Printing mechanism of a printing press

Abstract

The present invention relates to a printing mechanism of a printing press, including a plate cylinder support device and a plate cylinder drive device. The rotating main shaft of the plate cylinder drive device is arranged on a support frame. A roller shaft clamping opening is provided at the front end of the rotating main shaft. A separation gap is provided between the clamping claw units around the roller shaft clamping opening. The outer side of the clamping claw unit is provided with a clamping drive outer surface; the clamping tightening and loosening drive body is provided with a clamping drive inner surface, and the clamping drive inner surface is arranged on the outer side of the clamping drive outer surface for drive cooperation. The roller shaft of the plate cylinder 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 cylinder can be independently disassembled and assembled, and the disassembly and assembly are relatively more convenient and efficient. The roller shaft of the plate cylinder is clamped and loosened by the roller shaft clamping opening for disassembly and assembly, and the clamping and opening of the roller shaft clamping opening can be achieved by operating the clamping tightening and loosening drive body on the clamping claw unit, which is practical and convenient, and is more convenient for the replacement and maintenance of the roller shaft of the plate cylinder, and has more advantages in the use scenario of the plate cylinder with an integrated structure of the cylinder and the roller shaft.

Description

Technical Field

[0001] The present invention relates to a printing press, in particular to a printing mechanism. Background Art

[0002] The printing mechanism (such as the flexographic mechanism) in the printing press has a plate roller shaft, which needs to be raised and lowered in the flexographic mechanism for plate changing and clutching (separated when printing is paused, pressed and contacted when printing continues); in addition, the plate roller shaft needs to be moved axially for color registration, so that the patterns on different plate roller shafts can correspond; in addition, the plate roller shaft drops and lands between the anilox roller and the printing roller, and needs to be automatically aligned. At present, in order to realize the above-mentioned operation of the plate roller shaft, its support structure is not reasonable. For example, whether it is changing the plate or stopping the printing for a short time, it needs to be raised and lowered with a large stroke. In addition, its automatic centering and axial movement color registration structure occupy a relatively large space.

[0003] In addition, the printing mechanism (such as flexographic printing mechanism, etc.) has a plate roller for printing, and the circumferential surface of the plate roller is equipped with a printing plate. At present, the plate roller can be a split structure (i.e., a roller shaft and a roller mounted on the roller shaft), or the plate roller is an integrated structure (i.e., the roller shaft and the roller are connected as a whole). In these two types of structures, the roller shaft of the plate roller is a through-shaft structure, and the roller shaft is directly connected to the drive motor transmission, and some mechanical transmission structures are required to be connected, which makes the roller shaft difficult to disassemble and assemble. When repair or maintenance or replacement or specification change is required during use, the entire transmission connection structure between the roller shaft and the drive motor needs to be disassembled and assembled, which is time-consuming and laborious. In addition, the roller shaft of this through-shaft structure usually adopts a structure that can replace and install the printing plate sleeve, so as to avoid frequent disassembly and assembly of the roller shaft, and only the printing plate sleeve needs to be replaced and installed. However, the structure with additional configuration for replacing and installing the printing plate sleeve not only makes the plate roller structure more complicated, but also has many problems such as the deviation of the position between 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 which is more convenient for disassembly and assembly of a roller, and which will subsequently optimize the lifting and lowering operation of the support frame and has a 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 supporting device and a plate roller transmission device, the plate roller supporting device includes a supporting frame, and the plate roller transmission device is installed on the supporting frame, and is characterized in that: the plate roller transmission device includes a rotating spindle and a clamping and loosening transmission body, the rotating spindle is arranged on the supporting frame of the plate roller supporting device, a rotating supporting component is arranged between the rotating spindle and the supporting frame, a roller clamping opening is arranged at the front end of the rotating spindle, the periphery of the roller clamping opening is a clamping claw unit, and the clamping claw units are provided with separation gaps, each clamping claw unit is enclosed on the inner side to form the roller clamping opening, and the outer side surface of the clamping claw unit is provided with a clamping transmission outer surface;

[0006] The clamping transmission body has a clamping transmission inner surface, which is arranged outside the clamping transmission outer surface, and the clamping transmission inner surface and the clamping transmission outer surface are arranged in transmission cooperation.

[0007] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0008] For example, a roller bearing portion is provided at the front end of the support frame, and a roller pressure cover is provided above the roller bearing portion, and the roller pressure cover is installed on the support frame; an installation position for assembling the roller bearing is reserved between the roller pressure cover and the roller bearing portion; the shaft head of the roller is assembled in the roller clamping mouth.

[0009] For example, the support frame has a mounting hole, the rotating spindle and the clamping and tightening transmission body are arranged in the mounting hole, the rotating spindle is axially arranged in the mounting hole, and the rotating support component is arranged between the rotating spindle and the mounting hole. For example, the rotating drive motor is connected to the transmission shaft, and a coupling is arranged between the transmission shaft and the rotating spindle; in addition, the support frame is also provided with a rotating drive motor, and the rotating drive motor is connected to the rotating spindle.

[0010] For another example, the clamping tension transmission body adopts a clamping sleeve, the inner surface of the clamping transmission is located at 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.

[0011] 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 truncated cone surface.

[0012] Among them, the clamping claw units can be evenly arranged in the circumferential direction.

[0013] In addition, the front or rear of the clamping tightness transmission body is provided with a clamping jaw unit, and there is a separation gap between the clamping jaw units. The inner surface of the clamping transmission is located on the inner side of the clamping jaw unit. An adjusting sleeve for clamping is also connected to the outside of the clamping tightness transmission body, and a clamping adjusting nut is also connected between the adjusting sleeve for clamping and the clamping tightness transmission body. The clamping tightness transmission body is in transmission connection with the axial movement transmission device; for example, the axial movement transmission device includes a fork arm, the fork arm is hinged on the support frame or the fork arm is axially movably arranged on the support frame, a transmission component is provided on the fork arm, and a groove is provided on the clamping tightness transmission body, and the transmission component is arranged in the groove. For example, the groove is an annular groove, the transmission component is a roller, and the clamping tightness transmission body is connected to the rotating main shaft. In addition, the axial movement transmission device further includes a fork transmission member, the fork transmission member is in transmission connection with the fork arm, and the fork transmission member includes a fork power source or a fork handle with a locking unit.

[0014] 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 outside of the rotating main shaft through the spiral groove.

[0015] A support core shaft can also be provided in the hollow cavity of the rotating main shaft, and there is a movable gap between the support core shaft and the rotating main shaft; a central hole is provided at the central axis of the rotating main shaft, the rear end of the support core shaft is fixedly connected to the rotating main shaft, the central hole includes the hollow cavity, and the support core shaft is arranged in the central hole.

[0016] Among them, 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 lifting seat and the second lifting seat is in transmission connection with the floating driving device, and the other is in transmission connection with the lifting driving 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 horizontal slide rail and a slider, and the horizontal slide rail is arranged parallel to the rotating shaft.

[0017] The support frame is in transmission connection with a transverse movement driving device, and the transverse movement driving device is installed and connected to the first lifting seat.

[0018] For another example, the first lifting seat is in transmission connection with the lifting driving device, the lifting driving device is connected to the second lifting seat, and the second lifting seat is in transmission connection with the floating driving device.

[0019] In addition, the first lifting seat is connected to a vertical guide rail, and the second lifting seat is connected to a vertical guide rail.

[0020] For example, the floating drive device includes a floating clutch drive cylinder; the lifting drive device includes a lifting drive motor and a lead screw and nut mechanism, and the lifting drive motor is drivingly connected to the lead screw and nut mechanism; the transverse movement drive device includes a transverse movement drive motor, a transverse lead screw, and a drive nut. The drive nut is fixedly arranged on the support frame, the transverse lead screw is drivingly connected to the drive nut, and the transverse movement drive motor is drivingly connected to the transverse lead screw; the rotating shaft uses a pivot shaft, and a swing bearing is arranged between the swing seat and the pivot shaft. The pivot shaft is also connected to a mounting bracket, the transverse movement drive motor is arranged on the mounting bracket, and the transverse lead screw is concentrically arranged with the pivot shaft; the support frame includes a shaft movement transmission plate, and the drive nut is connected to the shaft movement transmission plate.

[0021] In addition, a spring preloading device is also arranged between the first lifting seat and the swing seat.

[0022] For example, the spring preloading device includes an axial bolt, a preloading nut, and a preloading spring. The axial bolt is connected to the first lifting seat, a through hole is arranged on the swing seat, and after the axial bolt passes through the through hole, it is threadedly connected to the preloading nut. An axial bolt sloshing gap is left in the through hole. The preloading spring is sleeved on the axial bolt, and the preloading spring is located between the preloading nut and the swing seat; a spring abutting bushing is arranged on the swing seat, the spring abutting bushing is arranged in the through hole, and the preloading spring is located between the preloading nut and the spring abutting bushing of the swing seat; the spring abutting bushing has a through hole for the axial bolt to pass through, and the axial bolt sloshing gap is arranged between the through hole and the axial bolt; a spring gland is arranged between the preloading nut and the preloading spring.

[0023] The beneficial effect of the present invention is that in the plate cylinder transmission device of the present invention, the roller shaft of the plate cylinder 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 cylinder can be independently disassembled and assembled, and the disassembly and assembly are relatively more convenient and efficient. The roller shaft of the plate cylinder is clamped and loosened by the roller shaft clamping mouth for disassembly and assembly, and the clamping and opening of the roller shaft clamping mouth can be achieved by operating the clamping tightening transmission body to act on the clamping jaw unit, which is practical and convenient. It is more convenient for the replacement and maintenance of the roller shaft of the plate cylinder, and has more advantages in the use scenario of the plate cylinder with an integrated structure of the drum and the roller shaft.

[0024] In the plate cylinder support device, the first lifting seat is connected to the second lifting seat. One of the first lifting seat and the second lifting seat moves up and down with a large stroke for lifting, and the other moves up and down with a small stroke for floating. It is more practical. The support frame moves up and down with them, and the lifting operation is more reasonable. When the plate cylinder needs to be separated from the pressure, it only needs to float upward with a small stroke to separate from the lower structures (such as anilox roller, impression roller, etc.) to release the pressure. When pressing, it only needs to float downward with a small stroke to press with the lower structures for printing. And moving up and down with a large stroke can create a larger space for separation during the assembly and replacement of the plate cylinder, facilitating the operation. On this basis, the support frame for plate cylinder installation can also be driven by a transverse movement drive device to move horizontally (i.e., along the axial direction of the rotating shaft) on the swing seat for color registration. The structure is more compact. In addition, the mounting frame, transverse movement drive motor, etc. can be supported and connected to the first lifting seat by a pivot shaft (i.e., the rotating shaft), and the swing seat is supported and swings by the rotating shaft (i.e., the pivot shaft). The swing seat loads the plate cylinder assembly (plate cylinder transmission device), avoiding excessive load on the swing seat. Therefore, compared with the prior art, the present invention has prominent substantial features and significant progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following describes the embodiments of the present invention, related details and working principles in conjunction with the drawings.

[0026] Figure 1 It is a schematic side view structure of the plate cylinder transmission device in the invention.

[0027] Figure 2 For Figure 1 The sectional view of , and the schematic view after the fork arm swings.

[0028] Figure 3 For Figure 2 The enlarged view of A in , where the roller shaft is hidden.

[0029] Figure 4 It is a schematic three-dimensional structure of the front end of the rotating main shaft, where the clamping adjustment sleeve is in a disassembled state.

[0030] Figure 5 It is a schematic structure diagram of the plate cylinder support device in the present invention.

[0031] Figure 6 For Figure 5 The left view of .

[0032] Figure 7 For Figure 5 The sectional view taken along A-A in .

[0033] Figure 8 For Figure 7 The enlarged view of I in .

[0034] Figure 9 For Figure 5 The three-dimensional view of .

[0035] Figure 10 is Figure 9 A structural schematic diagram from another angle.

[0036] Figure 11 is Figure 10 A structural schematic diagram from another angle.

[0037] In the figure: 20, the first lifting seat; 21, the second lifting seat; 22, the rotating shaft; 23, the swinging seat; 24, the support frame; 25, the floating driving device; 26, the lifting driving device; 27, the linear sliding pair; 28, the transverse slide rail; 29, the slider; 30, the transverse movement driving device; 31, the vertical guide rail; 32, the vertical guide rail; 33, the floating clutch driving cylinder; 34, the lifting driving motor; 35, the lead screw and nut mechanism; 36, the axial forward movement limit travel switch; 37, the axial backward movement limit travel switch; 38, the switch cooperation part; 39, the transverse movement driving motor; 40, the transverse lead screw; 41, the driving nut; 42, the swinging bearing; 43, the mounting bracket; 44, the shaft movement transmission plate; 45, the spring preloading device; 46, the axial bolt; 47, the preloading nut; 48, the preloading spring; 49, the spring abutting bushing; 50, the through hole; 51, the through hole; 52, the spring gland; 53, the frame; 55, the axial bolt shaking clearance.

[0038] 24, the support frame; 61, the rotating main shaft; 62, the clamping tightening transmission body; 63, the rotating support component; 64, the roller clamping port; 65, the clamping jaw unit; 66, the separation gap; 67, the clamping transmission outer surface; 68, the clamping transmission inner surface; 69, the roller supporting part; 70, the roller gland; 71, the roller bearing; 72, the shaft head; 73, the mounting hole; 74, the rotating driving motor; 75, the transmission shaft; 76, the coupling; 77, the clamping claw unit; 78, the separating gap; 79, the clamping adjusting sleeve; 80, the clamping adjusting nut; 81, the axial movement transmission device; 82, the fork arm; 83, the transmission component; 84, the groove; 85, the fork transmission part; 86, the spiral groove; 87, the hollow cavity; 89, the support core shaft; 90, the moving gap; 91, the central hole; 92, the hinge shaft; 93, the roller; 94, the notch. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Referring to the attached drawings, in the embodiment of this implementation manner, the printing mechanism of the printing press includes a plate cylinder support device and a plate cylinder transmission device. The plate cylinder support device includes a support frame 24, and the plate cylinder transmission device is installed on the support frame 24 and can move with the support frame 24.

[0041] In the printing mechanism of the printing press, the plate cylinder transmission device includes a rotating main shaft 61 and a clamping tightening transmission body 62. The rotating main shaft 61 is arranged on the support frame 24 of the plate cylinder 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, and the rotating main shaft 61 is supported on the support frame 24 by the rotating support component 63 for rotation.

[0042] Among them, a roller shaft clamping port 64 (represented by a dotted line box in the figure) is provided at the front end of the rotating main shaft 61, that is, the roller shaft 93 of the plate cylinder can be inserted into the roller shaft clamping port 64 and clamped.

[0043] The periphery of the roller shaft clamping port 64 is a clamping claw unit 65. There is a separation gap 66 between the clamping claw units 65. Each clamping claw unit 65 encloses to form the roller shaft clamping port 64 inside, that is, the periphery of the roller shaft clamping port 64 is divided into individual clamping claw units 65 by the separation gap 66. When each clamping claw unit 65 clamps inward, it cooperates to clamp the roller shaft 93 of the plate cylinder, and when it is loosened, the roller shaft 93 is released.

[0044] 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 make the clamping claw units 65 clamp inward.

[0045] The clamping tightening transmission body 62 has a clamping transmission inner surface 68. The clamping transmission inner surface 68 is arranged outside the clamping transmission outer surface 67, and the clamping transmission inner surface 68 and the clamping transmission outer surface 67 are arranged in transmission cooperation. That is, when the clamping tightening transmission body 62 moves axially, it will use the clamping transmission inner surface 68 to act on the clamping transmission outer surface 67 to make the clamping claw units 65 clamp inward. When the clamping tightening transmission body 62 axially retreats, the clamping transmission inner surface 68 retreats its position to make the clamping claw units 65 open outward and return to their positions.

[0046] Its working principle is as follows: the roller shaft 93 of the plate cylinder can be inserted into the roller shaft clamping opening 64. 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 cylinder can be connected to the rotating main shaft 61. It not only cooperates to install the roller shaft 93 of the plate cylinder, but also can drive the roller shaft 93 of the plate cylinder to rotate. During assembly, the roller shaft 93 of the plate cylinder is inserted into the roller shaft clamping opening 64, and then the clamping and loosening transmission body 62 axially moves outside the rotating main shaft 61. The inner surface 68 of the clamping transmission acts on the outer surface 67 of the clamping transmission to make the clamping claw unit 65 clamp inward, so that the roller shaft clamping opening 64 clamps the inserted roller shaft 93 of the plate cylinder. During disassembly, the clamping and loosening transmission body 62 axially retreats, the clamping claw unit 65 opens outward, and the roller shaft clamping opening 64 loosens (i.e., opens) to release the roller shaft 93 of the plate cylinder.

[0047] In the plate cylinder transmission device of this printing machine, the roller shaft 93 of the plate cylinder 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 cylinder can be independently disassembled and assembled, and the disassembly and assembly are relatively more convenient and efficient. The roller shaft 93 of the plate cylinder is clamped and released by the roller shaft clamping opening 64 for disassembly and assembly. The clamping and opening of the roller shaft clamping opening 64 can be achieved by operating the clamping and loosening transmission body 62 on the clamping claw unit 65. It is practical and convenient, more convenient for the replacement and maintenance of the roller shaft 93 of the plate cylinder, and has more advantages in the use scenario of the plate cylinder with an integrated structure of the drum and the roller shaft.

[0048] Based on the above embodiments respectively, the following optimizations or further explanations can be made.

[0049] For example, a roller shaft supporting part 69 is further provided at the front end of the support frame 24, and a roller shaft pressing cover 70 is also equipped above the roller shaft supporting part 69. The roller shaft pressing cover 70 (usually connected by a fastener 97) is installed on the support frame 24. There is an installation position for assembling the roller shaft bearing 71 between the roller shaft pressing cover 70 and the roller shaft supporting part 69. The roller shaft bearing 71 on the roller shaft 93 of the plate cylinder will be placed on the roller shaft supporting part 69. The roller shaft supporting part 69 cooperates to support the roller shaft (and the roller shaft bearing 71). In addition, the roller shaft bearing 71 is pressed by the roller shaft pressing cover 70 to stably support the roller shaft 93 (and the roller shaft bearing 71), avoiding the problem of excessive load when the entire roller shaft 93 of the plate cylinder is only connected and fixed by the roller shaft clamping opening 64 of the rotating main shaft 61. The roller shaft supporting effect is better, and it can be applied to the overhanging structure of the roller shaft. The shaft head 72 of the roller shaft is assembled in the roller shaft clamping opening 64.

[0050] 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 axially passes 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.

[0051] The support frame 24 may also be provided with a rotation drive motor 74, which is transmission-connected with the rotation main shaft 61, and the rotation drive motor 74 drives the rotation main shaft 61 to rotate, and the rotation main shaft 61 drives the assembled plate roller to rotate synchronously. There are many transmission connection structures between the rotation main shaft 61 and the rotation drive motor 74. For example, the rotation drive motor 74 is transmission-connected with a transmission shaft 75, and a coupling 76 is provided between the transmission shaft 75 and the rotation main shaft 61, which is convenient for assembly and adaptation of different specifications, and the structure is relatively compact. The rotation drive motor 74 can be equipped with a reducer for transmission connection.

[0052] For another example, the clamping and loosening transmission body 62 adopts a clamping sleeve, and the clamping transmission inner surface 68 is located in the inner circle of the clamping sleeve. The clamping sleeve will be sleeved outside the rotating main shaft 61. The clamping and loosening transmission body 62 has a full circle (one circle) of the clamping transmission inner surface 68, and each clamping claw unit 65 is evenly clamped and the loosening synchronization is better, the clamping force is more uniform, and the clamping effect is better; the clamping claw units 65 are arranged along the circumferential direction on the rotating main shaft 61 (can be evenly arranged). The roller clamping opening 64 is more uniform when it contracts and clamps (i.e. clamps) the roller of the plate roller, the force is better, and the transmission is relatively more balanced and more stable.

[0053] Further optimization can be carried out. The front or rear part of the clamping and loosening transmission body 62 is provided with clamping claw units 77. There is a separation gap 78 between the clamping claw units 77. That is, the front or rear part of the clamping and loosening transmission body 62 is circumferentially divided into individual clamping claw units 77 by the separation gap 78. Each clamping claw unit 77 will form a circle. Among them, the inner surface 68 of the clamping transmission is located on the inner side of the clamping claw unit 77; an adjusting sleeve 79 is also connected to the outside of the clamping and loosening transmission body 62. The adjusting sleeve 79 will be sleeved on the outer ring of the clamping claw unit 77. A clamping adjusting nut 80 is also connected between the adjusting sleeve 79 and the clamping and loosening transmission body 62. By adjusting the relative axial position of the adjusting sleeve 79 through the clamping adjusting nut 80, the tightness of the clamping claw unit 77 can be adjusted (that is, the size of the inner diameter of the circle enclosed by each clamping claw unit 77 - the size of the inner circle, and the size of the separation gap 78 will also change). Thus, the tightness (inner diameter size) of the inner surface 68 of the clamping transmission of the clamping and loosening transmission body 62 can be adjusted, realizing the adjustment of different clamping forces of the clamping and loosening transmission body 62 under the same axial movement stroke (finally fed back to the different opening degrees of the release and clamping of the roller clamping port 64 and the clamping claw unit 65), so as to meet the requirements of different roller diameters. The inner side surface of the adjusting sleeve 79 and the outer side surface of the clamping and loosening transmission body 62 can adopt taper fit (such as the cooperation of the inner taper surface and the outer taper surface) to realize the adjustment of the tightness of clamping.

[0054] In addition, the clamping and loosening transmission body 62 can be connected to the axial movement transmission device 81. The axial movement transmission device 81 cooperates to drive the clamping and loosening transmission body 62 to axially move and switch positions, so that the axial position of the clamping and loosening transmission body 62 is adjustable. By axially moving and switching the position of the clamping and loosening transmission body 62, the inner surface 68 of its clamping transmission axially moves and acts on the outer surface 67 of the clamping transmission of the rotating main shaft 61, so that the clamping claw unit 65 clamps inward; when it is necessary to release the roller, the clamping and loosening transmission body 62 axially retracts. When the clamping and loosening transmission body 62 retracts, the inner surface 68 of the clamping transmission retreats, so that the clamping claw unit 65 opens outward and returns to its original position.

[0055] There are many ways for the axially movable transmission device 81 to drive the clamping tensioning transmission body 62. For example, the axially movable 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 in the groove 84 through the transmission component 83 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 allows the clamping tension transmission body 62 to rotate together with the rotating main shaft 61 and to cooperate with the transmission component 83 for transmission smoothly; the transmission component 83 adopts a roller, and the roller rotates relatively in the annular groove more smoothly; the clamping tension transmission body 62 is connected to the rotating main shaft 61. If the clamping tension transmission body 62 is sleeved on the outside of the rotating main shaft 61, the clamping tension 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 tension 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 connected to the fork arm 82 in transmission. 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).

[0056] For example, the inner surface 68 of the clamp transmission can be an inner conical surface, and / or the outer surface 67 of the clamp transmission can be an outer conical surface, and the inner surface 68 of the clamp transmission and the outer surface 67 of the clamp transmission form a taper matching transmission. Among them, the inner conical surface and the outer conical surface can be a conical surface or a truncated cone surface or a conical plane, a cone surface of a cone, a frustum, or a prism. The inner conical surface and / or the outer conical surface are a conical surface or a truncated cone surface, which is convenient to process and manufacture and runs more smoothly. Of course, the inner surface 68 of the clamp transmission and the outer surface 67 of the clamp transmission can also adopt matching surfaces of other shapes.

[0057] In addition, it is optimized that a spiral groove 86 is provided on the rotating main shaft 61, and the spiral groove 86 takes the central axis (i.e., the axis center line) 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, and a section (corresponding to the section of the spiral groove 86) of a buffer elastic structure is formed on the rotating main shaft 61 to perform micro-swing position and realize swing fine-tuning, which can solve the problem that the roller shaft of the plate roller is not concentric with the rotating main shaft 61, and even if there is a certain (concentricity, coaxiality) deviation, it can be compensated by the buffer elastic structure, so that the roller shaft and the rotating main shaft 61 can be smoothly transferred and transmitted, and the influence of vibration can be reduced to ensure the printing effect. Further optimization, a support mandrel 89 is provided in the hollow cavity 87 of the rotating main shaft 61, and an active gap 90 is left between the support mandrel 89 and the rotating main shaft 61. The active gap 90 provides a swing space for the buffer elastic structure and limits the swing range. The active gap 90 can not only satisfy the rotating main shaft 61 to swing slightly and shake through the section position of the spiral groove 86, but also can be supported and protected by the support mandrel 89 inside to prevent the rotating main shaft 61 from breaking at the spiral groove 86. The size of the active gap 90 can limit the range of shaking and slight swinging, and can be set according to needs. For example, a center hole 91 is provided at the central axis of the rotating main shaft 61, and the rear end of the support mandrel 89 is fixedly connected to the rotating main shaft 61. The center hole 91 includes the hollow cavity 87 (that is, the hollow cavity 87 is a part of the center hole 91, and the center hole 91 can adopt an axially arranged through hole), and the support mandrel 89 is penetrated in the center hole 91. The rear end of the support mandrel 89 can be fixedly connected to the rear end of the rotating main shaft 61.

[0058] In the printing mechanism of the printing press, the plate roller support device also includes a first lifting seat 20, a second lifting seat 21, a rotating shaft 22 and a swing seat 23, and a support frame 24 (such as a support sleeve structure) is used to install and set the plate roller transmission device. The support frame is set up and down, and the plate roller transmission device is set to move with the support frame.

[0059] The first lifting seat 20 is connected to the second lifting seat 21, and the first lifting seat 20 can be lifted up and down on 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 for floating and lifting up and down; the other of the first lifting seat 20 and the second lifting seat 21 is connected to the lifting drive device 26 for moving up and down (such as a large stroke). The first lifting seat and the second lifting seat can be connected and assembled by multiple plates.

[0060] The rotating shaft 22 is horizontally disposed on the first lifting seat 20 , and the rotating shaft 22 will be lifted up and down along with the first lifting seat 20 .

[0061] The swing seat 23 is connected to the rotating shaft 22, and the swing seat 23 is supported by the rotating shaft 22 to swing, and the swing seat 23 will swing around the rotating shaft 22. In addition, 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 slider 29 is axially slidably matched with the transverse slide rail 28, and the linear sliding pair 27 slides axially stably. The transverse slide rail 28 is arranged parallel to the horizontally horizontally arranged rotating shaft 22. The linear sliding pair 27 and the support frame 24 move (swing and lift) along with the swing seat 23. The swing seat 23 swings around the rotating shaft 22 and moves up and down with the first lifting seat 20. The support frame 24 is drivingly connected with a transverse movement driving device 30, and the transverse movement driving device 30 drives the support frame 24 to move axially. The support frame 24 will be axially slid on the swing seat 23 guided by the linear sliding pair 27. The transverse movement driving device 30 is installed and connected to the first lifting seat 20, and the transverse movement driving device 30 also moves up and down with the first lifting seat 20. The swing seat 23 is connected to the transverse slide rail 28 or the 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.

[0062] The working principle and effect of the plate cylinder support device of this flexographic printing mechanism are as follows: 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 moves up and down with a large stroke, and the other moves up and down with a small stroke and floats. It is more practical, and the lifting operation is more reasonable and efficient; when the plate cylinder needs to be off-pressure, it only needs to float upward (rise) with a small stroke to separate and release the pressure from the lower structures (such as an anilox roll, a printing cylinder, etc.). When in pressure, it only needs to float downward (descend) with a small stroke to be in pressure with the lower structures for printing; and the large-stroke up and down movement can separate a larger space during the assembly and replacement of the plate cylinder, which is convenient for operation. On this basis, the support frame 24 for installing the plate cylinder can also be driven by the transverse movement driving device 30 to move horizontally (i.e., in the axial direction of the rotating shaft 22 and the plate cylinder) on the swing seat 23 for color registration. The structure is more compact. Therefore, compared with the prior art, the present invention has outstanding substantial features and remarkable progress.

[0063] Among them, the support frame 24 for installing the plate cylinder is driven by the transverse movement driving device 30 to move axially on the linear sliding pair 27 for color registration, and the structure is more compact. The swing seat 23 is fitted and installed on the rotating shaft 22 (such as a pivot shaft), the swing seat 23 swings around the axis of the rotating shaft 22, and moves up and down with the first lifting seat 20. The support frame 24 swings and lifts synchronously and slightly with the swing seat 23, and the swing of the support frame 24 realizes the automatic centering of the plate cylinder shaft. Only the plate cylinder assembly is carried on the swing seat 23 to avoid excessive load on the swing seat 23 on the rotating shaft 22.

[0064] Based on the above embodiments, the following optimizations or further explanations can be made respectively.

[0065] For example, 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. That is, the first lifting seat 20 moves up and down. The first lifting seat 20 is installed on the second lifting seat 21 to move up and down. The second lifting seat 21 moves up and down in a floating manner. When the second lifting seat 21 floats, the first lifting seat 20 connected to the second lifting seat 21 will also move up and down and float accordingly.

[0066] It can be further optimized. 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 to facilitate stable vertical lifting. The first lifting seat 20 and the second lifting seat 21 can share the vertical guide rail or can be separately configured with vertical guide rails. For example, the second lifting seat 21 is connected to the frame 53 through the vertical guide rail 32, and the first lifting seat 20 is connected to the second lifting seat 21 through the vertical guide rail 31.

[0067] Another example is that the floating drive device 25 includes a floating clutch drive cylinder 33, and the pressure of the floating clutch drive cylinder 33 can be easily adjusted. In addition, the lifting drive device 26 includes a lifting drive motor 34 and a lead screw and nut mechanism 35 (including a nut and a lead screw 54, etc.). The lifting drive motor 34 is in transmission connection with the lead screw and nut mechanism 35. Of course, there are many ways for the floating drive device 25 and the lifting drive device 26, and other ways and transmission structures can also be adopted.

[0068] In addition, an axially forward movement limit travel switch 36 and an axially backward movement limit travel switch 37 are also provided on the first lifting seat 20. The support frame 24 has a switch cooperation part 38. When the support frame 24 axially moves forward and backward on the swing seat 23, the switch cooperation part 38 moves axially (i.e., horizontally) with the support frame 24. The switch cooperation part 38 is arranged between the axially forward movement limit travel switch 36 and the axially backward movement limit travel switch 37. The switch cooperation part 38 cooperates to control the front and rear stop positions of the axial movement stroke of the support frame 24 between the axially forward movement limit travel switch 36 and the axially backward movement limit travel switch 37. Usually, the axially forward movement limit travel switch 36 and the axially backward movement limit travel switch 37 are respectively connected to the transverse movement drive device 30 (which can be connected through a PLC or a controller, etc.).

[0069] For example, the transverse movement driving device 30 includes a transverse movement driving motor 39, a transverse lead screw 40, and a driving nut 41. The driving nut 41 is fixedly arranged on the support frame 24 and moves synchronously with the support frame 24. The transverse lead screw 40 is in transmission connection with the driving nut 41, and the transverse movement driving motor 39 is in transmission connection with the transverse lead screw 40. The transverse movement driving motor 39 drives the transverse lead screw 40 to rotate, and the transverse lead screw 40 causes the driving nut 41 to move axially. The driving nut 41 drives the support frame 24 to move axially back and forth along the transverse slide rail 28. Among them, the rotating shaft 22 can adopt a pivot shaft. 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), so that the swing seat 23 can swing stably and smoothly around the pivot shaft (i.e., the rotating shaft 22); the pivot shaft is also connected with a mounting frame 43 (which can be composed of a mounting plate, etc.) and can be fixedly connected by means of pin connection, etc.; the mounting frame 43 can be used for connecting and supporting the transverse movement driving motor 39. The transverse lead screw 40 is concentrically arranged with the pivot shaft (i.e., on the same axis). The support frame 24 can swing with the swing seat 23 (the support frame 24 rotates around the driving transverse lead screw 40, and the transverse lead screw 40 will rotate in the driving nut 41), so that the mounting frame 43, the transverse movement driving motor 39, etc. are supported and connected to the first lifting seat 20 by the pivot shaft, and the swing seat 23 only bears the plate roller assembly, avoiding excessive load on the swing seat 23.

[0070] In addition, the support frame 24 includes an axial movement transmission plate 44. The driving nut 41 is connected to the axial movement transmission plate 44. The switch cooperation part 38 can be arranged on the axial movement transmission plate 44. The forward axial movement limit switch 36 and the backward axial movement limit switch 37 are arranged on the mounting frame 43. The switch cooperation part 38 is arranged between the forward axial movement limit switch 36 and the backward axial movement limit switch 37. The forward axial movement limit switch 36 and the backward axial movement limit switch 37 are respectively connected to the transverse movement driving motor 39.

[0071] It can be further optimized. A spring preloading device 45 is also provided between the first lifting seat 20 and the swing seat 23. The spring preloading device 45 can press the swing seat 23 tightly against the first lifting seat 20, making the swing of the swing seat 23 relatively more stable.

[0072] For example, the spring preloading device 45 includes an axial bolt 46, a preloading nut 47, and a preloading 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. After the axial bolt 46 passes through the through hole 50, it is threadedly connected to the preloading nut 47. An axial bolt slop clearance 55 is left in the through hole 50 to allow relative sloshing and relative displacement between the axial bolt 46 and the swing seat 23, ensuring smooth swinging of the swing seat 23, avoiding interference between the swing seat 23 and the axial bolt 46 during swinging, ensuring the accuracy of automatic centering when the swing seat 23 swings, and the swing angle of the swing seat 23 is very small for fine adjustment. The preloading spring 48 is sleeved on the axial bolt 46 and is located between the preloading nut 47 and the swing seat 23. The preloading spring 48 is used to press the swing seat 23 against the first lifting seat 20. Among them, the preloading nut 47 adjusts the elastic force (preloading force) of the preloading spring 48 by rotating on the axial bolt 46 to adjust the pressure of the swing seat 23 against the first lifting seat 20. Further optimizing, a spring abutting bushing 49 is provided on the swing seat 23. The spring abutting bushing 49 is arranged in the through hole 50. The preloading spring 48 is located between the preloading nut 47 and the spring abutting bushing 49 of the swing seat 23 for easy assembly and smoother operation of the preloading spring 48. The spring abutting bushing 49 can be used as part of the through hole 50, reducing the processing requirements for the through hole 50. The spring abutting bushing 49 can also protect the swing seat 23. In case of a failure, only the spring abutting bushing 49 needs to be replaced, without replacing the swing seat 23, improving the maintenance productivity and reducing the maintenance cost. Among them, the spring abutting bushing 49 has a through hole 51 for the axial bolt 46 to pass through, and the axial bolt slop clearance 55 is provided between the through hole 51 and the axial bolt 46. A spring gland 52 is arranged between the preloading nut 47 and the preloading spring 48, making it more convenient and stable for the preloading nut 47 to adjust the preloading spring 48, and one end of the preloading spring 48 can be pressed and protected by the spring gland 52.

Claims

1. The printing mechanism of a printing press, comprising a plate cylinder support device and a plate cylinder drive device. The plate cylinder support device includes a support frame (24), and the plate cylinder drive device is installed on the support frame (24). It is characterized in that: The plate cylinder drive device includes a rotating main shaft (61) and a clamping tightness drive body (62). The rotating main shaft (61) is arranged on the support frame (24) of the plate cylinder drive 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 shaft clamping port (64). The periphery of the roller shaft clamping port (64) is a clamping claw unit (65). There is a separation gap (66) between the clamping claw units (65). Each clamping claw unit (65) encloses the roller shaft clamping port (64) on the inner side. The outer side surface of the clamping claw unit (65) is provided with a clamping drive outer surface (67). The clamping tightness drive body (62) has a clamping drive inner surface (68). The clamping drive inner surface (68) is arranged outside the clamping drive outer surface (67). The clamping drive inner surface (68) and the clamping drive outer surface (67) are arranged in transmission cooperation. The clamping tightness drive body (62) is in transmission connection with an axial movement drive device (81). The axial movement drive device (81) includes a fork arm (82). The fork arm (82) is hinged on the support frame (24) or the fork arm (82) is axially movably arranged on the support frame (24). A transmission component (83) is provided on the fork arm (82). A groove (84) is provided on the clamping tightness drive body (62). The transmission component (83) is arranged in the groove (84). The groove (84) is an annular groove, and the transmission component (83) is a roller. The clamping tightness drive body (62) is connected to the rotating main shaft (61). The axial movement drive device (81) further includes a fork drive part (85). The fork drive part (85) is in transmission connection with the fork arm (82). The fork drive part (85) includes a fork power source or a fork handle with a locking unit.

2. The printing mechanism of a printing press according to claim 1, characterized in that: The front end of the support frame (24) is further provided with a roller shaft bearing part (69). A roller shaft pressing cover (70) is further provided above the roller shaft bearing part (69). The roller shaft pressing cover (70) is installed on the support frame (24). An installation position for assembling a roller shaft bearing (71) is left between the roller shaft pressing cover (70) and the roller shaft bearing part (69). The shaft head (72) of the roller shaft is assembled in the roller shaft clamping port (64). The support frame (24) has an installation hole (73). The rotating main shaft (61) and the clamping tightness drive body (62) are arranged in the installation hole (73). The rotating main shaft (61) axially penetrates through the installation hole (73). The rotating support component (63) is arranged between the rotating main shaft (61) and the installation hole (73). A rotating drive motor (74) is further provided on the support frame (24). The rotating drive motor (74) is in transmission connection with the rotating main shaft (61). The rotation drive motor (74) is drivingly connected to a transmission shaft (75), and a coupling (76) is provided between the transmission shaft (75) and the rotation main shaft (61).

3. The printing mechanism of the printing press according to claim 1, wherein: The clamping tightness transmission body (62) adopts a clamping sleeve, the inner surface (68) of the clamping transmission is located in the inner ring of the clamping sleeve, and the clamping sleeve is sleeved outside the rotation main shaft (61); the clamping jaw units (65) are arranged circumferentially on the rotation main shaft (61); The inner surface (68) of the clamping transmission adopts an inner conical surface, and / or the outer surface (67) of the clamping transmission adopts an outer conical surface; The inner conical surface and / or the outer conical surface adopt a conical surface or a frustum conical surface.

4. The printing mechanism of the printing press according to claim 1, wherein: The clamping jaw units (65) are evenly arranged circumferentially; The front or rear part of the clamping tightness transmission body (62) has clamping jaw units (77), a separation gap (78) is provided between the clamping jaw units (77), and the inner surface (68) of the clamping transmission is located on the inner side surface of the clamping jaw units (77), An adjusting clamping sleeve (79) is further connected to the outside of the clamping tightness transmission body (62), and an adjusting clamping nut (80) is also connected between the adjusting clamping sleeve (79) and the clamping tightness transmission body (62).

5. The printing mechanism of the printing press according to claim 1, characterized in that: A spiral groove (86) is provided on the rotation main shaft (61), and the spiral groove (86) takes the central axis of the rotation main shaft (61) as the center line; a hollow cavity (87) of the rotation main shaft (61) is provided at the center of the spiral groove (86), and the hollow cavity (87) communicates with the outside of the rotation main shaft (61) through the spiral groove (86).

6. The printing mechanism of the printing press according to claim 5, wherein: A support core shaft (89) is provided in the hollow cavity (87) of the rotation main shaft (61), and a clearance (90) is left between the support core shaft (89) and the rotation main shaft (61); A central hole (91) is provided at the central axis of the rotation main shaft (61), the rear end of the support core shaft (89) is fixedly connected to the rotation main shaft (61), the central hole (91) includes the hollow cavity (87), and the support core shaft (89) is arranged in the central hole (91).

7. The printing mechanism of the printing press according to claim 1, characterized in that: The support frame is arranged to be liftable; The plate roller support device further includes a first lifting seat (20), a second lifting seat (21), a rotating shaft (22) and a swinging 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 drivingly connected to the floating drive device (25), and the other is drivingly connected to the lifting drive device (26), The rotating shaft (22) is horizontally and transversely arranged on the first lifting seat (20), The swinging seat (23) is connected to the rotating shaft (22), a linear sliding pair (27) is connected between the swinging seat (23) and the support frame (24), the linear sliding pair (27) includes a transverse slide rail (28) and a slider (29), and the transverse slide rail is arranged parallel to the rotating shaft (22), The support frame (24) is drivingly connected to a transverse movement drive device (30), The transverse movement drive device (30) is installed and connected to the first lifting seat (20).

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

9. The printing mechanism of the printing press according to claim 7, characterized in that: 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 driving device (25) includes a floating clutch driving cylinder (33); The lifting driving device (26) includes a lifting driving motor (34) and a lead screw and nut mechanism (35), and the lifting driving motor (34) is in transmission connection with the lead screw and nut mechanism (35); The transverse movement driving device (30) includes a transverse movement driving motor (39), a transverse lead screw (40) and a driving nut (41), the driving nut (41) is fixedly arranged on the support frame (24), the transverse lead screw (40) is in transmission connection with the driving nut (41), and the transverse movement driving motor (39) is in transmission connection with the transverse lead screw (40); The rotating shaft (22) adopts a pivot shaft, a swing bearing (42) is arranged between the swing seat (23) and the pivot shaft, and the pivot shaft is further connected with a mounting frame (43), The transverse movement driving motor (39) is arranged on the mounting frame (43), and the transverse lead screw (40) is concentrically arranged with the pivot shaft; The support frame (24) includes a shaft movement transmission plate (44), and the driving nut (41) is connected to the shaft movement transmission plate (44).

10. The printing mechanism of the printing press according to claim 7, characterized in that: A spring pre-tightening device (45) is further arranged between the first lifting seat (20) and the swing seat (23); The spring pre-tightening device (45) includes an axial bolt (46), a pre-tightening nut (47) and a pre-tightening spring (48). The axial bolt (46) is connected to the first lifting seat (20). A through hole (50) is arranged on the swing seat (23). After the axial bolt (46) passes through the through hole (50), it is threadedly connected with the pre-tightening nut (47). An axial bolt shaking gap (55) is reserved in the through hole (50). The pre-tightening spring (48) is sleeved on the axial bolt (46), and the pre-tightening spring (48) is located between the pre-tightening nut (47) and the swing seat (23); A spring abutting bushing (49) is arranged on the swing seat (23), the spring abutting bushing (49) is arranged in the through hole (50), and the pre-tightening spring (48) is located between the pre-tightening nut (47) and the spring abutting bushing (49) of the swing seat (23); The spring abutting bushing (49) has a through hole (51) for the axial bolt (46) to pass through, and the axial bolt shaking gap (55) is arranged between the through hole (51) and the axial bolt (46); A spring gland (52) is arranged between the pre-tightening nut (47) and the pre-tightening spring (48).

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