Large-size vacuum cavity uncovering system for ink-jet printing

Abstract

The invention relates to the technical field of vacuum cavity equipment, and discloses an ink-jet printing large-size vacuum cavity uncovering system 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 achieve 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 used for pressing the sealing cover on the vacuum cavity or loosening the sealing cover from the vacuum cavity. According to the system, through cooperative operation of all the mechanisms, the mounting and fixing stability and sealing reliability of the sealing cover are improved, automatic operation of opening, closing and pressing of the sealing cover is achieved, the operation process is simplified, and use convenience and operation safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum cavity equipment, in particular to a large-size vacuum cavity opening system for inkjet printing. BACKGROUND

[0002] The vacuum drying equipment is an important equipment of the substrate drying and film forming system after OLED inkjet printing, can ensure uniform film formation of ink solvent volatilization solute, and is an important component of the complete set of OLED inkjet printing equipment.

[0003] With the increasing demand of the market for large-size OLED displays, the cavity size of the vacuum drying equipment is getting larger and larger, the sealing cover of the vacuum cavity is getting larger and larger, and the weight is getting heavier. When the vacuum equipment is overhauled, the sealing cover of the cavity needs to be smoothly lifted by 800mm-1000mm and held, so that the overhaul personnel can check the inside of the cavity. When the overhaul is completed, the sealing cover needs to be lowered to tightly fit with the vacuum cavity. The existing method is to fix the sealing cover on the cavity by bolts at the edge of the sealing cover. Since the sealing cover plate is very large, dozens of bolts are needed to fix it on the cavity, which is a large amount of work and very tedious. SUMMARY

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

[0005] The present application provides a large-size vacuum cavity opening system for inkjet printing, comprising: a rack; a vacuum cavity arranged on the rack; a sealing cover for sealing the vacuum cavity; a lifting mechanism arranged on the rack and used for lifting and lowering the sealing cover; a fall-preventing mechanism arranged on the rack and used for supporting the sealing cover after the sealing cover is lifted to a target position; a pressing mechanism arranged on the vacuum cavity or the rack and used for pressing the sealing cover on the vacuum cavity or releasing the sealing cover from the vacuum cavity.

[0006] The present application has the following advantages: the large-size vacuum cavity opening system for inkjet printing provides a stable installation basis for each component through the rack, realizes the sealing function through the cooperation of the vacuum cavity and the sealing cover, realizes the lifting operation of the sealing cover through the lifting mechanism, forms an effective support after the sealing cover is lifted to a target position through the fall-preventing mechanism, and completes the pressing and releasing actions between the sealing cover and the vacuum cavity through the pressing mechanism. The components work together to make the installation and fixation of the sealing cover more stable, effectively improve the sealing reliability, and automatically realize the lifting, supporting and pressing operations, which greatly simplifies the operation process of the sealing cover opening and closing and pressing, and improves the operation convenience and automation degree.

[0007] As some sub-schemes of the above technical solutions, the lifting mechanism comprises: a first driver arranged on the rack, a transmission assembly driven by the first driver; a lifting rod, the lifting rod being in transmission connection with the first driver through the transmission assembly, the first driver driving the lifting rod to move up and down through the transmission assembly; a cover connecting block connected with the sealing cover, a through hole being arranged on the top side of the cover connecting block, and a containing space being arranged in the middle of the cover connecting block, the through hole being in communication with the containing space; a connecting flange, the lifting rod passing through the through hole and being connected with the connecting flange, the outer diameter of the connecting flange being greater than the inner diameter of the through hole so that the connecting flange can lift the sealing cover when moving up with the lifting rod; wherein the connecting flange is movable along the axis direction of the through hole in the containing space.

[0008] The lifting mechanism provides power through the first driver, and the power is transmitted to the lifting rod through the transmission assembly. The through hole and the containing space structure of the cover connecting block enable the connecting flange and the lifting rod to stably drive the sealing cover to lift and allow the connecting flange to move along the axis of the through hole in the containing space. This structure design enables the sealing cover to better adapt to the sealing surface of the vacuum cavity during the sealing process, reduces the stress concentration caused by rigid contact, further improves the sealing performance and reliability of the sealing cover and the vacuum cavity, and stabilizes the power transmission, thereby ensuring the smoothness of the opening and closing process.

[0009] As some sub-schemes of the above technical solutions, the lifting mechanism further comprises a guide assembly, the guide assembly comprising: a guide rod, one end of the guide rod being connected with the rack and the other end of the guide rod being connected with the vacuum cavity; a linear bearing, the linear bearing being connected with the sealing cover, and the sealing cover being movably sleeved on the guide rod through the linear bearing.

[0010] The cooperation of the guide rod and the linear bearing in the guide assembly provides precise guidance for the lifting movement of the sealing cover. The sealing cover is movably sleeved on the guide rod through the linear bearing, which effectively limits the deviation of the sealing cover during the lifting process, ensures that the sealing cover always moves along the preset track, makes the alignment of the sealing cover and the vacuum cavity more precise, avoids poor sealing caused by deviation, improves the reliability of the opening and closing and sealing of the sealing cover, and also makes the lifting action more stable.

[0011] As some sub-schemes of the above technical solutions, the lifting mechanism further comprises a position detection assembly for detecting the position of the sealing cover. The position detection assembly provides a position basis for the timely support of the anti-falling mechanism and the accurate action of the pressing mechanism, ensuring the coordination of the actions of each mechanism and further improving the reliability and automation accuracy of the entire system operation.

[0012] As some sub-schemes of the above technical solutions, the anti-falling mechanism comprises: a second linear driver; a pin column driven by the second linear driver; a column seat provided with an anti-falling hole for inserting the pin column; wherein the second linear driver drives the pin column to enter and exit the anti-falling hole.

[0013] The second linear driver of the anti-falling mechanism drives the pin column to enter and exit the anti-falling hole of the column seat, realizing the support and release of the sealing cover. When the sealing cover is lifted to the target position, the pin column inserted into the anti-falling hole can form stable support, effectively reducing the risk of accidental falling of the sealing cover, providing reliable safety protection for the sealing cover in the lifted state, and improving the operation safety of the entire system and the use reliability of the sealing cover.

[0014] As some sub-schemes of the above technical solutions, the second linear driver is provided with a position sensor for detecting the extension and retraction positions of the pin column. The position sensor provided on the second linear driver can accurately detect the extension and retraction positions of the pin column. Through the position signal feedback of the magnetic switch, it can be confirmed in real time whether the pin column is completely inserted into the anti-falling hole to form reliable support, or whether it is completely retracted without affecting the lifting of the sealing cover, avoiding the problem of anti-falling protection failure or interference with the movement of the sealing cover caused by uncertain position of the pin column. It provides accurate basis for the action control of the anti-falling mechanism, improves the reliability of the anti-falling mechanism, and further improves the automation control logic of the system.

[0015] As some sub-schemes of the above technical solutions, the pressing mechanism comprises: a rotary driving assembly provided on the rack; a rotating shaft driven to rotate by the rotary driving assembly; a connecting rod mechanism in transmission connection with the rotating shaft; a pressing head provided at the end of the connecting rod mechanism; wherein the rotary driving assembly can drive the connecting rod mechanism to move to a dead point position, so that the pressing head presses the sealing cover; the rotary driving assembly can drive the connecting rod mechanism to move away from the dead point position, so that the pressing head releases the sealing cover.

[0016] In the pressing mechanism, the rotary driving assembly drives the rotating shaft to rotate, the rotating shaft drives the connecting rod mechanism to move, and then drives the pressing head to realize the pressing and loosening of the sealing cover; when the rotary driving assembly drives the connecting rod mechanism to move to the dead point position, the pressing head can form a stable pressing force on the sealing cover, and the structural characteristics of the dead point position make the pressing state not easy to change due to external force interference, thereby improving the sealing reliability; when the connecting rod mechanism is away from the dead point position, the pressing head can quickly loosen the sealing cover, and the operation is convenient, and the structure realizes efficient conversion of the pressing and loosening actions, and meets the automatic opening and closing requirements.

[0017] As some sub-solutions of the above technical solutions, the connecting rod mechanism comprises a fixed block, an intermediate rod, a driving rod and a pressing rod, the fixed block is arranged on the rack, the rotating shaft is in transmission connection with the driving rod, the driving rod, the intermediate rod and the pressing rod are sequentially hinged, and the pressing rod is hinged with the fixed block at another position, and the pressing head is arranged on the pressing rod and faces the sealing cover. The connecting rod mechanism is fixed on the rack through the fixed block, the rotating shaft is in transmission connection with the driving rod, the driving rod, the intermediate rod and the pressing rod are sequentially hinged, the pressing rod is hinged with the fixed block at the same time, and the pressing head is arranged on the side of the pressing rod facing the sealing cover. The multi-rod hinged structure enables the torque of the rotary driving assembly to be smoothly transmitted to the pressing head, the force transmission direction and size are changed through the cooperative movement of the rods, the pressing force of the pressing head on the sealing cover is more uniform, the pressing effect and the sealing reliability are improved, and the structure layout is compact, so that the installation and arrangement on the rack are facilitated.

[0018] As some sub-solutions of the above technical solutions, the rotary driving assembly comprises a first hinged support, a third linear driver and a rotating handle, the first hinged support is arranged on the rack, the fixed end and the driving end of the third linear driver are hinged with the rotating handle and the first hinged support respectively, and the rotating handle is in transmission connection with the rotating shaft. The first hinged support provides a stable reference, the two ends of the third linear driver are hinged with the rotating handle and the first hinged support respectively, the double-hinged design can eliminate lateral force and installation error, reduce rigid impact, reduce wear and prolong service life.

[0019] As some sub-solutions of the above technical solutions, the pressing head is connected with the pressing rod through an adjusting structure, the adjusting structure comprises a threaded hole and a stud, one of the threaded hole and the stud is arranged on the pressing head, and the other is arranged on the pressing rod, and the stud is in threaded connection with the threaded hole. The pressing head is connected with the pressing rod through the adjusting structure composed of the threaded hole and the stud, and the extension length of the pressing head relative to the pressing rod can be adjusted through the threaded cooperation of the stud and the threaded hole. According to the actual installation situation of the sealing cover and the sealing requirement, the position of the pressing head can be adjusted, so that multiple pressing heads can be simultaneously attached to the sealing cover and apply uniform pressing force, the sealing requirement under different working conditions is adapted, and the universality and sealing reliability of the pressing mechanism are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which: Figure 1 Structure diagram of a large-size vacuum cavity uncovering system for inkjet printing according to the present application; Figure 2 Structure diagram of a lifting mechanism; Figure 3 Structure diagram of a falling-prevention mechanism; Figure 4 Structure diagram of a pressing mechanism in a pressing state; Figure 5 Structure diagram of a pressing mechanism in a pressing state; Figure 6 Structure diagram of a pressing mechanism in a releasing state.

[0021] In the drawings: 1 - frame; 2 - vacuum cavity; 3 - sealing cover; 4 - lifting mechanism; 401 - lifting rod; 402 - first driver; 403 - commutator; 405 - cover connecting block; 406 - guide rod; 407 - linear bearing; 408 - photoelectric switch indicating piece; 409 - photoelectric switch assembly; 5 - falling-prevention mechanism; 501 - second linear driver; 503 - pin post; 504 - post seat; 6 - pressing mechanism; 601 - first hinge seat; 602 - third linear driver; 604 - rotating handle; 605 - reinforcing connecting plate; 606 - pressing head; 607 - rotating shaft; 608 - connecting rod mechanism; 6081 - fixed block; 6083 - pressing rod; 6084 - intermediate rod; 6085 - driving rod. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as limiting the present application.

[0023] The following description is made with reference to the accompanying drawings. Figures 1 to 6 The embodiments of the present application are described below.

[0024] The sealing cover 3 of the large-size vacuum cavity 2 for inkjet printing is usually opened and closed by manual or simple mechanical structure, which is not only laborious and inefficient, but also difficult to adapt to the automatic production process. In addition, the pressure control is uneven during the pressing process, the fitting precision of the sealing cover 3 and the vacuum cavity 2 is poor, the sealing reliability is insufficient, and the vacuum leakage problem easily occurs to affect the printing quality.

[0025] The embodiment provides a large-size vacuum cavity opening system for inkjet printing, as shown in the drawings, comprising a rack 1, a vacuum cavity 2 is fixedly arranged on the rack 1, and a sealing cover 3 for sealing the opening of the vacuum cavity 2 is arranged above the vacuum cavity 2; a lifting mechanism 4 for lifting and lowering the sealing cover 3 is installed on the top of the rack 1, anti-falling mechanisms 5 are arranged on both sides of the rack 1 close to the vacuum cavity 2 for supporting the sealing cover 3 after the sealing cover 3 is lifted to the target position, and a pressing mechanism 6 is arranged on the outer circumferential side of the vacuum cavity 2 corresponding to the edge position of the sealing cover 3 for pressing the sealing cover 3 on the vacuum cavity 2 or releasing the sealing cover 3 from the vacuum cavity 2. Figure 1

[0026] The automatic lifting of the sealing cover 3 is realized by the lifting mechanism 4, which replaces the manual operation to improve the opening and closing efficiency; the anti-falling mechanism 5 forms a mechanical support after the sealing cover 3 is lifted, which avoids the falling risk caused by the failure of the lifting mechanism 4; the pressing mechanism 6 provides stable and uniform pressing force, which improves the sealing reliability in cooperation with the rubber sealing pad on the sealing cover 3; the cooperation of the mechanisms makes the opening and closing and pressing process of the sealing cover 3 adapt to the automatic production, while ensuring the sealing effect.

[0027] ​The existing lifting mechanism 4 is rigidly connected to the sealing cover 3, and when the vacuum cavity 2 is deformed after being connected to negative pressure, stress is easily caused to the lifting rod 401, reducing the service life of the lifting rod 401. Further, in an embodiment of the present application, the lifting mechanism 4 comprises a first driver 402, which is selected as a servo motor and is fixed on the top of the rack 1 through a motor base. The output end of the first driver 402 is connected with a transmission assembly. In the present embodiment, the transmission assembly comprises a first bevel gear, a second bevel gear, a rotating rod, a shaft coupling, a reversing device 403 and a worm gear and worm lifting machine. The lifting rod 401 is the output end of the worm gear and worm lifting machine. There are totally four worm gear and worm lifting machines, two of which are arranged on each side of the first driver 402. The four worm gear and worm lifting machines are distributed in a rectangular shape and are symmetrically arranged with respect to 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 shaft coupling and the reversing device 403 are sequentially transmissionally connected. The reversing device 403 comprises two rotating rods for output power. The two rotating rods are respectively transmissionally connected with the two worm gear and worm lifting machines to drive the lifting rod 401 to move up and down.

[0028] After the first driver 402 is started, the lifting rod 401 of the worm gear and worm lifting machine is synchronously moved up and down through the first bevel gear, the second bevel gear, the rotating rod and the reversing device 403. When the lifting rod 401 moves up, the connecting flange moves up in the accommodating space and abuts against the top wall of the accommodating space, thereby driving the cover connecting block 405 and the sealing cover 3 to be lifted. When the lifting rod 401 moves down, the sealing cover 3 is first contacted with the vacuum cavity 2, and the connecting flange moves down in the accommodating space to be not in contact with the inner wall of the accommodating space (including any inner wall surrounding the accommodating space), so that when the vacuum cavity 2 is deformed after being connected to negative pressure, the deformation of the vacuum cavity 2 will not cause stress to the connecting flange through the inner wall of the accommodating space, avoiding the reduction of the service life of the lifting rod 401 due to the stress caused to the lifting rod 401.

[0029] Further, the application also provides a guide assembly, which comprises guide rods 406 and linear bearings 407. The guide rods 406 are arranged at four corners of the vacuum cavity 2, and the upper ends of the guide rods 406 are fixedly connected to the rack 1 through flanges, and the lower ends are fixedly connected to the upper surface of the vacuum cavity 2, and the axes of the guide rods 406 are parallel to the axis of the lifting rod 401. The linear bearings 407 are fixedly connected to the lower edge of the sealing cover 3 through mounting seats, the inner holes of the linear bearings 407 are matched with the outer diameters of the guide rods 406, and the sealing cover 3 is movably sleeved on the guide rods 406 through the linear bearings 407. When the sealing cover 3 is lifted 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 track of the sealing cover 3 and limit the radial deviation of the sealing cover 3, and the symmetrical arrangement of the four guide rods 406 makes the stress of the sealing cover 3 more uniform. Through the cooperation of the guide rods 406 and the linear bearings 407, it is ensured that the sealing cover 3 always moves along the preset track, the alignment accuracy of the sealing cover 3 and the sealing surface of the vacuum cavity 2 is improved, and the collision risk is reduced.

[0030] Further, the application also provides a position detection assembly, which comprises a photoelectric switch indicating piece 408 and a photoelectric switch assembly 409. The photoelectric switch indicating piece 408 is fixed on the mounting seat on the side of the sealing cover 3 through bolts, and the horizontal section of the photoelectric switch indicating piece 408 extends towards the rack 1. The photoelectric switch assembly 409 comprises a plurality of photoelectric sensors, and the photoelectric sensors are fixed on the rack 1 through supports and are arranged at the initial position (the state of being attached to the vacuum cavity 2), the target lifting position and the intermediate positioning position in the lifting process of the sealing cover 3 respectively. The sensing end of the photoelectric sensor faces the photoelectric switch indicating piece 408, the signal output end of the photoelectric sensor is connected to the system controller through wires, and the system controller is electrically connected to the first driver 402.

[0031] When the sealing cover 3 is lifted, the photoelectric switch indicating piece 408 moves synchronously, when the indicating piece moves to the sensing area of a photoelectric sensor, the photoelectric sensor sends a position signal to the system controller, and the system controller controls the start-stop or speed adjustment of the first driver 402 according to the preset program. When the sealing cover 3 reaches the target lifting position, the photoelectric sensor at the corresponding position feeds back a signal, the system controller controls the first driver 402 to stop, and triggers the anti-falling mechanism 5 to act at the same time. Through real-time detection of the position of the sealing cover 3 and closed-loop control, the operation accuracy of the lifting mechanism 4 is improved, and the problem of excessive lifting is avoided.

[0032] The anti-falling mechanism 5 is provided with four and corresponds to the four corner positions of the sealing cover 3 respectively, each anti-falling mechanism 5 comprises a second linear actuator 501, a pin column 503 and a column seat 504, the second linear actuator 501 is selected from a pneumatic cylinder and is fixed on the rack 1 through a support, the piston rod of the second linear actuator 501 extends horizontally towards the side of the vacuum cavity 2; the pin column 503 is a cylindrical structure, one end of which is fixed through threaded connection with the end of the piston rod of the second linear actuator 501; the column seat 504 is fixed on the mounting plate on the side of the sealing cover 3 through bolts, and a anti-falling hole for the pin column 503 to insert is formed on the side of the column seat 504 facing the pin column 503. When the system controller receives the signal that the sealing cover 3 reaches the target lifting position, the second linear actuator 501 is controlled to start, the piston rod of which extends to drive the pin column 503 to move horizontally and insert into the anti-falling hole of the column seat 504, and the pin columns 503 of the four anti-falling mechanisms 5 are synchronously inserted to form four-point support, thereby stably supporting the sealing cover 3 at the target position; when the sealing cover 3 needs to be lowered, the system controller first controls the piston rod of the second linear actuator 501 to retract, thereby driving the pin column 503 to disengage from the anti-falling hole, and then controls the lifting mechanism 4 to act after reaching the position. The multi-point support improves the bearing stability, and the gap cooperation ensures that the pin column 503 can be smoothly inserted or disengaged. The second linear actuator 501 in the embodiment can be selected from a pneumatic push rod, an electric push rod, a hydraulic push rod, a linear module, a linear module, a screw mechanism, etc., and the main effect is to provide a linear motion output end.

[0033] In the existing anti-falling mechanism 5, the extension state of the pin column 503 cannot be confirmed in real time, and the pin column 503 may stop driving before being fully inserted, resulting in unreliable support, or the sealing cover 3 may be lowered before the pin column 503 is fully retracted, causing structural interference. In order to make the second linear actuator 501 run stably, the position sensor is also provided in the present application, which is a magnetic switch in the embodiment, and two magnetic switches are fixed on the cylinder barrel of the second linear actuator 501 through a clamp, corresponding to the fully extended position and the fully retracted position of the pin column 503, and the signal output end of the magnetic switch is electrically connected with the system controller. When the piston rod of the second linear actuator 501 drives the pin column 503 to move to the fully extended position, the magnetic ring on the piston rod triggers the corresponding magnetic switch to send a “extended to position” signal to the system controller; when the pin column 503 moves to the fully retracted position, the other magnetic switch sends a “retracted to position” signal to the system controller. The system controller judges the state of the pin column 503 according to the signal, and when the lifting mechanism 4 lifts the sealing cover to the position, it is determined through the signal that the pin column 503 is in the “extended to position” state to prevent the sealing cover 3 from falling. Before the sealing cover 3 needs to be closed, it is determined through the signal that the pin column 503 is in the “retracted to position” state, and then the sealing cover 3 is lowered to avoid misoperation.

[0034] The pressing mechanism 6 comprises a rotary drive assembly, a rotating shaft 607, a connecting rod mechanism 608 and a pressing head 606. The rotary drive assembly can be a servo motor and is fixed on the rack 1 through a motor base outside the vacuum cavity 2. The rotating shaft 607 is a stepped shaft structure, one end of which is in transmission connection with the output end of the rotary drive assembly through a shaft coupling, and the other end is in rotational connection with the rack 1 through a bearing seat. The axis of the rotating shaft 607 is arranged in a horizontal direction. The connecting rod mechanism 608 is in transmission connection with the rotating shaft 607, and the pressing head 606 is arranged at the end of the connecting rod mechanism 608. The rotary drive assembly drives the rotating shaft 607 to rotate, drives the connecting rod mechanism 608 to move to a dead point position, at which the pressing head 606 abuts against the upper surface of the sealing cover 3 and presses the sealing cover 3 tightly on the vacuum cavity 2. The rotary drive assembly drives the rotating shaft 607 to rotate reversely, drives the connecting rod mechanism 608 to move away from the dead point position, and the pressing head 606 is lifted upward to release the sealing cover 3.

[0035] After the sealing cover 3 is lowered to be attached to the vacuum cavity 2, the rotary drive assembly is started to drive the rotating shaft 607 to rotate, the rotating shaft 607 drives the connecting rod mechanism 608 to move, and the pressing head 606 is pressed downward to the sealing cover 3. When the connecting rod mechanism 608 moves to the dead point position, the force between the connecting rods is transmitted in the direction of the rod shaft, forming self-locking. At this time, even if the rotary drive assembly stops, the pressing head 606 can still maintain stable pressing force. When released, the rotating shaft 607 reversely rotates to drive the connecting rod mechanism 608 to move away from the dead point, and the pressing head 606 is lifted up. The self-locking property of the dead point position improves the pressing stability and avoids the interference of external force to cause the decrease of the pressing force.

[0036] In the embodiment, the connecting rod mechanism 608 comprises a fixed block 6081, an intermediate rod 6084, a driving rod 6085, a transmission sleeve 6086 and a pressing rod 6083. The fixed block 6081 is fixed on the rack 1 through bolts and is located below the rotating shaft 607. The rotating shaft 607 is in transmission connection with the transmission sleeve 6086 through a key, the transmission sleeve 6086 is fixedly connected with the driving rod 6085, the other end of the driving rod 6085 is hingedly connected with one end of the intermediate rod 6084 through a pin shaft, the other end of the intermediate rod 6084 is hingedly connected with the middle part of the pressing rod 6083 through a pin shaft, one end of the pressing rod 6083 is hingedly connected with the fixed block 6081 through a pin shaft, forming a four-bar linkage mechanism 608. The pressing head 606 is fixed on the other end of the pressing rod 6083 through an adjusting structure, and the pressing head 606 is arranged toward the sealing cover 3.

[0037] When the rotating shaft 607 rotates, the driving rod 6085 swings, the driving rod 6085 drives the intermediate rod 6084 to move, the intermediate rod 6084 drives the pressing rod 6083 to rotate around the hinged point of the pressing rod 6083 and the fixed block 6081, and further drives the pressing head 606 to realize lifting. The structure of the four-bar linkage mechanism 608 makes the power transmission more stable, the length ratio of the rods can amplify the torque of the rotary drive assembly, so that the pressing head 606 can obtain sufficient pressing force, and at the same time, the movement track of the pressing head 606 is stable.

[0038] The rotating driving assembly can select a servo motor, and in other embodiments, other schemes can be selected, as follows: the rotating driving assembly includes a first hinged support 601 provided on the rack 1, a third linear driver 602, and a rotating handle 604, the fixed end and the driving end of the third linear driver 602 are hinged to the rotating handle 604 and the first hinged support 601 respectively, and the rotating handle 604 is in transmission connection with a rotating shaft 607. The third linear driver 602 can be a pneumatic push rod, an electric push rod, a hydraulic push rod, a linear module, a linear module, a screw mechanism, etc., which mainly provides a linear motion output end. The first hinged support 601 is fixed to the rack 1, the driving end of the third linear driver 602 is hinged to the first hinged support 601, the fixed end is hinged to the rotating handle 604, the rotating handle 604 is in transmission connection with the rotating shaft 607, and the rotating handle 604 is rotated to drive the rotating shaft 607 to move synchronously. In this embodiment, the third linear driver 602 selects a pneumatic cylinder or an oil cylinder, which can continuously apply pressure to the sealing cover 3, avoiding the problem of easy overheating caused by long-term pressure retention of the motor.

[0039] The existing pressure head 606 and the pressing rod 6083 are mostly fixedly connected, and the position of the pressure head 606 cannot be adjusted according to the actual situation of the sealing cover 3. When there is an installation error or a surface flatness deviation of the sealing cover 3, the plurality of pressure heads 606 cannot simultaneously fit the sealing cover 3, resulting in uneven distribution of pressing force and affecting the sealing effect. The pressure head 606 is connected with the pressing rod 6083 through an adjusting structure, the adjusting structure includes a threaded hole and a stud, the threaded hole is arranged in an installation hole at the end of the pressing rod 6083, the stud is integrally formed at the upper end of the pressure head 606, the threaded parameters of the stud and the threaded hole are matched, and after the threaded connection of the stud and the threaded hole, the locking and fixing are performed through a nut to prevent loosening. During installation or maintenance, the nut is loosened, the pressure head 606 is rotated, the extension length of the pressure head 606 relative to the pressing rod 6083 is adjusted through the relative rotation of the stud and the threaded hole, and the lower end surfaces of the plurality of pressure heads 606 are kept on the same horizontal plane; after the adjustment is completed, the nut is tightened to fix the position of the pressure head 606. The position of the pressure head 606 is adjusted, so that all the pressure heads 606 can simultaneously fit the sealing cover 3, uniform pressing is realized, and the installation error of the sealing cover 3 is adapted.

[0040] The connecting rod mechanism 608 and the pressure head 606 in this embodiment are provided in multiple groups, the pressing rods 6083 of the connecting rod mechanisms 608 in each group are connected through the reinforcing connecting plates 605, so as to increase the synchronism of pressing the sealing cover 3 and increase the strength of the pressure head 606.

[0041] The overall operation principle of the large-size vacuum cavity opening system of the inkjet printing is as follows: in the initial state, the sealing cover 3 is pressed on the vacuum cavity 2 by the pressing mechanism 6 to realize sealing; when the sealing cover 3 needs to be opened, the system controller first controls the rotary drive assembly to start, drives the rotating shaft 607 to rotate reversely, drives the driving rod 6085 to swing, drives the intermediate rod 6084 to move, drives the pressing rod 6083 to rotate around the fixed block 6081 hinge point, drives the pressing head 606 to lift up and separate from the sealing cover 3, and drives the connecting rod mechanism 608 to separate from the dead point position; the first drive 402 starts, drives the driven gear and the ball screw to rotate through the driving gear, drives the lifting rod 401 to move up through the ball screw, drives the sealing cover connecting block 405 and the sealing cover 3 to move up synchronously through the connecting flange, and drives the sealing cover 3 to stably rise along the guide rod 406 through the linear bearing 407; when the photoelectric switch indicating piece 408 triggers the photoelectric sensor of the target lifting position, the first drive 402 stops, the system controller controls the second linear drive 501 piston rod to extend, the pin column 503 is inserted into the anti-falling hole of the column seat 504, the magnetic switch feeds back that it is “extended to the position”, the sealing cover 3 is stably parked at the target position, and the opening process is completed. When the sealing cover 3 needs to be closed, the system controller first controls the second linear drive 501 piston rod to retract, the pin column 503 separates from the anti-falling hole, and after feeding back the in-position signal, the first drive 402 starts to drive the lifting rod 401 and the sealing cover 3 to descend, the linear bearing 407 is guided along the guide rod 406 to ensure that the sealing cover 3 is accurately positioned with the vacuum cavity 2; after the rubber sealing gasket of the sealing cover 3 is attached to the upper surface of the vacuum cavity 2, the lifting rod 401 continues to move down, the connecting flange moves downward in the containing space of the sealing cover connecting block 405 to avoid rigid impact, the photoelectric sensor feeds back the in-position signal of the sealing cover 3, and the first drive 402 stops; then the rotary drive assembly starts to drive the rotating shaft 607 to rotate forward, drives the pressing head 606 to press downward to the sealing cover 3 through the connecting rod mechanism 608, and when the connecting rod mechanism 608 moves to the dead point position, the pressing head 606 forms a stable pressing force on the sealing cover 3, the rotary drive assembly stops, and the closing and sealing process is completed. Through the coordinated action and accurate control of each mechanism, the automatic, reliable opening and closing and pressing of the sealing cover 3 are realized, and the operation efficiency and sealing reliability of the system are improved.

[0042] The preferred embodiments of the present application are specifically described above, but the present disclosure is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present disclosure.

[0043] In the description of the application, it should be understood that the relative description of position, such as up, down, front, back, left, right and the like, is based on the position or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation of the application.

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).

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 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.

6. The inkjet-printed large-size vacuum chamber opening system according to claim 5, 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).

7. The inkjet printing large-size vacuum chamber opening system according to claim 5, characterized in that: 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 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).

8. The inkjet-printed large-size vacuum chamber opening system according to claim 7, characterized in that: 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 are hinged in sequence. The clamping rod 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).

9. A large-size vacuum chamber opening system for inkjet printing according to claim 7, 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.

10. A large-size vacuum chamber opening system for inkjet printing according to claim 8, characterized in that: The pressure head (606) is connected to the clamping rod through an adjustment structure, the adjustment structure including a threaded hole and a stud, one of which is provided on the pressure head (606) and the other is provided on the clamping rod (6083), and the stud is threadedly connected to the threaded hole.

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