An inkjet printing large size vacuum chamber uncovering system

Abstract

The present application relates to the technical field of vacuum cavity equipment, and discloses a large-size vacuum cavity uncovering system for inkjet printing, which comprises a rack, a vacuum cavity, a sealing cover, a lifting mechanism, an anti-falling mechanism and a pressing mechanism. The vacuum cavity, the lifting mechanism and the anti-falling mechanism are all arranged on the rack, the sealing cover is used for sealing the vacuum cavity, the lifting mechanism is connected with the sealing cover to realize the lifting of the sealing cover, and the anti-falling mechanism supports the sealing cover after the sealing cover is lifted to a target position. The pressing mechanism is arranged on the vacuum cavity or the rack and is used for pressing the sealing cover on the vacuum cavity or releasing the sealing cover from the vacuum cavity. Through the cooperative operation of the mechanisms, the system improves the installation and fixing stability and the sealing reliability of the sealing cover, realizes the automatic operation of the opening and closing and pressing of the sealing cover, simplifies the operation process, and improves the use convenience and operation safety.

Description

Technical Field

[0001] This invention relates to the field of vacuum chamber equipment technology, and in particular to a large-size vacuum chamber opening system printed with inkjet ink. Background Technology

[0002] Vacuum drying equipment is an important component of the substrate drying and film formation system after OLED inkjet printing. It ensures that the ink solvent evaporates and the solute forms a uniform film, and is an essential part of the complete OLED inkjet printing equipment.

[0003] As market demand for large-size OLED displays increases, the chamber size of vacuum drying equipment is becoming larger, and consequently, the sealing cover of the vacuum chamber is also becoming larger and heavier. During maintenance of the vacuum equipment, the sealing cover needs to be smoothly raised 800mm-1000mm and held in place to facilitate inspection of the chamber's interior. After maintenance, the sealing cover needs to be lowered to ensure a tight fit with the vacuum chamber. The current method involves bolting the sealing cover to the chamber's edge. Due to the large size of the sealing cover, dozens of bolts are required to secure it to the chamber, resulting in a significant workload and cumbersome process. Summary of the Invention

[0004] The present invention aims to improve at least one technical problem in the prior art.

[0005] This invention provides a large-size vacuum chamber opening system for inkjet printing, comprising:

[0006] frame;

[0007] A vacuum chamber is mounted on the frame.

[0008] A sealing cap is used to seal the vacuum cavity;

[0009] A lifting mechanism, mounted on the frame, is used to lift and lower the sealing cover;

[0010] A fall protection mechanism is installed on the frame to support the sealing cover after it is raised to the target position.

[0011] A clamping mechanism, disposed on the vacuum chamber or frame, is used to press the sealing cap onto or release it from the vacuum chamber.

[0012] The beneficial effects of this invention are as follows: This inkjet printing large-size vacuum chamber opening system provides a stable mounting base for each component through the frame. The vacuum chamber and the sealing cover work together to achieve the sealing function. The lifting mechanism realizes the lifting and lowering operation of the sealing cover. The anti-fall mechanism provides effective support after the sealing cover is lifted to the target position. The clamping mechanism is specifically responsible for the clamping and loosening action between the sealing cover and the vacuum chamber. The synergistic action of each component makes the installation and fixation of the sealing cover more stable, effectively improving its sealing reliability. At the same time, the automated lifting, supporting and clamping operations greatly simplify the operation process of opening, closing and clamping the sealing cover, improving the convenience and automation of operation.

[0013] As some sub-solutions of the above technical solution, the lifting mechanism includes:

[0014] The first drive is mounted on the rack.

[0015] The transmission component is driven by the first driver;

[0016] A lifting rod is connected to the first driver via a transmission assembly, and the first driver drives the lifting rod to move up and down via the transmission assembly.

[0017] A sealing cap connecting block is connected to the sealing cap. The top side of the sealing cap connecting block is provided with a through hole, and the middle part of the sealing cap connecting block is provided with an accommodating space. The through hole communicates with the accommodating space.

[0018] A connecting flange is provided, and the lifting rod passes through the through hole and connects to the connecting flange. The outer diameter of the connecting flange is larger than the inner diameter of the through hole, so that the connecting flange can move upward with the lifting rod to lift the sealing cover.

[0019] The connecting flange can move along the axial direction of the through hole within the accommodating space.

[0020] The lifting mechanism is powered by a first driver, which transmits the power to the lifting rod via a transmission assembly. Utilizing the through-hole and accommodating space structure of the sealing cover connecting block, the connection flange and lifting rod are matched to both stably lift the sealing cover and allow the connecting flange to move along the through-hole axis within the accommodating space. This structural design allows the sealing cover to better fit the sealing surface of the vacuum chamber during the descent sealing process, reducing stress concentration caused by rigid contact and further improving the sealing performance and reliability of the fit between the sealing cover and the vacuum chamber. Simultaneously, stable power transmission ensures smooth opening and closing.

[0021] As a sub-solution of the above technical solution, the lifting mechanism further includes a guide component, which includes:

[0022] A guide rod, one end of which is connected to the frame and the other end of which is connected to the vacuum chamber;

[0023] A linear bearing is connected to the sealing cover, and the sealing cover is movably fitted onto the guide rod via the linear bearing.

[0024] The guide rod and linear bearing in the guide assembly provide precise guidance for the lifting and lowering movement of the sealing cover. The sealing cover is movably mounted on the guide rod via the linear bearing, effectively limiting the offset of the sealing cover during lifting and lowering. This ensures that the sealing cover always moves along the preset trajectory, making the alignment of the sealing cover with the vacuum chamber more precise, avoiding sealing problems caused by offset, improving the reliability of the opening, closing and sealing of the sealing cover, and also making the lifting and lowering action smoother.

[0025] As a sub-solution of the above technical solution, the lifting mechanism also includes a position detection component, which is used to detect the position of the sealing cover. By setting the position detection component, the timely support of the fall arrest mechanism and the precise action of the clamping mechanism are provided with positional basis, ensuring the coordination of the actions of each mechanism and further improving the reliability and automation accuracy of the entire system operation.

[0026] As some sub-solutions of the above technical solution, the fall protection mechanism includes:

[0027] Second linear driver;

[0028] The pin is driven by the second linear actuator;

[0029] A column base, wherein the column base is provided with a fall-prevention hole for inserting the pin;

[0030] The second linear actuator drives the pin to move in and out of the anti-fall hole.

[0031] In the fall arrest mechanism, the second linear actuator drives the pin to move in and out of the fall arrest hole in the pin seat, thus supporting and releasing the sealing cover. When the sealing cover is raised to the target position, the pin inserts into the fall arrest hole to form a stable support, effectively reducing the risk of the sealing cover falling accidentally. This provides reliable safety for the sealing cover in the raised state, improving the operational safety of the entire system and the reliability of the sealing cover.

[0032] As a sub-solution of the above technical solution, the second linear actuator is equipped with a position sensor for detecting the extension and retraction positions of the pin. The position sensor on this second linear actuator can accurately detect the extension and retraction positions of the pin. Through the position signal fed back by the magnetic switch, it can confirm in real time whether the pin is fully inserted into the anti-fall hole to form reliable support, or whether it is fully retracted to avoid affecting the lifting and lowering of the sealing cover. This avoids the problem of anti-fall protection failure or interference with the movement of the sealing cover due to uncertain pin position, providing accurate basis for the action control of the anti-fall mechanism, improving the reliability of the anti-fall mechanism's operation, and further improving the system's automated control logic.

[0033] As a sub-solution of the above technical solution, the clamping mechanism includes:

[0034] A rotary drive assembly, which is mounted on the frame;

[0035] The rotating shaft is driven to rotate by the rotation drive assembly;

[0036] Linkage mechanism, which is connected to the rotating shaft for transmission;

[0037] A pressure head is located at the end of the linkage mechanism;

[0038] The rotary drive assembly can drive the linkage mechanism to move to the dead center position, so that the pressure head presses against the sealing cover; the rotary drive assembly can also drive the linkage mechanism to move away from the dead center position, so that the pressure head releases the sealing cover.

[0039] In this clamping mechanism, the rotary drive assembly drives the rotating shaft to rotate, which in turn drives the linkage mechanism to move, thereby driving the pressure head to clamp and release the sealing cover. When the rotary drive assembly drives the linkage mechanism to the dead center position, the pressure head can form a stable clamping force on the sealing cover. The structural characteristics of the dead center position make the clamping state less susceptible to change due to external interference, thus improving the sealing reliability. When the linkage mechanism moves away from the dead center position, the pressure head can quickly release the sealing cover, making operation convenient. This structure achieves efficient conversion between clamping and releasing actions, meeting the requirements of automated opening and closing.

[0040] As a sub-solution of the above technical solution, the linkage mechanism includes: a fixed block, an intermediate rod, a drive rod, and a clamping rod. The fixed block is mounted on the frame. The rotating shaft is drivenly connected to the drive rod. The drive rod, intermediate rod, and clamping rod are sequentially hinged, and the clamping rod is hinged to the fixed block at another position. The pressure head is mounted on the clamping rod, facing the sealing cover. This linkage mechanism is fixed to the frame by the fixed block, the rotating shaft is drivenly connected to the drive rod, the drive rod, intermediate rod, and clamping rod are sequentially hinged, and the clamping rod is simultaneously hinged to the fixed block. The pressure head is located on the side of the clamping rod facing the sealing cover. This multi-bar hinged structure allows the torque of the rotary drive assembly to be smoothly transmitted to the pressure head. By changing the direction and magnitude of the force transmission through the coordinated movement of each rod, the clamping force of the pressure head on the sealing cover is more evenly distributed, improving the clamping effect and sealing reliability. Furthermore, the structure is compact and easy to install on the frame.

[0041] As a sub-solution of the above technical solution, the rotary drive assembly includes a first hinge support, a third linear actuator, and a rotating handle. The first hinge support is mounted on the frame. The fixed end and driving end of the third linear actuator are respectively hinged to the rotating handle and the first hinge support. The rotating handle is connected to the rotating shaft for transmission. The first hinge support provides a stable reference. The rotating handle and the first hinge support are respectively hinged at both ends of the third linear actuator. The double-hinged design can eliminate lateral forces and installation errors, reduce rigid impacts, reduce wear, and extend service life.

[0042] As a sub-solution of the above technical solution, the pressure head is connected to the clamping rod through an adjustment structure. The adjustment structure includes a threaded hole and a stud, one of which is located on the pressure head, and the other is located on the clamping rod. The stud is threadedly connected to the threaded hole. This pressure head is connected to the clamping rod through the adjustment structure consisting of a threaded hole and a stud. Rotating the pressure head allows adjustment of the extension length of the pressure head relative to the clamping rod through the threaded engagement of the stud and the threaded hole. This design allows for fine-tuning of the pressure head position according to the actual installation of the sealing cover and sealing requirements, ensuring that multiple pressure heads can simultaneously adhere to the sealing cover and apply uniform clamping force, adapting to sealing requirements under different working conditions, and improving the versatility and sealing reliability of the clamping mechanism. Attached Figure Description

[0043] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 This is a schematic diagram of the structure of a large-size vacuum chamber opening system for inkjet printing according to the present invention;

[0045] Figure 2 A structural diagram of the lifting mechanism;

[0046] Figure 3 A schematic diagram of the fall protection mechanism;

[0047] Figure 4 This is a schematic diagram of the clamping mechanism in the clamping state;

[0048] Figure 5 This is a partial structural diagram of the clamping mechanism when it is in the clamping state.

[0049] Figure 6 This is a schematic diagram of the clamping mechanism in the released state.

[0050] In the attached image:

[0051] 1-Rack;

[0052] 2-Vacuum cavity;

[0053] 3-Sealing cap;

[0054] 4-Lifting mechanism; 401-Lifting rod; 402-First driver; 403-Commutator; 405-Cover connecting block; 406-Guide rod; 407-Linear bearing; 408-Photoelectric switch indicator; 409-Photoelectric switch assembly;

[0055] 5-Fall protection mechanism; 501-Second linear actuator; 503-Pin; 504-Pin base;

[0056] 6-Pressure clamping mechanism;

[0057] 601-First hinge support; 602-Third linear actuator; 604-Rotating handle; 605-Reinforcing connecting plate; 606-Pressure head; 607-Rotating shaft; 608-Linkage mechanism;

[0058] 6081 - Fixing block; 6083 - Clamping rod; 6084 - Intermediate rod; 6085 - Drive rod. Detailed Implementation

[0059] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0060] The following is combined with Figures 1 to 6 Embodiments of the present invention will be described.

[0061] The sealing caps 3 of large-size vacuum chambers 2 used in inkjet printing are mostly opened, closed and tightened manually or by simple mechanical structures. This is not only laborious and inefficient, making it difficult to adapt to automated production processes, but also results in uneven pressure control during the tightening process. The sealing caps 3 and vacuum chambers 2 have poor fit accuracy, insufficient sealing reliability, and are prone to vacuum leakage, which affects print quality.

[0062] This embodiment provides a large-size vacuum chamber opening system for inkjet printing, such as... Figure 1 As shown, the device includes a frame 1, on which a vacuum chamber 2 is fixedly mounted. A sealing cover 3 for sealing its opening is disposed above the vacuum chamber 2. A lifting mechanism 4 for raising and lowering the sealing cover 3 is installed on the top of the frame 1. Anti-fall mechanisms 5 for supporting the sealing cover 3 after it is raised to the target position are provided on both sides of the frame 1 near the vacuum chamber 2. A clamping mechanism 6 for pressing the sealing cover 3 onto or releasing it from the vacuum chamber 2 is provided on the outer periphery of the vacuum chamber 2 corresponding to the edge of the sealing cover 3.

[0063] The lifting mechanism 4 enables the automatic lifting and lowering of the sealing cover 3, replacing manual operation and improving opening and closing efficiency; the anti-fall mechanism 5 forms mechanical support after the sealing cover 3 is lifted, avoiding the risk of falling due to the failure of the lifting mechanism 4; the pressing mechanism 6 provides stable and uniform pressing force, which, together with the rubber sealing gasket on the sealing cover 3, improves the sealing reliability. The coordinated work of each mechanism makes the opening, closing and pressing process of the sealing cover 3 suitable for automated production, while ensuring the sealing effect.

[0064] In existing lifting mechanisms, the lifting of the sealing cover 3 is mostly a rigid connection. When the vacuum chamber 2 is subjected to negative pressure and deforms, stress is easily generated on the lifting rod 401, reducing its service life. Further, in one embodiment of the present invention, the lifting mechanism 4 includes a first driver 402. The first driver 402 is a servo motor and is fixed to the top of the frame 1 via a motor mount. The output end of the first driver 402 is connected to a transmission assembly. In this embodiment, the transmission assembly includes a first bevel gear, a second bevel gear, a rotating rod, a coupling, a commutator 403, and a worm gear lifter. The lifting rod 401 is the output end of the worm gear lifter. There are four worm gear lifters in total, two on each side of the first driver 402. The four worm gear lifters are rectangularly distributed and symmetrically arranged about the sealing cover 3. On one side, the output shaft of the first driver 402, the first bevel gear, the second bevel gear, the rotating rod, the coupling, and the commutator 403 are sequentially connected in a transmission manner. The commutator 403 includes two rotating rods that output power. The two rotating rods are respectively connected to two worm gear elevators to drive the lifting rod 401 to move up and down. A cover connecting block 405 is arranged below the lifting rod 401. The cover connecting block 405 is fixedly connected to the upper surface of the sealing cover 3 by bolts. A through hole is opened on the top side of the cover connecting block 405 in the vertical direction, and an accommodating space is opened in the middle of the cover connecting block 405 in the horizontal direction. The through hole and the accommodating space communicate to form a T-shaped hole structure. The lower end of the lifting rod 401 passes through the through hole and is fixedly connected to the connecting flange by threads. The outer diameter of the connecting flange is larger than the inner diameter of the through hole, so that the connecting flange can abut against the top wall of the accommodating space and lift the sealing cover 3 when the lifting rod 401 moves upward. The connecting flange can move along the axis of the through hole within the accommodating space.

[0065] After the first driver 402 starts, it drives the lifting rod 401 of the worm gear hoist to move up and down synchronously through the first bevel gear, the second bevel gear, the rotating rod, and the commutator 403. When the lifting rod 401 moves up, the connecting flange moves up within the accommodating space and abuts against the top wall of the accommodating space, thereby driving the sealing cover connecting block 405 and the sealing cover 3 to rise. When it descends, the sealing cover 3 first contacts the vacuum chamber 2, and the lifting rod 401 continues to move down, causing the connecting flange to move downward within the accommodating space until it is no longer in contact with the inner wall of the accommodating space (including any inner wall that surrounds the accommodating space). Thus, when the vacuum chamber 2 is subjected to negative pressure and deforms, the deformation of the vacuum chamber 2 will not cause stress to the connecting flange through the inner wall of the accommodating space, avoiding a reduction in the service life of the lifting rod 401 due to stress on the lifting rod 401.

[0066] Furthermore, the present invention also includes a guide assembly comprising guide rods 406 and linear bearings 407. Four guide rods 406 are arranged and located at the four corners of the vacuum chamber 2. The upper end of each guide rod 406 is fixedly connected to the frame 1 via a flange, and the lower end is fixedly connected to the upper surface of the vacuum chamber 2. The axis of the guide rods 406 is parallel to the axis of the lifting rods 401. The linear bearings 407 are fixedly connected to the lower edge of the sealing cover 3 via a mounting base. The inner diameter of the linear bearings 407 is adapted to the outer diameter of the guide rods 406. The sealing cover 3 is movably fitted onto the guide rods 406 via the linear bearings 407. When the sealing cover 3 rises and falls with the lifting mechanism 4, the linear bearings 407 slide along the axial direction of the guide rods 406. The guide rods 406 rigidly constrain the movement trajectory of the sealing cover 3, limiting its radial offset. The symmetrical arrangement of the four guide rods 406 makes the force on the sealing cover 3 more uniform. The guide rod 406 and the linear bearing 407 work together to ensure that the sealing cover 3 always moves up and down along the preset trajectory, thereby improving its alignment accuracy with the sealing surface of the vacuum chamber 2 and reducing the risk of collision.

[0067] Furthermore, the present invention also includes a position detection component, which includes a photoelectric switch indicator 408 and a photoelectric switch assembly 409. The photoelectric switch indicator 408 is fixed to a mounting base on the side of the sealing cover 3 by bolts, and its horizontal section extends toward the frame 1. The photoelectric switch assembly 409 includes multiple photoelectric sensors, which are fixed to the frame 1 by brackets and are respectively set to the initial position of the sealing cover 3 (in contact with the vacuum chamber 2), the target lifting position, and the intermediate positioning position during the lifting process. The sensing end of the photoelectric sensor faces the photoelectric switch indicator 408, and its signal output end is connected to the system controller through a wire. The system controller is electrically connected to the first driver 402.

[0068] When the sealing cover 3 is raised or lowered, it drives the photoelectric switch indicator 408 to move synchronously. When the indicator moves to the sensing area of ​​a photoelectric sensor, the photoelectric sensor sends a position signal to the system controller. The system controller then controls the start / stop or speed adjustment of the first driver 402 according to a preset program. When the sealing cover 3 reaches the target lifting position, the photoelectric sensor at the corresponding position sends a feedback signal, and the system controller controls the first driver 402 to stop, simultaneously triggering the anti-fall mechanism 5. By detecting the position of the sealing cover 3 in real time and forming a closed-loop control, the accuracy of the lifting mechanism 4 is improved, and over-raising or lowering is avoided.

[0069] Four fall arrest mechanisms 5 are provided, each corresponding to one of the four corners of the sealing cover 3. Each fall arrest mechanism 5 includes a second linear actuator 501, a pin 503, and a base 504. The second linear actuator 501 is a cylinder and is fixed to the frame 1 by a bracket. The piston rod of the second linear actuator 501 extends horizontally toward the vacuum chamber 2. The pin 503 is a cylindrical structure, and one end of it is fixed to the end of the piston rod of the second linear actuator 501 by a threaded connection. The base 504 is fixed to the mounting plate on the side of the sealing cover 3 by bolts. The side of the base 504 facing the pin 503 has a fall arrest hole for the pin 503 to be inserted. When the system controller receives a signal that the sealing cover 3 has reached the target lifting position, it controls the second linear actuator 501 to start. Its piston rod extends, causing the pin 503 to move horizontally and insert into the anti-fall hole of the column base 504. The pins 503 of the four anti-fall mechanisms 5 are inserted simultaneously, forming four-point support, stably supporting the sealing cover 3 at the target position. When it is necessary to lower the sealing cover 3, the system controller first controls the piston rod of the second linear actuator 501 to retract, causing the pin 503 to disengage from the anti-fall hole. After reaching the correct position, it controls the lifting mechanism 4 to move. Multi-point support improves load-bearing stability, and the clearance fit ensures that the pin 503 can smoothly insert or disengage. In this embodiment, the second linear actuator 501 can be a pneumatic push rod, an electric push rod, a hydraulic push rod, a linear module, a linear module, a lead screw mechanism, etc. Its main function is to provide the output end for linear motion.

[0070] In the existing fall arrestor 5, the extension and retraction status of the pin 503 cannot be confirmed in real time. This can easily lead to situations where the actuator stops operating before the pin 503 is fully inserted, resulting in unreliable support, or the sealing cover 3 is activated to descend before the pin 503 is fully retracted, causing structural interference. To ensure stable operation of the second linear actuator 501, this invention also includes position sensors. In this embodiment, the position sensors are magnetic switches, comprising two switches, which are respectively fixed to the cylinder of the second linear actuator 501 by clamps. They are set to correspond to the fully extended and fully retracted positions of the pin 503. The signal output terminals of the magnetic switches are electrically connected to the system controller. When the piston rod of the second linear actuator 501 moves the pin 503 to the fully extended position, the magnetic ring on the piston rod triggers the corresponding magnetic switch, sending a "extended in position" signal to the system controller. When the pin 503 moves to the fully retracted position, the other magnetic switch sends a "retracted in position" signal to the system controller. The system controller determines the status of pin 503 based on this signal. When the lifting mechanism 4 has raised the sealing cover to its position, the system controller confirms via signal that pin 503 is in the "extended position" state to prevent the sealing cover 3 from falling. Before closing the sealing cover 3, the system controller confirms via signal that pin 503 is in the "retracted position" state before initiating the descent of the sealing cover 3 to avoid accidental operation.

[0071] The pressing mechanism 6 includes a rotary drive assembly, a rotating shaft 607, a linkage mechanism 608, and a pressing head 606. The rotary drive assembly can be a servo motor and is fixed to the frame 1 via a motor mount, located outside the vacuum chamber 2. The rotating shaft 607 has a stepped shaft structure, with one end connected to the output end of the rotary drive assembly via a coupling, and the other end rotatably connected to the frame 1 via a bearing seat. The axis of the rotating shaft 607 is set in the horizontal direction. The linkage mechanism 608 is connected to the rotating shaft 607, and the pressing head 606 is located at the end of the linkage mechanism 608. The rotary drive assembly drives the rotating shaft 607 to rotate, causing the linkage mechanism 608 to move to the dead position. At this time, the pressing head 606 abuts against the upper surface of the sealing cover 3 and presses it against the vacuum chamber 2. The rotary drive assembly drives the rotating shaft 607 to rotate in the opposite direction, causing the linkage mechanism 608 to move away from the dead position, and the pressing head 606 lifts up to release the sealing cover 3.

[0072] After the sealing cover 3 descends to fit against the vacuum chamber 2, the rotary drive assembly starts, driving the rotating shaft 607 to rotate. The rotating shaft 607 drives the linkage mechanism 608 to move, causing the pressure head 606 to press down on the sealing cover 3. When the linkage mechanism 608 moves to the dead point position, the force between the linkages is transmitted along the axis, forming a self-locking mechanism. At this time, even if the rotary drive assembly stops, the pressure head 606 can still maintain a stable clamping force. When releasing, the rotating shaft 607 rotates in the opposite direction, causing the linkage mechanism 608 to disengage from the dead point, and the pressure head 606 is lifted. The self-locking characteristic at the dead point position improves the clamping stability and avoids the decrease in clamping force caused by external interference.

[0073] In this embodiment, the linkage mechanism 608 includes a fixed block 6081, an intermediate rod 6084, a drive rod 6085, a transmission sleeve 6086, and a clamping rod 6083. The fixed block 6081 is fixed to the frame 1 by bolts and is located below the rotating shaft 607. The rotating shaft 607 is connected to the transmission sleeve 6086 by a key. The transmission sleeve 6086 is fixed to the drive rod 6085. The other end of the drive rod 6085 is hinged to one end of the intermediate rod 6084 by a pin. The other end of the intermediate rod 6084 is hinged to the middle of the clamping rod 6083 by a pin. One end of the clamping rod 6083 is hinged to the fixed block 6081 by a pin, forming a four-bar linkage 608. The pressure head 606 is fixed to the other end of the clamping rod 6083 by an adjustment structure and is positioned towards the sealing cover 3.

[0074] When the rotating shaft 607 rotates, it drives the drive rod 6085 to swing. The drive rod 6085 drives the intermediate rod 6084 to move. The intermediate rod 6084 drives the clamping rod 6083 to rotate around its hinge point with the fixed block 6081, thereby driving the pressure head 606 to rise and fall. The structure of the four-bar linkage 608 makes the power transmission smoother. The torque of the rotary drive component can be amplified by the length ratio of each rod, so that the pressure head 606 can obtain sufficient clamping force, while ensuring the stability of the movement trajectory of the pressure head 606.

[0075] In addition to servo motors, the rotary drive assembly can also be configured with other options in some embodiments, as follows: The rotary drive assembly includes a first hinge support 601, a third linear actuator 602, and a rotating handle 604. The first hinge support 601 is mounted on the frame 1. The fixed end and driving end of the third linear actuator 602 are hinged to the rotating handle 604 and the first hinge support 601, respectively. The rotating handle 604 is drive-connected to the rotating shaft 607. The third linear actuator 602 can be a pneumatic push rod, an electric push rod, a hydraulic push rod, a linear module, a linear module, a lead screw mechanism, etc., and its main function is to provide the output end for linear motion. The first hinge support 601 is fixed to the frame 1. The driving end of the third linear actuator 602 is hinged to the first hinge support 601, and the fixed end is hinged to the rotating handle 604. The rotating handle 604 is drive-connected to the rotating shaft 607, ensuring that the rotation of the rotating handle 604 can drive the rotating shaft 607 to move synchronously. In this embodiment, the third linear actuator 602 selects either a pneumatic cylinder or a hydraulic cylinder. By selecting either a pneumatic cylinder or a hydraulic cylinder for driving, pressure can be continuously applied to the sealing cover 3, avoiding the problem of overheating caused by long-term pressure maintenance of the motor.

[0076] Currently, the pressure head 606 and the clamping rod 6083 are mostly fixedly connected, making it impossible to adjust the position of the pressure head 606 according to the actual situation of the sealing cover 3. When there are installation errors or surface flatness deviations in the sealing cover 3, multiple pressure heads 606 cannot simultaneously adhere to the sealing cover 3, resulting in uneven distribution of clamping force and affecting the sealing effect. The pressure head 606 is connected to the clamping rod 6083 through an adjustment structure, which includes a threaded hole and a stud. The threaded hole is opened in the mounting hole at the end of the clamping rod 6083, and the stud is integrally formed on the upper end of the pressure head 606. The thread parameters of the stud and the threaded hole are matched. After the stud and the threaded hole are threadedly connected, they are locked and fixed by a nut to prevent loosening. During installation or maintenance, loosen the nut and rotate the pressure head 606. Adjust the extension length of the pressure head 606 relative to the clamping rod 6083 by the relative rotation of the stud and the threaded hole, so that the lower end faces of multiple pressure heads 606 are kept on the same horizontal plane. After adjustment, tighten the nut to fix the position of the pressure head 606. By finely adjusting the position of the pressure head 606, it is ensured that all pressure heads 606 can simultaneously fit with the sealing cover 3, achieving uniform compression and adapting to the installation error of the sealing cover 3.

[0077] In this embodiment, multiple sets of linkage mechanism 608 and pressure head 606 are provided. The clamping rod 6083 of each set of linkage mechanism 608 is connected by a reinforcing connecting plate 605 to increase the synchronicity of clamping the sealing cover 3 and increase the strength of the pressure head 606.

[0078] The overall operating principle of this inkjet-printed large-size vacuum chamber opening system is as follows: In the initial state, the sealing cover 3 is pressed against the vacuum chamber 2 by the pressing mechanism 6 to achieve a seal; when it is necessary to open the sealing cover 3, the system controller first controls the rotary drive assembly to start, driving the rotating shaft 607 to rotate in the opposite direction. The rotating shaft 607 drives the drive rod 6085 to swing, and the drive rod 6085 pulls the intermediate rod 6084, causing the pressing rod 6083 to rotate around the hinge point of the fixed block 6081. The pressure head 606 is lifted upward and disengaged from the sealing cover 3 until the linkage mechanism 608 is disengaged from the dead position; the first driver 402 is started, through the main The driven gear drives the driven gear and ball screw to rotate. The ball screw drives the lifting rod 401 to move upward. The lifting rod 401 drives the sealing cover connecting block 405 and the sealing cover 3 to move upward synchronously through the connecting flange. The sealing cover 3 rises smoothly along the guide rod 406 through the linear bearing 407. When the photoelectric switch indicator 408 triggers the photoelectric sensor of the target lifting position, the first driver 402 stops. The system controller controls the piston rod of the second linear driver 501 to extend. The pin 503 is inserted into the anti-fall hole of the column seat 504. The magnetic switch feedback "extended in place" and the sealing cover 3 is stably stopped at the target position, completing the opening process. When the sealing cover 3 needs to be closed, the system controller first controls the piston rod of the second linear actuator 501 to retract, and the pin 503 disengages from the anti-fall hole. After receiving the feedback signal, the first actuator 402 starts to drive the lifting rod 401 and the sealing cover 3 to descend. The linear bearing 407 guides along the guide rod 406 to ensure that the sealing cover 3 is accurately aligned with the vacuum chamber 2. After the rubber sealing gasket of the sealing cover 3 is in contact with the upper surface of the vacuum chamber 2, the lifting rod 401 continues to move downward, and the connecting flange moves downward within the accommodating space of the sealing cover connecting block 405 to avoid rigid impact. The photoelectric sensor provides feedback signal that the sealing cover 3 is in position, and the first actuator 402 stops. Subsequently, the rotary drive assembly starts to drive the rotating shaft 607 to rotate in the forward direction. Through the linkage mechanism 608, the pressure head 606 is driven to press down on the sealing cover 3. When the linkage mechanism 608 moves to the dead point position, the pressure head 606 forms a stable clamping force on the sealing cover 3, and the rotary drive assembly stops, completing the closing and sealing process. Through the coordinated action and precise control of various mechanisms, the entire process achieves automated, reliable opening, closing and tightening of the sealing cover 3, improving the system's operating efficiency and sealing reliability.

[0079] The preferred embodiments of the present invention have been described in detail above, but the present disclosure is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present disclosure.

[0080] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

Claims

1. A large-size vacuum chamber opening system for inkjet printing, characterized in that: include: Rack (1); A vacuum chamber (2) is mounted on the frame (1); A sealing cap (3) is used to seal the vacuum cavity (2); A lifting mechanism (4) is provided on the frame (1) for lifting and lowering the sealing cover (3). A fall protection mechanism (5) is provided on the frame (1) to support the sealing cover (3) after it is raised to the target position. A pressing mechanism (6) is provided on the vacuum chamber (2) or the frame (1) for pressing the sealing cover (3) onto the vacuum chamber (2) or releasing it from the vacuum chamber (2); The fall protection mechanism (5) includes: Second linear actuator (501); The pin (503) is driven by the second linear actuator (501); A column base (504) is provided with a fall-prevention hole for inserting the pin (503); The second linear actuator (501) drives the pin (503) to move in and out of the anti-fall hole. The clamping mechanism (6) includes: A rotary drive assembly is mounted on the frame (1); The rotating shaft (607) is driven to rotate by the rotation drive assembly; The linkage mechanism (608) is connected to the rotating shaft (607) in a transmission manner; A pressure head (606) is disposed at the end of the linkage mechanism (608); The rotary drive assembly can drive the linkage mechanism (608) to move to the dead position, so that the pressure head (606) presses against the sealing cover (3); the rotary drive assembly can drive the linkage mechanism (608) to move away from the dead position, so that the pressure head (606) releases the sealing cover (3). The linkage mechanism (608) includes: a fixed block (6081), an intermediate rod (6084), a drive rod (6085), and a clamping rod (6083). The fixed block (6081) is mounted on the frame (1). The rotating shaft (607) is connected to the drive rod (6085) in a transmission manner. The drive rod (6085), the intermediate rod (6084), and the clamping rod (6083) are hinged in sequence. The clamping rod (6083) is hinged to the fixed block (6081) at another position. The pressure head (606) is mounted on the clamping rod (6083) and faces the sealing cover (3). The pressure head (606) is connected to the clamping rod (6083) through an adjustment structure. The adjustment structure includes a threaded hole and a stud. One of the threaded hole and the stud is provided on the pressure head (606), and the other is provided on the clamping rod (6083). The stud is threadedly connected to the threaded hole.

2. The inkjet-printed large-size vacuum chamber opening system according to claim 1, characterized in that: The lifting mechanism (4) includes: The first driver (402) is mounted on the frame (1). The transmission component is driven by the first driver (402); A lifting rod (401) is connected to the first driver (402) via a transmission assembly. The first driver (402) drives the lifting rod (401) to move up and down via the transmission assembly. A sealing connector (405) is connected to the sealing cap (3). The top side of the sealing connector (405) is provided with a through hole, and the middle part of the sealing connector (405) is provided with an accommodating space. The through hole communicates with the accommodating space. The connecting flange is connected by a lifting rod (401) that passes through the through hole and is connected to the connecting flange. The outer diameter of the connecting flange is larger than the inner diameter of the through hole, so that the connecting flange can move upward with the lifting rod (401) to lift the sealing cover (3). The connecting flange can move along the axial direction of the through hole within the accommodating space.

3. The inkjet-printed large-size vacuum chamber opening system according to claim 2, characterized in that: The lifting mechanism (4) further includes a guide assembly, the guide assembly comprising: The guide rod (406) is connected to the frame (1) at one end and to the vacuum chamber (2) at the other end. A linear bearing (407) is connected to the sealing cover (3), and the sealing cover (3) is movably sleeved on the guide rod (406) via the linear bearing (407).

4. A large-size vacuum chamber opening system for inkjet printing according to claim 2 or 3, characterized in that: The lifting mechanism (4) also includes a position detection component for detecting the position of the sealing cover (3).

5. The inkjet printing large-size vacuum chamber opening system according to claim 1, characterized in that: The second linear actuator (501) is provided with a position sensor for detecting the extension and retraction positions of the pin (503).

6. The inkjet-printed large-size vacuum chamber opening system according to claim 1, characterized in that: The rotary drive assembly includes a first hinge support (601), a third linear actuator (602), and a rotary handle (604). The first hinge support (601) is mounted on the frame (1). The fixed end and the driving end of the third linear actuator (602) are respectively hinged to the rotary handle (604) and the first hinge support (601). The rotary handle (604) is connected to the rotating shaft (607) for transmission.

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