A nozzle lift adjustment device

Abstract

The utility model discloses a kind of nozzle lifting adjustment devices, belong to printing machine technical field, including fixed frame, dynamic frame is slidably connected in fixed frame, the two sides of the bottom plate of multiple nozzles are respectively connected in the first side plate and the second side plate bottom end of dynamic frame;Fixed frame is enclosed by first, second side wall and bottom is open;Fixed frame top installs driving elevator, driven elevator;The output end of driving elevator is connected with the top of first side plate, and the output end of driven elevator is connected with the top of second side plate;The output end of driving elevator and driven elevator is all screw rod, the top of first side plate and second side plate is fixedly connected nut, screw rod and nut are all screw connection;The input shaft one end of driving elevator is connected with the input shaft of driven elevator by transmission shaft;Servo motor is installed on the outside of fixed frame, and the input shaft other end of driving elevator is connected with the output shaft of servo motor. Solve the technical problem that nozzle bottom plate and paper cannot keep parallel state on existing technology over roller.

Description

Technical Field

[0001] This utility model belongs to the field of printing press technology, specifically relating to a nozzle lifting and adjusting device. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] A digital inkjet printer is a high-tech digital printing device that uses inkjet printing without contact with the material to be printed. Inside the housing of a digital inkjet printer, a printhead device is usually mounted on top of multiple rollers on the same plane. The printhead device includes a printhead base plate, on which multiple printheads are mounted. The printheads print ink onto the material to be printed (such as inkjet paper) passing on the rollers.

[0004] As the width of the material to be printed increases and the printing speed improves, the number of printheads mounted on the printhead base plate gradually increases, leading to a gradual increase in the width and length of the printhead base plate. This necessitates increasing the number of guide rollers at the bottom of the printhead base plate. However, feeding paper onto multiple guide rollers on the same plane can cause uneven paper feeding. Furthermore, since inkjet paper comes in different types and specifications, and correspondingly, different thicknesses, it is necessary to adjust the gap between the printhead assembly and the material to be printed on the guide rollers (i.e., between the printhead base plate and the material to be printed on the guide rollers) during the printing process to accommodate materials of different thicknesses (such as inkjet paper) and achieve the best inkjet effect.

[0005] The prior art discloses a printhead base plate height adjustment mechanism for a digital printing machine. The printhead base plate is set inside two rear side plates, and a motor and lifting mechanism are set on the outer side of each rear side plate. The motor provides power to the lifting mechanism to raise or lower the printhead base plate.

[0006] While the above solutions can achieve the raising or lowering of the nozzle base plate, they still have the following drawbacks:

[0007] The above solution sets up an independent motor and lifting mechanism on both sides of the printhead base plate. When there are differences in the precision of the two lifting mechanisms or the two motors themselves, it is easy to cause the two sides of the printhead base plate to be raised or lowered at different heights, making it impossible for the printhead base plate to keep parallel with the paper feed on the roller, resulting in a decrease in printing quality. Utility Model Content

[0008] In view of this, the purpose of this utility model is to provide a nozzle lifting and adjusting device that can solve the technical problem in the prior art where an independent motor and lifting mechanism are set on both sides of the nozzle base plate, resulting in the nozzle base plate and the paper feed on the roller not being able to maintain a parallel state.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A nozzle lifting and adjusting device is provided, including a fixed frame installed above the frame, a movable frame slidably connected inside the fixed frame, and multiple nozzle base plates connected to the bottom ends of the first and second side plates of the movable frame respectively; the fixed frame is formed by the first side wall and the second side wall and has an opening at the bottom.

[0011] The first side plate and the second side plate extend into the fixed frame from the bottom surface of the fixed frame and are slidably connected to the first side wall.

[0012] An active lift and a driven lift are installed on the top of the fixed frame; the output end of the active lift is connected to the top of the first side plate, and the output end of the driven lift is connected to the top of the second side plate.

[0013] Both the active and passive lifting platforms have lead screws at their output ends. Nuts are fixedly connected to the top of the first and second side plates, and both the lead screws and nuts are threaded connections. One end of the input shaft of the active lifting platform is connected to the input shaft of the passive lifting platform via a transmission shaft. A servo motor is installed on the outside of the fixed frame, and the other end of the input shaft of the active lifting platform is connected to the output shaft of the servo motor.

[0014] Preferably, the bottom ends of the first side plate and the second side plate are arc-shaped, and when multiple nozzle base plates are connected to the bottom ends of the first side plate and the second side plate, the whole structure is arc-shaped; at the bottom of the multiple nozzle base plates, the lines connecting the shafts of the multiple rollers rotatably connected on the frame are the same arc shape.

[0015] Preferably, both the active lift and the driven lift are screw lifts; the input shaft and the drive shaft of the active lift are connected by a coupling, and the drive shaft and the input shaft of the driven lift are also connected by a coupling.

[0016] Preferably, both the first side plate and the second side plate are movable frame side plates. The top of the movable frame side plate is connected to a T-shaped plate. The T-shaped plate includes a horizontal plate and a vertical plate that is fixed vertically on the center line of the horizontal plate. The bottom surface of the horizontal plate is attached to the top of the movable frame side plate and connected to the movable frame side plate.

[0017] Preferably, a slide plate is connected to the side of the T-shaped plate away from the moving frame side plate. The slide plate is parallel to the moving frame side plate. A fixing plate is connected to the bottom end of the slide plate. A nut hole is opened on the fixing plate, and the nut is installed in the nut hole of the fixing plate. After the slide plate is connected to the T-shaped plate, a through hole is opened. The output end of the active or driven elevator passes through the through hole and is threadedly connected to the nut.

[0018] Preferably, two sliders are installed at both ends of the slide plate on the side facing away from the T-shaped plate, and two guide rails with corresponding positions are installed inside the first side wall, with the guide rails slidably connected inside the sliders.

[0019] Preferably, a cover plate is connected to the top of the fixed frame, the cover plate is located above the active lift and the driven lift, an avoidance groove is opened on the slide plate, the avoidance groove is located between the sliders, and the length of the avoidance groove is greater than the width of the cover plate; a stop groove is opened at the bottom center of the avoidance groove, and the bottom surface of the stop groove is flush with the top surface of the T-shaped plate.

[0020] Preferably, it also includes a position sensor installed at the bottom of the first side plate, and a position sensing plate installed on the frame, with the position sensing plate located directly below the position sensor.

[0021] Preferably, it also includes a PLC controller, with the position sensor connected to the PLC controller and the PLC controller connected to the servo motor.

[0022] Preferably, a limit sensor is installed on the top of the first side plate, and a limit rod is installed at the bottom inside the corresponding first side wall of the fixed frame. The limit rod is located above the limit sensor, and the limit sensor is connected to the PLC controller.

[0023] Compared with the prior art, the advantages and positive effects of this utility model are:

[0024] The printhead base plate of this invention has movable frame side plates connected to both ends. The movable frame side plates are slidably connected to the fixed frame, and the top of the movable frame side plates is connected to an active or driven lift installed inside the fixed frame. The input shaft of the active lift is connected to a servo motor, and the active and driven lifts are also connected by a transmission shaft. The servo motor drives the active and driven lifts to rotate synchronously, so that the two ends of the printhead base plate keep rising and falling synchronously, ensuring that the printhead base plate and the paper feed roller always remain parallel, improving printing quality. Furthermore, using only one servo motor also reduces production costs. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0026] Figure 1 This is a three-dimensional view of the left side of the nozzle lifting and adjusting device according to an embodiment of this utility model;

[0027] Figure 2 This is a three-dimensional view of the nozzle lifting and adjusting device according to an embodiment of the present invention;

[0028] Figure 3 This is a top-side three-dimensional view of the nozzle lifting and adjusting device according to an embodiment of the present invention;

[0029] Figure 4 This is an internal three-dimensional view of the nozzle lifting and adjusting device according to an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional view of the nozzle lifting and adjusting device according to an embodiment of the present utility model;

[0031] Figure 6 This is an enlarged view of the sliding connection between the first side plate and the first side wall in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram showing the positions of the clearance groove and the cover plate in an embodiment of this utility model;

[0033] Figure 8 This is a schematic diagram of the installation position of the limiting rod according to an embodiment of the present utility model;

[0034] Figure 9 This is a schematic diagram showing the positions of the limit sensor and the limit rod in an embodiment of this utility model;

[0035] Figure 10 This is a schematic diagram showing the positions of the nozzle lifting and adjusting device and the roller in an embodiment of this utility model;

[0036] Figure 11 This is a schematic diagram showing the positions of the position sensor and the position sensing plate in an embodiment of this utility model;

[0037] In the picture:

[0038] 1. Nozzle base plate; 2. First side plate; 21. T-shaped plate; 22. Slide plate; 23. Fixing plate; 24. Through hole; 25. Slider; 26. Guide rail; 27. Limit rod; 271. Limit sensor; 28. Clearance groove; 29. ​​Stop groove; 3. Second side plate; 4. Fixed frame; 41. First side wall; 42. Second side wall; 43. Cover plate; 5. Active lifting platform; 6. Driven lifting platform; 7. Servo motor; 8. Drive shaft; 9. Coupling; 10. Frame; 101. Overhead roller; 102. Position sensing plate; 103. Position sensor. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] Definitions:

[0041] Screw jacks consist of components such as worm gears, housings, bearings, and lead screws. The worm gear is driven to rotate by a motor or manually, which in turn drives the worm wheel to rotate at a reduced speed. The worm wheel has an internal thread, which drives the lead screw to move up and down. Due to the internal worm gears and the deceleration effect of the lead screw, the thrust is amplified.

[0042] The present invention will now be described in detail with reference to the accompanying drawings.

[0043] This embodiment discloses a nozzle lifting and adjusting device, such as Figure 1 , Figure 2 , Figure 9 As shown, the system includes a fixed frame 4, within which a movable frame is slidably connected. Multiple nozzle base plates 1 are mounted on the bottom of the movable frame. Specifically, the two sides of each nozzle base plate 1 are connected to the bottom ends of a first side plate 2 and a second side plate 3 of the movable frame, respectively. The first side plate 2 and the second side plate 3 are slidably connected to the fixed frame 4. Figure 9 As shown, the printhead lifting and adjusting device is installed above the frame 10 of the digital inkjet printer. The top of the fixed frame 4 is connected to the top cantilever of the frame 10. When the first side plate 2 and the second side plate 3 move up and down relative to the fixed frame 4, they can drive the printhead base plate 1 to move up and down relative to the fixed frame 4.

[0044] like Figure 3 As shown, the fixed frame 4 and the moving frame are hollow rectangular frames. The fixed frame 4 is composed of two parallel first sidewalls 41 and two parallel second sidewalls 42. The bottom surface of the fixed frame 4 is open. The first side plate 2 and the second side plate 3 of the moving frame extend from the bottom surface of the fixed frame 4 into the interior of the fixed frame 4 and are slidably connected to the first sidewall 41 of the fixed frame.

[0045] like Figures 1 to 4 As shown, an active lift 5 is installed on the top of the first side wall 41, which is slidably connected to the first side plate 2, and a driven lift 6 is installed on the top of the first side wall 41, which is slidably connected to the second side plate 3; wherein, the output end of the active lift 5 is connected to the top of the first side plate 2, and the output end of the driven lift 6 is connected to the top of the second side plate 3.

[0046] Specifically, the output ends of the active lifting machine 5 and the driven lifting machine 6 are both lead screws. Nuts are fixedly connected to the top of the first side plate 2 and the second side plate 3. The lead screw and the nut are both threaded connections (a threaded hole matching the lead screw is opened in the center of the nut). When the output ends of the active lifting machine 5 and the driven lifting machine 6 rotate, the lead screw and the nut rotate relative to each other. Since the active lifting machine 5 and the driven lifting machine 6 are installed on the fixed frame 4, the first side plate 2 and the second side plate 3 drive the nozzle base plate 1 to move up and down relative to the fixed frame 4.

[0047] In this embodiment, as Figure 1 As shown, a servo motor 7 is installed on the outer side of the side wall of the active lift 5 mounted on the fixed frame 4. One end of the input shaft of the active lift 5 is connected to the output shaft of the servo motor 7, and the other end is connected to the input shaft of the driven lift 6 via a transmission shaft 8. It can be understood that when the servo motor 7 starts, the output shaft of the servo motor 7 rotates, driving the input shaft of the active lift 5 to rotate, and simultaneously driving the input shaft of the driven lift 6 to rotate.

[0048] It should be noted that when the input shafts of the active lift 5 and the driven lift 6 rotate one revolution, the output ends of the active lift 5 and the driven lift 6 rotate the same number of revolutions. The input shaft of the active lift 5 can transmit the rotation frequency of the servo motor 7 to the driven lift 6, ensuring that the lifting speed and height of the first side plate 2 and the second side plate 3 are consistent, thereby ensuring that the nozzle base plate 1 remains consistent on both sides when it is lifted or lowered.

[0049] In this embodiment, by installing a transmission shaft 8 between the active lifting mechanism 5 and the driven lifting mechanism 6, a single servo motor 7 can drive the active lifting mechanism 5 and the driven lifting mechanism 6 to rotate synchronously. This ensures that the printhead base plate 1 remains consistent on both sides when it is raised or lowered. This solves the technical problem in the prior art where each side of the printhead base plate is equipped with an independent motor and lifting mechanism. When the output speeds of the two motors are different, the height of the printhead base plate raised or lowered on both sides will be different, causing the printhead base plate to be unable to maintain a parallel state with the paper feed on the roller, resulting in a decrease in printing quality. Furthermore, this embodiment uses only one servo motor, which also reduces costs accordingly.

[0050] In this embodiment, as Figure 1 , Figure 4 , Figure 9 As shown, multiple nozzle base plates 1 are connected between the first side plate 2 and the second side plate 3. The bottom ends of the first side plate 2 and the second side plate 3 are arc-shaped. When the multiple nozzle base plates 1 are connected to the bottom ends of the first side plate 2 and the second side plate 3, the whole structure presents an arc shape. In this embodiment, as... Figure 9 As shown, at the bottom of multiple printhead base plates 1, the connecting lines between the axes of multiple rollers 101 rotatably connected on the frame 10 are the same arc shape. That is, the center of the arc connecting the axes of multiple rollers is the same as the center of the arc edge of the printhead base plate 1, so that when the paper is fed on the rollers, the paper and the printhead base plate 1 remain parallel.

[0051] In this embodiment, the multiple rollers are changed from being on the same plane to having their axes connected in an arc shape. This ensures that when the paper or other printing material passes through the multiple rollers in sequence, each roller has a wrap angle with the paper (in traditional cases, rollers are installed on the same horizontal plane, and only the rollers at both ends have wrap angles with the paper). This keeps the paper or other printing material taut and ensures smooth paper feeding.

[0052] In this embodiment, both the active lifting platform 5 and the driven lifting platform 6 employ existing screw jack technology, consisting of components such as a worm gear, housing, bearings, and lead screw. The worm gear is driven to rotate by a motor or manually, which in turn drives the worm wheel to rotate at a reduced speed. The worm wheel's inner cavity is machined with an internal thread, driving the lead screw to move up and down. Due to the internal worm gear, the reduction effect of the lead screw amplifies the thrust. For example, the "Nut Movement SJA-R" type screw jack produced by Limtech (Langfang) Transmission Equipment Co., Ltd. It should be noted that the input shaft of either the active lifting platform 5 or the driven lifting platform 6 is the worm gear.

[0053] In this embodiment, as Figure 1 , Figure 4 As shown, the input shaft of the active lift 5 is connected to the transmission shaft 8 via a coupling 9, and the transmission shaft 8 is also connected to the input shaft of the driven lift 6 via a coupling 9. Since one end of the input shaft of the active lift 5 is connected to the output shaft of the servo motor 7 and the other end is connected to the input shaft of the driven lift 6, the rotation of the servo motor 7 can be synchronously transmitted to the driven lift 6.

[0054] like Figure 4 , Figure 5 As shown, the output end of the active lifting platform 5 is connected to the top of the first side plate 2, and the output end of the driven lifting platform 6 is connected to the top of the second side plate 3. Specifically, the first side plate 2 and the second side plate 3 are the same size and shape, and are both moving frame side plates. Taking the first side plate 2 as an example, the top of the first side plate 2 is fixedly connected to a T-shaped plate 21. The T-shaped plate 21 includes a horizontal plate and a vertical plate. The vertical plate is fixed vertically on the center line of the horizontal plate. The bottom surface of the horizontal plate of the T-shaped plate 21 is attached to the top of the first side plate 2. The T-shaped plate 21 and the first side plate 2 are connected by bolts.

[0055] like Figures 5 to 7 As shown, the side of the T-shaped plate 21 furthest from the first side plate 2 is connected to a sliding plate 22. The sliding plate 22 is parallel to the first side plate 2, and the bottom end of the sliding plate 22 is connected to a fixing plate 23 (the fixing plate 23 is perpendicular to the sliding plate 22). Nut holes are provided on the fixing plate 23, and nuts are installed on the fixing plate 23 using bolts. After the sliding plate 22 is connected to the T-shaped plate 21, a through hole 24 is provided. The output end of the active lifting mechanism 5 passes through the through hole 24 and is threadedly connected to the nut. It can be understood that the diameter of the through hole 24 is larger than the diameter of the output end of the active lifting mechanism 5.

[0056] In this embodiment, when the output end of the active lift 5 rotates, the nut moves up and down relative to the output end of the active lift 5, thereby causing the fixed plate 23, the sliding plate 22, the T-shaped plate 21, and the first side plate 2 to move up and down relative to the active lift 5. Similarly, when the output end of the driven lift 6 rotates, the nut moves up and down relative to the output end of the driven lift 6, thereby causing the fixed plate 23, the sliding plate 22, the T-shaped plate 21, and the second side plate 3 to move up and down relative to the driven lift 6.

[0057] like Figures 5 to 7 As shown, two sliders 25 are installed at both ends of the slide plate 22 facing away from the T-shaped plate 21. Two guide rails 26 with corresponding positions are installed inside the side wall of the fixed frame 4 where the active lift 5 or the driven lift 6 is installed. The sliders 25 and the guide rails 26 are matched and used. The relative sliding of the sliders 25 and the guide rails 26 is achieved by the relative sliding of the first side plate 2 or the second side plate 3 relative to the fixed frame 4.

[0058] like Figures 4 to 8 As shown, the top of the fixed frame 4 is connected to the cover plate 43, which is located above the active lift 5 and the driven lift 6. A clearance groove 28 is opened on the slide plate 22, which is located between the sliders 25. The length of the clearance groove 28 is greater than the width of the cover plate. When the slide plate 22 is lifted by the active lift 5 or the driven lift 6, the slide plate 22 moves upward relative to the cover plate 43 on both sides of the clearance groove 28. A stop groove 29 is also opened at the bottom center of the clearance groove 28. The bottom surface of the stop groove 29 is flush with the top surface of the T-shaped plate 21. The size of the stop groove 29 matches the bottom size of the active lift 5 or the driven lift 6 to avoid hindering the upward movement of the moving frame.

[0059] like Figure 10 As shown, in this embodiment, a position sensor 103 is also included, installed at the bottom of the first side plate 2. The probe of the position sensor 103 is positioned downwards, as shown in the figure. Figure 11 As shown, a position sensing plate 102 corresponding to the position sensor 103 is installed on the frame 10 directly below the position sensor 103. The position sensor 103 (which can be a laser rangefinder) is used to detect the corresponding distance to the position sensing plate 102. A PLC controller is also included. The position sensor 103 is connected to the PLC controller via a wire. The PLC controller is connected to the servo motor 7 via a wire (a relay is installed on the wire between the PLC controller and the servo motor 7) to control the servo motor 7 to rotate forward / reverse or stop. The position sensor 103 transmits the real-time detected height information to the PLC controller.

[0060] In this embodiment, the PLC controller can be connected to a human-machine interface (HMI). According to printing requirements (such as changes in the thickness of the paper to be printed), the set height value is input to the PLC controller through the HMI. When the height information detected by the position sensor 103 is different from the input set height value, the PLC controller controls the servo motor 7 to adjust the position of the frame by forward / reverse rotation. When the height information detected by the position sensor 103 is the same as the input set height value, the PLC controller controls the servo motor 7 to stop.

[0061] like Figure 8 , Figure 9 As shown, two limit sensors 271 are installed on the top of the first side plate 2, and a limit rod 27 is installed at the bottom inside the corresponding first side wall 41 of the fixed frame 4. The limit rod is located above the limit sensors, and the limit sensors 271 are used to detect the distance to the limit rod 27. The limit sensors 271 are connected to the PLC controller via wires, transmitting the detected distance to the limit rod 27 to the PLC controller. The PLC controller sets threshold values ​​for the two limit sensors 271, one as the highest limit threshold and the other as the lowest limit threshold. When the PLC controller receives the detected distance to the limit rod 27 reaching the highest or lowest limit threshold, it controls the servo motor 7 to stop rotating to prevent the moving frame from pressing down on the roller or pressing up on the active lift 5 or the driven lift 6.

[0062] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A nozzle lifting and adjusting device, characterized in that, It includes a fixed frame installed above the machine frame, a movable frame slidably connected inside the fixed frame, and multiple nozzle base plates connected to the bottom ends of the first and second side plates of the movable frame on both sides respectively; the fixed frame is formed by the first side wall and the second side wall and has an opening at the bottom. The first side plate and the second side plate extend into the fixed frame from the bottom surface of the fixed frame and are slidably connected to the first side wall. An active lift and a driven lift are installed on the top of the fixed frame; the output end of the active lift is connected to the top of the first side plate, and the output end of the driven lift is connected to the top of the second side plate. The output ends of both the active and passive lifting machines are lead screws, and nuts are fixedly connected to the top of the first and second side plates. Both the lead screws and nuts are threaded connections. One end of the input shaft of the active lifting machine is connected to the input shaft of the passive lifting machine through a transmission shaft. A servo motor is installed on the outside of the fixed frame, and the other end of the input shaft of the active lifting machine is connected to the output shaft of the servo motor.

2. The nozzle lifting and adjusting device as described in claim 1, characterized in that, The bottom ends of the first side plate and the second side plate are arc-shaped. When multiple nozzle base plates are connected to the bottom ends of the first side plate and the second side plate, the whole structure is arc-shaped. At the bottom of the multiple nozzle base plates, the lines connecting the shafts of multiple rollers rotatably connected on the frame are the same arc shape.

3. The nozzle lifting and adjusting device as described in claim 1, characterized in that, Both the active and passive elevators are screw elevators; the input shaft and drive shaft of the active elevator are connected by a coupling, and the drive shaft and input shaft of the passive elevator are also connected by a coupling.

4. The nozzle lifting and adjusting device as described in claim 1, characterized in that, Both the first side plate and the second side plate are moving frame side plates. The top of the moving frame side plate is connected to a T-shaped plate. The T-shaped plate includes a horizontal plate and a vertical plate that is fixed vertically on the center line of the horizontal plate. The bottom surface of the horizontal plate is attached to the top of the moving frame side plate and connected to the moving frame side plate.

5. The nozzle lifting and adjusting device as described in claim 4, characterized in that, The T-shaped plate is connected to a slide plate on the side away from the moving frame side plate. The slide plate is parallel to the moving frame side plate. The bottom end of the slide plate is connected to a fixed plate. A nut hole is opened on the fixed plate, and the nut is installed in the nut hole of the fixed plate. After the slide plate is connected to the T-shaped plate, a through hole is opened. The first output end of the active or driven elevator passes through the through hole and is threadedly connected to the nut.

6. The nozzle lifting and adjusting device as described in claim 5, characterized in that, Two sliders are installed at both ends of the slide plate on the side facing away from the T-shaped plate, and two guide rails with corresponding positions are installed inside the first side wall. The guide rails are slidably connected inside the sliders.

7. The nozzle lifting and adjusting device as described in claim 6, characterized in that, The top of the fixed frame is connected to a cover plate, which is located above the active and passive elevators. An avoidance groove is opened on the slide plate, which is located between the sliders. The length of the avoidance groove is greater than the width of the cover plate. A stop groove is opened at the bottom center of the avoidance groove, and the bottom surface of the stop groove is flush with the top surface of the T-shaped plate.

8. The nozzle lifting and adjusting device as described in claim 1, characterized in that, It also includes a position sensor installed at the bottom of the first side plate, and a position sensing plate installed on the frame, with the position sensing plate located directly below the position sensor.

9. A nozzle lifting and adjusting device as described in claim 8, characterized in that, It also includes a PLC controller, the position sensor is connected to the PLC controller, and the PLC controller is connected to the servo motor.

10. A nozzle lifting and adjusting device as described in claim 9, characterized in that, A limit sensor is installed on the top of the first side plate, and a limit rod is installed at the bottom of the corresponding inner side wall of the fixed frame. The limit rod is located above the limit sensor, and the limit sensor is connected to the PLC controller.

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