Printing mechanism of printing machine

Abstract

The printing mechanism comprises a plate roller supporting device and a plate roller transmission device, a rotating main shaft of the plate roller transmission device is arranged on a supporting frame, a roller shaft holding and clamping opening is formed in the front end of the rotating main shaft, separation gaps are formed between holding and clamping jaw units on the periphery of the roller shaft holding and clamping opening, and holding and clamping transmission outer surfaces are arranged on the outer side faces of the holding and clamping jaw units; the clamping elastic transmission body is provided with a clamping transmission inner surface, and the clamping transmission inner surface is arranged on the outer side of the clamping transmission outer surface in a matched mode for transmission fit. The roller shaft of the plate roller does not need to be directly connected with the driving motor in a whole through shaft mode, the roller shaft of the plate roller can be independently disassembled and assembled, disassembling and assembling are relatively convenient and efficient, the roller shaft of the plate roller is clamped and loosened by the roller shaft holding and clamping opening to be assembled and disassembled in a matched mode, and clamping and opening of the roller shaft holding and clamping opening can be achieved by operating the holding and clamping elastic transmission body to act on the holding and clamping jaw unit. The plate roller is simple in structure, practical and convenient, the roller shaft of the plate roller is more convenient to replace and maintain, and the plate roller has more advantages for the use scene of the plate roller with the roller and the roller shaft integrated structure.

Description

Technical Field

[0001] The present invention relates to a printing press, and more particularly to a printing mechanism. This invention is a divisional application of the original application number 202311405627.0 and the original filing date 2023-10-27. Background Art

[0002] The printing mechanism (such as the flexographic mechanism) in a printing press features a plate roller. This roller must be raised and lowered to facilitate plate changes and engage and disengage (disengage when printing is paused, and engage and disengage when printing resumes). Furthermore, the plate roller must move axially for color registration, ensuring that the patterns on different plate rollers align. Furthermore, the plate roller descends between the anilox roller and the printing plate, requiring automatic centering. Currently, the support structure for achieving this function is not optimal. For example, the roller must be raised and lowered significantly for both plate changes and brief printing pauses. Furthermore, the automatic centering and axial movement for color registration occupy a relatively large amount of space.

[0003] In addition, printing mechanisms (such as flexographic printing mechanisms) have a plate roller for printing, with a printing plate mounted on the circumferential surface of the plate roller. Currently, the plate roller can be a split structure (i.e., a roller shaft and a roller mounted on the roller shaft), or a one-piece structure (i.e., the roller shaft and the roller are connected as a whole). In both types of structures, the roller shaft of the plate roller is a through-shaft structure, which is directly connected to the drive motor. Some mechanical transmission structure is also required for connection, making the roller shaft difficult to disassemble and assemble. During use, when repair, maintenance, replacement, or specification changes are required, the entire transmission connection structure between the roller shaft and the drive motor must be disassembled and assembled, which is time-consuming and labor-intensive. In addition, the roller shaft of this through-shaft structure is usually designed to replace and install the printing plate sleeve, thereby avoiding frequent disassembly and assembly of the roller shaft. Only the printing plate sleeve needs to be replaced and installed. However, the additional structure for replacing and installing the printing plate sleeve not only makes the plate roller structure more complicated, but also causes many problems such as deviation in the relative position of the printing plate sleeve and the roller shaft, resulting in inaccurate printing. Summary of the Invention

[0004] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a printing mechanism of a printing press with more convenient roller disassembly and assembly, and subsequently optimized support frame lifting and lowering operation and relatively compact structure.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a printing mechanism of a printing press includes a plate roller support device and a plate roller transmission device, the plate roller support device includes a support frame, and the plate roller transmission device is installed on the support frame, and is characterized in that: the plate roller transmission device includes a rotating spindle and a clamping and tightening transmission body, the rotating spindle is arranged on the support frame of the plate roller support device, a rotating support component is provided between the rotating spindle and the support frame, a roller clamping opening is provided at the front end of the rotating spindle, the roller clamping opening is surrounded by clamping claw units, and the clamping claw units are separated by gaps, each clamping claw unit encloses the roller clamping opening on the inner side, and the outer side surface of the clamping claw unit is provided with a clamping transmission outer surface; The clamping transmission body has a clamping transmission inner surface, which is arranged on the outside of the clamping transmission outer surface. The clamping transmission inner surface and the clamping transmission outer surface are arranged in transmission cooperation.

[0006] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0007] For example, a roller support portion is provided at the front end of the support frame, and a roller pressure cover is provided above the roller support portion, and the roller pressure cover is installed on the support frame; an installation position for the roller bearing is reserved between the roller pressure cover and the roller support portion; the shaft head of the roller is installed in the roller clamping mouth.

[0008] For example, the support frame has a mounting hole, the rotating spindle and the clamping and tightening transmission body are disposed within the mounting hole, the rotating spindle axially extends through the mounting hole, and the rotating support component is disposed between the rotating spindle and the mounting hole. For example, the rotating drive motor is connected to the drive shaft, and a coupling is provided between the drive shaft and the rotating spindle. In addition, the support frame also has a rotating drive motor, which is connected to the rotating spindle.

[0009] For another example, the clamping tension transmission body adopts a clamping sleeve, the inner surface of the clamping transmission is located on the inner ring of the clamping sleeve, and the clamping sleeve is sleeved outside the rotating main shaft; the clamping claw units are arranged along the circumferential direction on the rotating main shaft.

[0010] For example, the inner surface of the clamp transmission adopts an inner conical surface, and / or the outer surface of the clamp transmission adopts an outer conical surface. For example, the inner conical surface and / or the outer conical surface adopts a conical surface or a frustum cone surface.

[0011] The clamping claw units can be evenly arranged in the circumferential direction.

[0012] In addition, the clamping tensioning transmission body has a clamping claw unit at the front or rear, with a gap separating the clamping claw units. The inner surface of the clamping transmission is located on the inner side of the clamping claw unit. A clamping adjustment sleeve is also connected to the outside of the clamping tensioning transmission body, and a clamping adjustment nut is connected between the clamping adjustment sleeve and the clamping tensioning transmission body. The clamping tensioning transmission body is in transmission connection with an axially movable transmission device. For example, the axially movable transmission device includes a shift fork arm, which is hinged to a support frame or axially movable on the support frame. The shift fork arm is provided with a transmission component, and the clamping tensioning transmission body has a groove in which the transmission component is disposed. For example, the groove is an annular groove, and the transmission component is a roller. The clamping tensioning transmission body is connected to the rotating main shaft. The axially movable transmission device also includes a shift fork transmission member, which is in transmission connection with the shift fork arm. The shift fork transmission member includes a shift fork power source or a shift fork handle with a locking unit.

[0013] In addition, a spiral groove is provided on the rotating main shaft, and the spiral groove takes the central axis of the rotating main shaft as the center line; a hollow cavity of the rotating main shaft is provided at the center of the spiral groove, and the hollow cavity communicates with the outer side of the rotating main shaft through the spiral groove.

[0014] A supporting core shaft can also be provided in the hollow cavity of the rotating main shaft, with a movable gap left between the supporting core shaft and the rotating main shaft; a center hole is provided at the central axis of the rotating main shaft, the rear end of the supporting core shaft is fixedly connected to the rotating main shaft, the center hole includes the hollow cavity, and the supporting core shaft is passed through the center hole.

[0015] The support frame is arranged to be lifted and lowered. For example, the plate roller support device further includes a first lifting seat, a second lifting seat, a rotating shaft, and a swinging seat. The first lifting seat is connected to the second lifting seat. One of the first and second lifting seats is in transmission connection with the floating drive device, and the other is in transmission connection with the lifting drive device. The rotating shaft is horizontally arranged on the first lifting seat, the swinging seat is connected to the rotating shaft, and a linear sliding pair is connected between the swinging seat and the support frame. The linear sliding pair includes a transverse slide rail and a slider. The transverse slide rail is arranged parallel to the rotating shaft. The support frame is transmission-connected with a transverse driving device, and the transverse driving device is installed and connected on the first lifting seat.

[0016] For another example, the first lifting seat is in transmission connection with the lifting drive device, the lifting drive device is connected to the second lifting seat, and the second lifting seat is in transmission connection with the floating drive device.

[0017] In addition, the first lifting seat is connected to the vertical guide rail, and the second lifting seat is connected to the vertical guide rail.

[0018] For example, the floating drive device includes a floating clutch drive cylinder; the lifting drive device includes a lifting drive motor and a screw nut mechanism, and the lifting drive motor is transmission-connected to the screw nut mechanism; the transverse drive device includes a transverse drive motor, a transverse screw and a drive nut, the drive nut is fixedly arranged on the support frame, the transverse screw is transmission-connected to the drive nut, and the transverse drive motor is transmission-connected to the transverse screw; the rotating shaft adopts a pivot shaft, a swing bearing is provided between the swing seat and the pivot shaft, the pivot shaft is also connected to a mounting frame, the transverse drive motor is arranged on the mounting frame, and the transverse screw is concentrically arranged with the pivot shaft; the support frame includes an axial transmission plate, and the drive nut is connected to the axial transmission plate.

[0019] In addition, a spring pre-tightening device is provided between the first lifting seat and the swing seat.

[0020] For example, the spring preload device includes an axial bolt, a preload nut and a preload spring. The axial bolt is connected to the first lifting seat. The swing seat is provided with a through hole. The axial bolt passes through the through hole and is screwed with the preload nut. The through hole leaves a gap for the axial bolt to swing. The preload spring is sleeved on the axial bolt, and the preload spring is located between the preload nut and the swing seat; the swing seat is provided with a spring rest bushing, which is arranged in the through hole, and the preload spring is located between the preload nut and the spring rest bushing of the swing seat; the spring rest bushing has a through hole for the axial bolt to pass through, and the axial bolt swing gap is set between the through hole and the axial bolt; a spring pressure cover is arranged between the preload nut and the preload spring.

[0021] The beneficial effect of the present invention is that the roller shaft of the plate roller in its plate roller transmission device does not need to be directly connected to the drive motor in the form of a whole through shaft. The roller shaft of the plate roller can be independently disassembled and assembled, and the disassembly and assembly is relatively more convenient and more efficient. The roller shaft of the plate roller is clamped and released by the roller shaft clamping mouth for disassembly and assembly, and the clamping and opening of the roller shaft clamping mouth can be acted on the clamping claw unit by operating the clamping tension transmission body. It is practical and convenient, and it is more convenient for the replacement and maintenance of the roller shaft of the plate roller. It is more advantageous for the use scenario of the plate roller with an integrated structure of the drum and the roller shaft.

[0022] In the plate roller support device, a first lift is connected to a second lift. One of the first and second lifts moves up and down with a large stroke, while the other moves up and down with a small stroke. This is more practical, and the support frame rises and falls with them, making the lifting operation more efficient. When the plate roller needs to be released from pressure, it only needs to float upward with a small stroke to separate it from the underlying structure (anilox roller, plate roller, etc.). When it needs to be pressed, it only needs to float downward with a small stroke to press it together with the underlying structure for printing. The large up and down movement allows for greater space when assembling and replacing the plate roller, facilitating operation. Furthermore, the support frame for mounting the plate roller can also be driven by a transverse drive device to move laterally (i.e., along the axial direction of the rotating shaft) on a swinging frame for color registration, resulting in a more compact structure. Furthermore, the mounting frame, transverse drive motor, etc. can be supported and connected to the first lift by a pivot shaft (i.e., the rotating shaft), and the swinging frame can be supported and swung by the rotating shaft (i.e., the pivot shaft). The swinging frame supports the plate roller assembly (plate roller transmission device), preventing excessive load on the swinging frame. Therefore, the present invention offers substantial advantages and improvements over the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following describes the details and working principles of the implementation manner and embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a side structural schematic diagram of the plate roller transmission device in the invention.

[0025] Figure 2 for Figure 1 A cross-sectional view of the shift fork arm and a schematic diagram after the shift fork arm swings.

[0026] Figure 3 for Figure 2 A magnified view of center A, with the rollers hidden.

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the front end of the rotating spindle, in which the clamping adjustment sleeve is in a disassembled state.

[0028] Figure 5 It is a structural schematic diagram of the plate roller supporting device in the present invention.

[0029] Figure 6 for Figure 5 Left view of .

[0030] Figure 7 for Figure 5 Middle AA section view.

[0031] Figure 8 for Figure 7 Magnified view of center I.

[0032] Figure 9 for Figure 5 Stereoscopic image.

[0033] Figure 10 for Figure 9 Schematic diagram of the structure from another angle.

[0034] Figure 11 for Figure 10 Schematic diagram of the structure from another angle.

[0035] In the figure: 20, first lifting seat; 21, second lifting seat; 22, rotating shaft; 23, swing seat; 24, support frame; 25, floating drive device; 26, lifting drive device; 27, linear sliding pair; 28, horizontal slide rail; 29, slider; 30, transverse drive device; 31, vertical guide rail; 32, vertical guide rail; 33, floating clutch drive cylinder; 34, lifting drive motor; 35, screw rod and nut mechanism; 36, axial forward limit travel switch ; 37. Axial rearward movement limit stroke switch; 38. Switch matching part; 39. Transverse movement drive motor; 40. Transverse screw rod; 41. Drive nut; 42. Swing bearing; 43. Mounting frame; 44. Axial movement transmission plate; 45. Spring preload device; 46. Axial bolt; 47. Preload nut; 48. Preload spring; 49. Spring support bushing; 50. Through hole; 51. Through hole; 52. Spring pressure cover; 53. Frame; 55. Axial bolt swing clearance.

[0036] 24. Support frame; 61. Rotating main shaft; 62. Clamping and tensioning transmission body; 63. Rotating support component; 64. Roller clamping mouth; 65. Clamping claw unit; 66. Separation gap; 67. Clamping transmission outer surface; 68. Clamping transmission inner surface; 69. Roller support part; 70. Roller pressure cover; 71. Roller bearing; 72. Shaft head; 73. Mounting hole; 74. Rotating drive motor; 75. Transmission shaft; 76. Coupling; 77. Clamping claw unit; 78. Separation gap; 79. Clamping adjustment sleeve; 80. Clamping adjustment nut; 81. Axial movement transmission device; 82. Shift fork arm; 83. Transmission component; 84. Groove; 85. Shift fork transmission member; 86. Spiral groove; 87. Hollow cavity; 89. Support core shaft; 90. Movable gap; 91. Center hole; 92. Articulated shaft; 93. Roller; 94. Notch. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the implementation of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] Referring to the accompanying drawings, the printing mechanism of the printing press in the embodiment of this embodiment includes a plate roller support device and a plate roller transmission device. The plate roller support device includes a support frame 24, and the plate roller transmission device is installed on the support frame 24. The plate roller transmission device can move with the support frame 24.

[0039] In the printing mechanism of the printing press, the plate roller transmission device includes a rotating main shaft 61 and a clamping and tightening transmission body 62. The rotating main shaft 61 is arranged on the support frame 24 of the plate roller support device. A rotating support component 63 (such as a bearing, etc.) is provided between the rotating main shaft 61 and the support frame 24. The rotating support component 63 supports the rotating main shaft 61 on the support frame 24 for rotation.

[0040] The front end of the rotating main shaft 61 is provided with a roller clamping opening 64 (indicated by a dotted box in the figure), that is, the roller shaft 93 of the plate roller can be inserted into the roller clamping opening 64 and clamped.

[0041] The periphery of the roller clamping opening 64 is the clamping claw unit 65, and the clamping claw units 65 are provided with separation gaps 66. The clamping claw units 65 are enclosed on the inner side to form the roller clamping opening 64, that is, the periphery of the roller clamping opening 64 is divided into individual clamping claw units 65 by the separation gaps 66. When the clamping claw units 65 are clamped inward, they cooperate to clamp the roller shaft 93 of the plate roller, and when they are released, the roller shaft 93 is released.

[0042] The outer side surface of the clamping claw unit 65 is provided with a clamping transmission outer surface 67 so that an external force acts on the clamping transmission outer surface 67 to clamp the clamping claw unit 65 inward.

[0043] The clamping tension transmission body 62 has a clamping transmission inner surface 68, which is arranged on the outside of the clamping transmission outer surface 67. The clamping transmission inner surface 68 and the clamping transmission outer surface 67 are arranged in a transmission-coordinated manner, that is, when the clamping tension transmission body 62 moves axially, the clamping transmission inner surface 68 will act on the clamping transmission outer surface 67 to clamp the clamping claw unit 65 inwardly. When the clamping tension transmission body 62 retreats axially, the clamping transmission inner surface 68 will retreat to a position to enable the clamping claw unit 65 to open and return outward.

[0044] The working principle is as follows: the roller shaft 93 of the plate roller can be installed in the roller shaft clamping opening 64, and the roller shaft clamping opening 64 at the front end of the rotating main shaft 61 on the support frame 24 cooperates to clamp and release the roller shaft 93, so that the roller shaft 93 of the plate roller can be connected to the rotating main shaft 61, which not only cooperates to realize the installation of the roller shaft 93 of the plate roller, but also drives the roller shaft 93 of the plate roller to rotate; during assembly, the roller shaft 93 of the plate roller is inserted into the roller shaft clamping opening 64, and then the clamping and tensioning transmission body 62 is axially moved outside the rotating main shaft 61, and the clamping transmission inner surface 68 acts on the clamping transmission outer surface 67 to clamp the clamping claw unit 65 inwardly, so that the roller shaft clamping opening 64 clamps the inserted roller shaft 93; during disassembly, the clamping and tensioning transmission body 62 retracts axially, the clamping claw unit 65 opens outward, and the roller shaft clamping opening 64 is loosened (i.e., opened) to release the roller shaft 93 of the plate roller.

[0045] In the plate roller transmission device of the printing press, the roller shaft 93 of the plate roller does not need to adopt the structure of a whole through shaft to be directly connected to the drive motor. The roller shaft of the plate roller can be disassembled and assembled independently, and the disassembly and assembly is relatively more convenient and more efficient. The roller shaft 93 of the plate roller is clamped and released by the roller shaft clamping mouth 64 for disassembly and assembly, and the clamping and opening of the roller shaft clamping mouth 64 is achieved by operating the clamping tension transmission body 62 to act on the clamping claw unit 65. It is practical and convenient, and it is more convenient to replace and maintain the roller shaft 93 of the plate roller, and it is more advantageous for the use scenario of the plate roller with an integrated structure of the drum and the roller shaft.

[0046] The following optimization or further explanation may be performed based on the above embodiments.

[0047] For example, a roller supporting portion 69 is further provided at the front end of the support frame 24, and a roller pressure cover 70 is further provided above the roller supporting portion 69. The roller pressure cover 70 (usually connected with a fastener 97) is installed on the support frame 24; an installation position for assembling the roller bearing 71 is reserved between the roller pressure cover 70 and the roller supporting portion 69, and the roller bearing 71 on the roller shaft 93 of the plate roller will be placed on the roller supporting portion 69, and the roller supporting portion 69 cooperates to support the roller shaft (and the roller bearing 71), and the roller pressure cover 70 cooperates to press the roller bearing 71, and cooperates to stably support the roller shaft 93 (and the roller bearing 71), thereby avoiding the problem of excessive load when the roller shaft 93 of the entire plate roller is only connected and fixed by the roller clamping opening 64 of the rotating main shaft 61. The roller support effect is better, and it can be used when the roller shaft is in a cantilevered structure; the shaft head 72 of the roller shaft is assembled in the roller clamping opening 64.

[0048] The support frame 24 has a mounting hole 73 to form a support sleeve structure, and the rotating spindle 61 and the clamping tension transmission body 62 are arranged in the mounting hole 73, wherein the rotating spindle 61 is axially passed through the mounting hole 73, and the rotating support component 63 is arranged between the rotating spindle 61 and the mounting hole 73, and the rotating support component 63 cooperates to support the rotating spindle 61 to rotate on the mounting hole 73 of the support frame 24; the rotating support component 63 (such as a bearing) is installed in the mounting hole 73 and is installed by a gasket 95 and an end cover 96.

[0049] The support frame 24 may also be provided with a rotary drive motor 74, which is in transmission connection with the rotary main shaft 61. The rotary drive motor 74 drives the rotary main shaft 61 to rotate, and the rotary main shaft 61 drives the assembled plate roller to rotate synchronously. There are many transmission connection structures between the rotary main shaft 61 and the rotary drive motor 74. For example, the rotary drive motor 74 is in transmission connection with a transmission shaft 75, and a coupling 76 is provided between the transmission shaft 75 and the rotary main shaft 61. This facilitates assembly and adaptation to different specifications, and has a relatively compact structure. The rotary drive motor 74 can be equipped with a reducer for transmission connection.

[0050] For example, the clamping and tensioning transmission body 62 utilizes a clamping sleeve, with the clamping transmission inner surface 68 located within the inner ring of the clamping sleeve. The clamping sleeve is positioned over the rotating spindle 61. The clamping and tensioning transmission body 62 has a full (one-circle) clamping transmission inner surface 68. This allows each clamping claw unit 65 to be evenly stressed, resulting in better synchronization between clamping and release, more uniform clamping force, and improved clamping effectiveness. The clamping claw units 65 are arranged circumferentially (and can be evenly arranged) around the rotating spindle 61. The roller clamping opening 64 retracts to clamp (i.e., clamp) the plate roller, ensuring more uniform force distribution and a relatively more balanced and stable transmission.

[0051] It can also be further optimized by providing a clamping claw unit 77 at the front or rear of the clamping tension transmission body 62, and providing a separation gap 78 between the clamping claw units 77, that is, the separation gap 78 separates the front or rear of the clamping tension transmission body 62 into individual clamping claw units 77 along the circumferential direction, and each clamping claw unit 77 will form a circle, wherein the clamping transmission inner surface 68 is located on the inner side of the clamping claw unit 77; the clamping tension transmission body 62 is also connected to a clamping adjustment sleeve 79, which will be sleeved on the outer ring of the clamping claw unit 77, and a clamping adjustment screw is also connected between the clamping adjustment sleeve 79 and the clamping tension transmission body 62. Nut 80 adjusts the relative axial position of clamping adjustment sleeve 79 by tightening adjustment nut 80, thereby adjusting the tightness of clamping jaw units 77 (i.e., the diameter of the opening enclosed by each clamping jaw unit 77—the inner ring size, which also changes the size of the gap 78). This in turn adjusts the tightness (inner ring size) of the clamping transmission inner surface 68 of the clamping tension transmission body 62. This allows for varying clamping forces within the same axial travel of the clamping tension transmission body 62 (ultimately feeding back into the different degrees of release and clamping of the roller clamping opening 64 and the clamping jaw units 65), thus accommodating the needs of rollers of varying diameters. The inner surface of the clamping adjustment sleeve 79 and the outer surface of the clamping tension transmission body 62 can be tapered (e.g., inner and outer tapered) to achieve adjustable clamping tension.

[0052] Alternatively, the clamping tensioning transmission body 62 can be connected to an axially movable transmission device 81, with the axially movable transmission device 81 cooperating to drive the clamping tensioning transmission body 62 to axially shift positions, thereby making the axial position of the clamping tensioning transmission body 62 adjustable. Through the axial shifting position of the clamping tensioning transmission body 62, its clamping transmission inner surface 68 axially moves and acts on the clamping transmission outer surface 67 of the rotating main shaft 61, causing the clamping claw unit 65 to clamp inward. When the release roller needs to be released, the clamping tensioning transmission body 62 axially retracts. As the clamping tensioning transmission body 62 retracts, the clamping transmission inner surface 68 retreats, causing the clamping claw unit 65 to open and return to its original position.

[0053] There are many ways for the axially moving transmission device 81 to drive the clamping tensioning transmission body 62. For example, the axially moving transmission device 81 includes a fork arm 82, which is hinged on the support frame 24 (as shown in the figure, a swinging structure is formed on the support frame 24 through the hinge shaft 92 to drive the clamping tensioning transmission body 62 to move axially) or the fork arm 82 moves axially (moves in an axial sliding manner, such as a slide rail cooperation manner, etc.) and is arranged on the support frame 24. A transmission component 83 is provided on the fork arm 82, and a groove 84 is provided on the clamping tensioning transmission body 62. The transmission component 83 is configured in the groove 84, and the fork arm 82 cooperates with the transmission component 83 in the groove 84 to drive the clamping tensioning transmission body 62 to move axially and switch positions. For example, the groove 84 adopts an annular groove, and the annular groove structure enables the clamping tensioning transmission body 62 to rotate together with the rotating main shaft 61 and to cooperate smoothly with the transmission component 83 for transmission; the transmission component 83 adopts a roller, and the roller rotates relatively in the annular groove more smoothly; the clamping tensioning transmission body 62 is connected to the rotating main shaft 61. If the clamping tensioning transmission body 62 is sleeved on the outside of the rotating main shaft 61, the clamping tensioning transmission body 62 can be supported by the rotating main shaft 61 and can rotate together with the rotating main shaft 61. The transmission component 83 on the fork arm 82 can also cooperate in the annular groove to drive the clamping tensioning transmission body 62 to move axially. The internal structure is relatively compact. Generally, notches 94 are provided on the left and right sides of the support frame 24 (such as its support sleeve structure) for the transmission component 83 of the fork arm 82 to pass through and extend into the groove 84. In addition, the axial movement transmission device 81 also includes a fork transmission member 85, which is in transmission connection with the fork arm 82, and the fork transmission member 85 drives the fork arm 82 to swing or move axially on the support frame 24. The fork transmission member 85 includes a fork power source (such as a cylinder or a motor, etc.) or a fork handle with a locking unit (for locking its relative position).

[0054] For example, the clamping transmission inner surface 68 can be an inner conical surface, and / or the clamping transmission outer surface 67 can be an outer conical surface, forming a tapered mating transmission between the clamping transmission inner surface 68 and the clamping transmission outer surface 67. The inner and outer conical surfaces can be circular conical surfaces, frustum conical surfaces, or conical planes, such as cones, frustums, or prisms. Using circular conical surfaces or frustum conical surfaces for the inner and / or outer conical surfaces facilitates fabrication and ensures smoother operation. Of course, the clamping transmission inner surface 68 and the clamping transmission outer surface 67 can also utilize mating surfaces of other shapes.

[0055] In addition, the rotating spindle 61 is further optimized. A spiral groove 86 is provided on the rotating spindle 61. The spiral groove 86 takes the central axis (i.e., the axis centerline) of the rotating spindle 61 as its centerline; a hollow cavity 87 of the rotating spindle 61 is provided at the center of the spiral groove 86. The hollow cavity 87 is communicated with the outer side of the rotating spindle 61 through the spiral groove 86, forming a section (corresponding to the section of the spiral groove 86) of a buffer elastic structure on the rotating spindle 61 for micro-swinging the position, thereby realizing fine-tuning of the swing, which can solve the problem of the roller shaft of the plate roller and the rotating spindle 61 being out of center. Even if there is a certain deviation (concentricity, coaxiality), it can be compensated by the buffer elastic structure, so that the roller shaft and the rotating spindle 61 can be smoothly matched and transmitted, and the influence of vibration can be reduced to ensure the printing effect. Further optimization is made by installing a support spindle 89 within the hollow cavity 87 of the rotating spindle 61. A clearance 90 is provided between the support spindle 89 and the rotating spindle 61. The clearance 90 provides swing space for the buffer elastic structure and limits the swing range. The clearance 90 not only allows the rotating spindle 61 to swing slightly and sway as it passes through the section of the spiral groove 86, but also provides internal support and protection by the support spindle 89 to prevent the rotating spindle 61 from breaking at the spiral groove 86. The size of the clearance 90 can limit the range of swing and slight swing and can be set as needed. For example, a center hole 91 is provided at the central axis of the rotating spindle 61. The rear end of the support spindle 89 is fixedly connected to the rotating spindle 61. The center hole 91 includes the hollow cavity 87 (i.e., the hollow cavity 87 is a portion of the center hole 91, and the center hole 91 can be an axially arranged through-hole). The support spindle 89 is inserted into the center hole 91. The rear end of the support spindle 89 can be fixedly connected to the rear end of the rotating spindle 61.

[0056] In the printing mechanism of a printing press, the plate roller support device also includes a first lifting base 20, a second lifting base 21, a rotating shaft 22, and a swing base 23. A support frame 24 (including a support sleeve) is used to mount the plate roller transmission device. As the support frame is raised and lowered, the plate roller transmission device moves with it.

[0057] The first lift base 20 is connected to the second lift base 21, allowing the first lift base 20 to be lifted and lowered on the second lift base 21. One of the first lift base 20 and the second lift base 21 is connected to a floating drive 25 for vertical floating and lifting; the other of the first lift base 20 and the second lift base 21 is connected to a lifting drive 26 for vertical movement (e.g., for a large travel). Both the first and second lift bases can be constructed from multiple connected panels.

[0058] The rotating shaft 22 is horizontally disposed on the first lifting base 20 , and the rotating shaft 22 will move up and down along with the first lifting base 20 .

[0059] The swing base 23 is connected to the rotating shaft 22 and supported by the rotating shaft 22 for swinging movement. The swing base 23 swings about the rotating shaft 22. Furthermore, a linear sliding pair 27 is connected between the swing base 23 and the support frame 24. The linear sliding pair 27 comprises a transverse slide 28 and a slider 29. The slider 29 slides axially with the transverse slide 28, allowing the linear sliding pair 27 to slide stably in the axial direction. The transverse slide 28 is arranged parallel to the horizontally disposed rotating shaft 22. The linear sliding pair 27 and the support frame 24 move (swing and rise) along with the swing base 23. The swing base 23 swings about the rotating shaft 22 and rises and falls with the first lifting frame 20. The support frame 24 is connected to a transverse drive 30, which drives the support base 24 for axial movement. The support base 24 slides axially on the swing base 23, guided by the linear sliding pair 27. The transverse drive 30 is mounted on the first lifting frame 20 and rises and falls with the first lifting frame 20. The swing seat 23 is connected to a transverse slide rail 28 or a slider 29 in the linear sliding pair 27 , and the other of the transverse slide rail 28 or the slider 29 is connected to the support frame 24 .

[0060] The operating principle and effect of the plate roller support device of this flexographic printing mechanism are as follows: a first lifting platform 20 is connected to a second lifting platform 21. One of the first and second lifting platforms 20 and 21 performs a large-stroke up-and-down movement, while the other performs a small-stroke up-and-down movement. This is more practical, and the lifting and lowering operation is more rational and efficient. When the plate roller needs to be released from pressure, it only needs to float upward (rise) by a small stroke to separate from the underlying structure (anilox roller, printing roller, etc.). When it needs to be pressed, it only needs to float downward (lower) by a small stroke to pressurize the underlying structure for printing. The large-stroke up-and-down movement and lifting provide a larger space for assembling and replacing the plate roller, facilitating operation. Furthermore, the support frame 24 for plate roller mounting can also be driven by a transverse drive device 30 to move laterally (i.e., in the axial direction of the rotating shaft 22 and the plate roller) on the swinging platform 23 for color registration, resulting in a more compact structure. Therefore, the present invention offers substantial advantages and improvements over the prior art.

[0061] The support frame 24 for mounting the plate roller is driven by a transverse drive 30 and moves axially on a linear slide pair 27, providing for color registration and a more compact structure. The swinging seat 23 is mounted on the rotating shaft 22 (e.g., a pivot shaft). The swinging seat 23 swings about the axis of the rotating shaft 22 and rises and falls with the first lifting seat 20. The support frame 24 swings and rises slightly synchronously with the swinging seat 23. The swinging of the support frame 24 automatically aligns the plate roller axis. The swinging seat 23 only carries the plate roller assembly, preventing excessive load on the swinging seat 23 on the rotating shaft 22.

[0062] The following optimization or further explanation may be performed based on the above embodiments.

[0063] For example, the first lifting platform 20 is in transmission connection with the lifting drive device 26, which is connected to the second lifting platform 21, which is in transmission connection with the floating drive device 25. That is, when the first lifting platform 20 is moved up and down, the first lifting platform 20 is mounted on the second lifting platform 21 and is lifted and lowered, and the second lifting platform 21 is lifted and lowered, the first lifting platform 20 connected to the second lifting platform 21 will also be lifted and lowered.

[0064] Further optimization can be performed so that the first lifting platform 20 is connected to a vertical guide rail, and the second lifting platform 21 is connected to a vertical guide rail to ensure stable vertical lifting. The first and second lifting platforms 20, 21 can share a vertical guide rail, or each can be equipped with a separate vertical guide rail. For example, the second lifting platform 21 is connected to the frame 53 via a vertical guide rail 32, and the first lifting platform 20 is connected to the second lifting platform 21 via a vertical guide rail 31.

[0065] For example, the floating drive device 25 includes a floating clutch drive cylinder 33, the pressure of which can be easily adjusted. Furthermore, the lifting drive device 26 includes a lifting drive motor 34 and a screw-nut mechanism 35 (including a screw nut and a screw 54), with the lifting drive motor 34 being transmission-connected to the screw-nut mechanism 35. Of course, there are many possible configurations for the floating drive device 25 and the lifting drive device 26, and other configurations and transmission structures may also be employed.

[0066] In addition, the first lifting seat 20 is also provided with an axial forward limit stroke switch 36 and an axial backward limit stroke switch 37, and the support frame 24 has a switch matching portion 38. When the support frame 24 moves axially forward and axially backward on the swing seat 23, the switch matching portion 38 moves axially (i.e., moves laterally) with the support frame 24. The switch matching portion 38 is arranged between the axial forward limit stroke switch 36 and the axial backward limit stroke switch 37. The switch matching portion 38 cooperates between the axial forward limit stroke switch 36 and the axial backward limit stroke switch 37 to control the front and rear end point positions of the axial movement of the support frame 24; usually, the axial forward limit stroke switch 36 and the axial backward limit stroke switch 37 are respectively connected to the transverse movement drive device 30 (they can be connected through a PLC or a controller, etc.).

[0067] For example, the transverse drive device 30 includes a transverse drive motor 39, a transverse screw rod 40 and a drive nut 41. The drive nut 41 is fixedly arranged on the support frame 24. The drive nut 41 moves synchronously with the support frame 24. The transverse screw rod 40 is connected to the drive nut 41 for transmission. The transverse drive motor 39 is connected to the transverse screw rod 40 for transmission. The transverse drive motor 39 drives the transverse screw rod 40 to rotate. The transverse screw rod 40 causes the drive nut 41 to move axially. The drive nut 41 will drive the support frame 24 to move back and forth axially along the transverse slide rail 28. Among them, the rotating shaft 22 can adopt a pivot shaft, and a swing bearing 42 (such as a copper sleeve, etc.) is provided between the swing seat 23 and the pivot shaft (i.e. the rotating shaft 22). The swing bearing 42 enables the swing seat 23 to swing stably and smoothly around the pivot shaft (i.e. the rotating shaft 22); the pivot shaft is also connected to a mounting frame 43 (which can be composed of a mounting plate, etc.), which can be fixedly connected by pin connection, etc.; the mounting frame 43 can be provided for the connection support of the transverse driving motor 39, and the transverse screw rod 40 is concentrically arranged with the pivot shaft (i.e. the coaxial axis arrangement), and the support frame 24 can swing with the swing seat 23 (the support frame 24 rotates around the driving transverse screw rod 40, and the transverse screw rod 40 will rotate in the driving nut 41), so that the mounting frame 43, the transverse driving motor 39, etc. are supported and connected to the first lifting seat 20 by the pivot shaft, and the swing seat 23 only carries the plate roller assembly to avoid excessive load on the swing seat 23.

[0068] In addition, the support frame 24 includes an axial transmission plate 44, the driving nut 41 is connected to the axial transmission plate 44, the switch matching part 38 can be set on the axial transmission plate 44, the axial forward limit travel switch 36 and the axial backward limit travel switch 37 are set on the mounting frame 43, the switch matching part 38 is set between the axial forward limit travel switch 36 and the axial backward limit travel switch 37, the axial forward limit travel switch 36 and the axial backward limit travel switch 37 are respectively connected to the transverse drive motor 39.

[0069] It can be further optimized by providing a spring pre-tightening device 45 between the first lifting seat 20 and the swing seat 23. The spring pre-tightening device 45 can press the swing seat 23 against the first lifting seat 20, so that the swing seat 23 swings more stably.

[0070] For example, the spring preload device 45 includes an axial bolt 46, a preload nut 47 and a preload spring 48. The axial bolt 46 is connected to the first lifting seat 20. A through hole 50 is provided on the swing seat 23. The axial bolt 46 passes through the through hole 50 and is screwed with the preload nut 47. The through hole 50 leaves an axial bolt swing gap 55 so that the axial bolt 46 and the swing seat 23 can swing and displace relative to each other, ensuring that the swing seat 23 swings smoothly and avoids the swing seat 23 swinging and the axial bolt 46 from causing the swing seat 23 to swing. Interference ensures the accuracy of automatic centering of the swing seat 23 when it swings. The swing angle of the swing seat 23 is very small and is used for fine-tuning. The pre-tightening spring 48 is sleeved on the axial bolt 46. The pre-tightening spring 48 is located between the pre-tightening nut 47 and the swing seat 23. The pre-tightening spring 48 is used to press the swing seat 23 against the first lifting seat 20. The pre-tightening nut 47 adjusts the elastic force (pre-tightening force) of the pre-tightening spring 48 by rotating on the axial bolt 46 to adjust the pressure of the swing seat 23 and the first lifting seat 20. Further optimization is provided on the swing seat 23 with a spring support bushing 49. The spring support bushing 49 is set in the through hole 50. The pre-tightening spring 48 is located between the pre-tightening nut 47 and the spring support bushing 49 of the swing seat 23 for assembly. The pre-tightening spring 48 runs more smoothly. The spring support bushing 49 can be used as a part of the through hole 50, which reduces the processing and manufacturing requirements of the through hole 50. The spring support bushing 49 can also protect the swing seat 23. Once a fault occurs, only the spring support bushing needs to be replaced. The bushing 49 does not require replacement of the swing seat 23, thereby improving maintenance productivity and reducing maintenance costs; wherein, the spring supporting bushing 49 has a through hole 51, the through hole 51 is for the axial bolt 46 to pass through, and the axial bolt swing gap 55 is set between the through hole 51 and the axial bolt 46; a spring pressure cover 52 is set between the pre-tightening nut 47 and the pre-tightening spring 48, and the pre-tightening nut 47 adjusts the pre-tightening spring 48 more conveniently and stably, and one end of the pre-tightening spring 48 can be pressed and protected by the spring pressure cover 52.

Claims

1. A printing mechanism of a printing press, comprising a plate roller supporting device and a plate roller transmission device, wherein the plate roller supporting device comprises a support frame (24), and the plate roller transmission device is mounted on the support frame (24), and is characterized in that: The plate roller transmission device includes a rotating main shaft (61) and a clamping and loosening transmission body (62). The rotating main shaft (61) is arranged on a support frame (24) of the plate roller transmission device. A rotating support component (63) is provided between the rotating main shaft (61) and the support frame (24). The front end of the rotating main shaft (61) is provided with a roller clamping opening (64), the periphery of the roller clamping opening (64) is a clamping claw unit (65), and the clamping claw units (65) are provided with separation gaps (66) between each other. The clamping claw units (65) are enclosed on the inner side to form the roller clamping opening (64), and the outer side surface of the clamping claw unit (65) is provided with a clamping transmission outer surface (67); The clamping transmission body (62) has a clamping transmission inner surface (68), which is arranged outside the clamping transmission outer surface (67). The clamping transmission inner surface (68) and the clamping transmission outer surface (67) are arranged in a transmission-coordinated manner.

2. The printing mechanism of a printing press according to claim 1, wherein: The front end of the support frame (24) is also provided with a roller bearing portion (69), and a roller pressure cover (70) is provided above the roller bearing portion (69). The roller pressure cover (70) is installed on the support frame (24); an installation position for assembling a roller bearing (71) is reserved between the roller pressure cover (70) and the roller bearing portion (69); the shaft head (72) of the roller is assembled in the roller clamping opening (64); The support frame (24) has a mounting hole (73), the rotating main shaft (61) and the clamping and tightening transmission body (62) are arranged in the mounting hole (73), the rotating main shaft (61) is axially inserted into the mounting hole (73), and the rotating support component (63) is arranged between the rotating main shaft (61) and the mounting hole (73); The rotary drive motor (74) is connected to a transmission shaft (75), and a coupling (76) is provided between the transmission shaft (75) and the rotating main shaft (61); A rotation drive motor (74) is also provided on the support frame (24), and the rotation drive motor (74) is in transmission connection with the rotation main shaft (61).

3. The printing mechanism of a printing press according to claim 1, wherein: The clamping and tightening transmission body (62) adopts a clamping sleeve, the clamping transmission inner surface (68) is located on the inner ring of the clamping sleeve, and the clamping sleeve is sleeved outside the rotating main shaft (61); the clamping claw units (65) are arranged along the circumferential direction on the rotating main shaft (61); The inner surface (68) of the clamp transmission adopts an inner conical surface, and / or the outer surface (67) of the clamp transmission adopts an outer conical surface; The inner conical surface and / or the outer conical surface adopts a conical surface or a frustum conical surface.

4. The printing mechanism of a printing press according to claim 1, wherein: The clamping claw units (65) are evenly arranged in the circumferential direction; The front or rear portion of the clamping and tightening transmission body (62) has a clamping claw unit (77), and the clamping claw units (77) are separated from each other by gaps (78). The inner surface (68) of the clamping transmission is located on the inner side of the clamping claw unit (77). A clamping adjustment sleeve (79) is connected to the outside of the clamping and tightening transmission body (62), and a clamping adjustment nut (80) is connected between the clamping and tightening transmission body (62). The clamping and tightening transmission body (62) is in transmission connection with the axial movement transmission device (81); The axially movable transmission device (81) includes a shift fork arm (82), the shift fork arm (82) is hinged on the support frame (24) or the shift fork arm (82) is axially movable and arranged on the support frame (24), the shift fork arm (82) is provided with a transmission component (83), the clamping and tightening transmission body (62) is provided with a groove (84), and the transmission component (83) is arranged in the groove (84). The groove (84) is an annular groove, the transmission component (83) is a roller, and the clamping and tightening transmission body (62) is connected to the rotating main shaft (61); The axial movement transmission device (81) further includes a shift fork transmission member (85), the shift fork transmission member (85) is transmission-connected to the shift fork arm (82), and the shift fork transmission member (85) includes a shift fork power source or a shift fork handle with a locking unit.

5. The printing mechanism of a printing press according to claim 1, wherein: A spiral groove (86) is provided on the rotating main shaft (61), and the spiral groove (86) takes the central axis of the rotating main shaft (61) as the center line; a hollow cavity (87) of the rotating main shaft (61) is provided at the center of the spiral groove (86), and the hollow cavity (87) is communicated with the outer side of the rotating main shaft (61) through the spiral groove (86).

6. The printing mechanism of a printing press according to claim 1, wherein: A supporting core shaft (89) is provided in the hollow cavity (87) of the rotating main shaft (61), and a movable gap (90) is left between the supporting core shaft (89) and the rotating main shaft (61); A center hole (91) is provided at the center axis of the rotating main shaft (61), the rear end of the supporting core shaft (89) is fixedly connected to the rotating main shaft (61), the center hole (91) includes the hollow cavity (87), and the supporting core shaft (89) is passed through the center hole (91).

7. The printing mechanism of a printing press according to claim 1, wherein: Support frame lifting setting; The plate roller supporting device further includes a first lifting seat (20), a second lifting seat (21), a rotating shaft (22) and a swing seat (23). The first lifting seat (20) is connected to the second lifting seat (21), one of the first lifting seat (20) and the second lifting seat (21) is connected to the floating drive device (25), and the other is connected to the lifting drive device (26). The rotating shaft (22) is horizontally arranged on the first lifting seat (20). The swing seat (23) is connected to the rotating shaft (22). A linear sliding pair (27) is connected between the swing seat (23) and the support frame (24). The linear sliding pair (27) includes a transverse slide rail (28) and a slider (29). The transverse slide rail is arranged parallel to the rotating shaft (22). The support frame (24) is connected to the transverse driving device (30). The transverse driving device (30) is installed and connected to the first lifting seat (20).

8. The printing mechanism of a printing press according to claim 7, wherein: The first lifting seat (20) is in transmission connection with the lifting drive device (26), the lifting drive device (26) is connected to the second lifting seat (21), and the second lifting seat (21) is in transmission connection with the floating drive device (25).

9. The printing mechanism of a printing press according to claim 7, wherein: The first lifting seat (20) is connected to the vertical guide rail, and the second lifting seat (21) is connected to the vertical guide rail; The floating drive device (25) includes a floating clutch drive cylinder (33); The lifting drive device (26) includes a lifting drive motor (34) and a screw-nut mechanism (35), and the lifting drive motor (34) is transmission-connected to the screw-nut mechanism (35); The transverse driving device (30) includes a transverse driving motor (39), a transverse screw rod (40), and a driving nut (41), wherein the driving nut (41) is fixedly arranged on the support frame (24), the transverse screw rod (40) and the driving nut (41) are connected in a transmission manner, and the transverse driving motor (39) is connected in a transmission manner to the transverse screw rod (40); The rotating shaft (22) adopts a pivot shaft, a swing bearing (42) is provided between the swing seat (23) and the pivot shaft, and the pivot shaft is also connected to a mounting frame (43). The transverse drive motor (39) is arranged on the mounting frame (43), and the transverse screw rod (40) is arranged concentrically with the pivot shaft; The support frame (24) includes an axial shift transmission plate (44), and the driving nut (41) is connected to the axial shift transmission plate (44).

10. The printing mechanism of a printing press according to claim 7, wherein: A spring pre-tightening device (45) is further provided between the first lifting seat (20) and the swing seat (23); The spring preload device (45) includes an axial bolt (46), a preload nut (47) and a preload spring (48). The axial bolt (46) is connected to the first lifting seat (20). A through hole (50) is provided on the swing seat (23). The axial bolt (46) passes through the through hole (50) and is screwed to the preload nut (47). The through hole (50) leaves an axial bolt shaking gap (55). The preload spring (48) is sleeved on the axial bolt (46). The preload spring (48) is located between the preload nut (47) and the swing seat (23). A spring abutment bushing (49) is provided on the swing seat (23), the spring abutment bushing (49) is arranged in the through hole (50), and the preload spring (48) is located between the preload nut (47) and the spring abutment bushing (49) of the swing seat (23); The spring supporting bushing (49) has a through hole (51) for the axial bolt (46) to pass through, and an axial bolt shaking gap (55) is set between the through hole (51) and the axial bolt (46); a spring pressure cover (52) is set between the pre-tightening nut (47) and the pre-tightening spring (48).

Images