rotates synchronously with the rotation of the first driven pulley 34.

[0032] like Figure 1As shown, this embodiment includes a second motor base 38, a second reducer 39, a second driven pulley 41, and a second conveyor belt 42. The second motor base 38 is detachably bolted onto the transmission side wall plate 101. The second reducer 39 is mounted on the second motor base 38. A second driving pulley 40 is mounted on the output shaft of the second reducer 39. The output shaft of the servo motor 5 is connected to the input shaft of the second reducer 39. The second driven pulley 41 is mounted on a gear shaft. The second conveyor belt 42 connects the second driving pulley 40 and the second driven pulley 41. The servo motor 5 drives the driving gear 31 to rotate via the second conveyor belt 42, and the driving gear 31 then drives the conveyor roller 3 and the rubber roller 4 to rotate. Example 2

[0033] This embodiment is a further improvement on Embodiment 1. Compared to Embodiment 1, this embodiment includes a guide rail 24, a slider 25, and an adjusting screw 26, as follows: Figure 1 and Figure 6 As shown, there are two guide rails 24, which are detachably mounted on the transmission side wall plate 101 and the operation side wall plate 102 respectively by multiple bolts. The two guide rails 24 are positioned opposite each other on the transmission side wall plate 101 and the operation side wall plate 102. Each guide rail 24 is provided with a slider 25 that slides with it. The slider 25 can slide horizontally on the guide rail 24. The two ends of the rubber roller 4 are rotatably connected to the two sliders 25 by bearings. On the opposite side of the transmission side wall plate 101 and the operation side wall plate 102, an adjusting screw 26 is rotatably provided by a screw seat 44. The adjusting screw 26 passes through the adjusting plate 27 fixed to the bottom of the slider 25 and is threadedly engaged with the adjusting plate 27. A handwheel 45 is provided at the end of the adjusting screw 26. The adjusting screw 26 is rotated by the handwheel 45 to drive the slider 25 to slide on the guide rail 24.

[0034] like Figure 6As shown, this embodiment includes an adjusting block 28 and a copper sleeve 29. The adjusting block 28 is detachably mounted on the slider 25 using bolts. The adjusting block 28 is located above the guide rail 24. The copper sleeve 29 is mounted on the adjusting block 28 and can contact the guide rail 24 to eliminate the gap between the slider 25 and the guide rail 24. To coordinate the movement of the rubber roller 4, this embodiment includes a swing arm 36 and a tension wheel 37. One end of the swing arm 36 is rotatably mounted on the transmission side wall plate 101 via a swing shaft. The tension wheel 37 is rotatably mounted on the other end of the swing arm 36 via a wheel axle. In this embodiment, an elastic element is provided on the swing shaft. The elastic element can be a torsion spring sleeved on the swing shaft. The elastic element ensures that the swing arm 36 always has a downward swing tendency. When the rubber roller 4 moves horizontally and the tension of the first conveyor belt 35 changes, the tension wheel 37 presses down on the first conveyor belt 35 to keep the first conveyor belt 35 in a taut state. The structure of the remaining parts in this embodiment is the same as in Embodiment 1. For details, please refer to Embodiment 1. This embodiment will not be described in detail.

[0035] Unless otherwise specified in the above description, all parts are existing technology or can be implemented using existing technology. Furthermore, the specific embodiments described in this utility model are merely preferred embodiments of the invention and are not intended to limit the scope of this utility model. That is, all equivalent changes and modifications made within the scope of this utility model patent should be considered within the technical scope of this utility model.

Claims

1. The pre-bayonet adjustment mechanism includes... The base frame includes a transmission side wall plate, an operating side wall plate, and a support. The transmission side wall plate and the operating side wall plate are parallel, and the two ends of the support are fixedly connected to the transmission side wall plate and the operating side wall plate, respectively, in parallel. Multiple paper guide rollers, with both ends of each roller rotatably connected to the drive side wall plate and the operating side wall plate, are used to guide the paper conveying during use. The conveyor roller has two ends that are rotatably connected to the drive side wall plate and the operating side wall plate, respectively. The rubber roller has two ends that are rotatably connected to the transmission side wall plate and the operation side wall plate, respectively. Servo motor, mounted on the transmission side wall plate, is used to drive the conveyor roller and rubber roller to rotate; The bayonet shaft has two ends that are rotatably connected to the transmission side wall plate and the operation side wall plate, respectively, and a pre-bayonet bar is provided on the bayonet shaft. A pre-bayonet drive motor is mounted on the transmission side wall plate and connected to the bayonet shaft to drive the bayonet shaft to rotate. Its features are: The bayonet shaft is fitted with a transmission side sliding sleeve and an operating side sliding sleeve at both ends. The transmission side sliding sleeve is rotatably connected to the transmission side wall plate, and the operating side sliding sleeve is rotatably connected to the operating side wall plate. The bayonet shaft can move axially relative to the transmission side sliding sleeve and the operating side sliding sleeve. The bayonet shaft is splined to the pre-bayonet drive motor at one end of the transmission side wall plate.

2. The tongue-and-mouth pre-piercing knife adjustment mechanism according to claim 1, characterized in that: Also includes A connecting sleeve is fixed to one end of the transmission side wall plate on the bayonet shaft, and an internal spline is provided on the connecting sleeve. The splined shaft is connected to the pre-bayonet drive motor. The splined shaft extends into the connecting sleeve and engages with the splined connection of the connecting sleeve. When the bayonet shaft moves axially, the connecting sleeve moves relative to the splined shaft.

3. The tongue-and-mouth pre-stabbing adjustment mechanism according to claim 1, characterized in that: Also includes A threaded sleeve is fitted onto one end of the operating side wall plate on the bayonet shaft, and the threaded sleeve is fixedly connected to the operating side wall plate. The bayonet shaft can move relative to the threaded sleeve, and the threaded sleeve is provided with external threads. The adjusting nut has an open end with an internal thread. The adjusting nut is threaded into the threaded sleeve. The end of the adjusting nut away from the transmission side wall plate has a through hole. The end of the bayonet shaft extends out of the through hole, and its two sides are rotatably connected to the adjusting nut by plane bearings. Tightening the adjusting nut is used to push or pull the bayonet shaft to move axially.

4. The tongue-and-mouth pre-piercing knife adjustment mechanism according to claim 1, characterized in that: Also includes The first motor mount is installed on the transmission side wall plate; The first reducer is mounted on the first motor base. The output shaft of the first reducer is used to connect the bayonet shaft. The pre-bayonet drive motor is mounted on the first reducer. The output shaft of the pre-bayonet drive motor is connected to the input shaft of the first reducer.

5. The tongue-and-mouth pre-piercing knife adjustment mechanism according to claim 1, characterized in that: Also includes The transmission side end cover is sleeved on the bayonet shaft and fixed to the transmission side wall plate on the side near the operating side wall plate. The transmission side end cover is provided with a transmission side annular protrusion, which is used to abut against the transmission side bearing that rotatably connects the bayonet shaft and the transmission side wall plate.

6. The tongue-and-mouth pre-stabbing adjustment mechanism according to claim 1, characterized in that: Also includes The operating side end cover is sleeved on the bayonet shaft and fixed to the side of the operating side wall plate near the transmission side wall plate. The operating side end cover is provided with an operating side annular protrusion, which is used to abut against the operating side bearing that rotatably connects the bayonet shaft and the operating side wall plate.

7. The tongue-and-mouth pre-stabbing adjustment mechanism according to claim 1, characterized in that: Also includes There are two guide rails, which are respectively installed on the transmission side wall plate and the operation side wall plate. The two guide rails are positioned correspondingly on the transmission side wall plate and the operation side wall plate. A slider is installed on each guide rail. The slider can slide horizontally on the guide rail. The two ends of the rubber roller are rotatably connected to the two sliders respectively. An adjusting screw is rotatably mounted on each of the opposing sides of the transmission side wall plate and the operating side wall plate. The adjusting screw passes through the adjusting plate fixed on the slider and is threadedly engaged with the adjusting plate. Rotating the adjusting screw drives the slider to slide on the guide rail.

8. The tongue-and-mouth pre-piercing knife adjustment mechanism according to claim 7, characterized in that: Also includes Adjustment block, the adjustment block is fixed on the slider; The copper sleeve is mounted on the adjusting block and can contact the guide rail to eliminate the gap between the slider and the guide rail.

9. The tongue-and-mouth pre-stabbing adjustment mechanism according to claim 1, characterized in that: Also includes Gear housing, the gear housing is fixed to the transmission side wall plate; The drive gear is rotatably connected to the gear seat by a gear shaft. The gear shaft passes through the transmission side wall plate and is connected to the servo motor. A first drive pulley coaxial with the drive gear is fixedly installed on the drive gear. Driven gear, the driven gear is set on one end of the conveyor roller located on the transmission side wall plate, and the driven gear meshes with the driving gear; The first driven pulley is located on one end of the rubber roller near the transmission side wall plate; A first conveyor belt connects a first driving pulley and a first driven pulley; A swing arm, one end of which is rotatably mounted on the transmission side wall plate; The tensioning wheel is mounted on the other end of the swing arm. The tensioning wheel presses down on the first conveyor belt to keep the first conveyor belt in a taut state.

10. The tongue-and-mouth pre-stabbing adjustment mechanism according to claim 9, characterized in that: Also includes The second motor mount is installed on the transmission side wall plate; The second reducer is mounted on the second motor base, and a second drive pulley is mounted on its output shaft. The output shaft of the servo motor is connected to the input shaft of the second reducer. The second driven pulley is mounted on the gear shaft; The second conveyor belt connects the second driving pulley and the second driven pulley.

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