A quick-positioning gravure printing roller

Abstract

This utility model discloses a quick-positioning gravure printing roller, including a hollow shaft inner frame. An outer roller sleeve is fitted onto the surface of the hollow shaft inner frame. Equally spaced limiting strips are provided on the inner wall of the outer roller sleeve. Limiting grooves adapted to the limiting strips are fixedly connected to the surface of the hollow shaft inner frame. Equally spaced elastic positioning pins are radially fixedly installed on one side of the hollow shaft inner frame. Conical positioning rings can be detachably installed at both ends of the hollow shaft inner frame. This utility model employs a spring designed on the printing roller and positioning rings designed at both ends of the roller shaft to lock and position the printing roller from both radial and axial positioning modes. Furthermore, the axial clearance is automatically compensated through spring preload. The radial and axial positioning and locking functions are integrated into one unit, improving the adjustment speed of printing roller clearance errors, increasing the efficiency of printing roller replacement, and providing convenience for users.

Description

Technical Field

[0001] This utility model relates to the field of gravure printing roller technology, and in particular to a fast positioning gravure printing roller. Background Technology

[0002] When replacing traditional gravure printing rollers, multiple adjustments are required to align the printing pattern, resulting in low replacement efficiency, insufficient positioning accuracy, and impact on print quality stability. This situation occurs when the axial position of the roller is misaligned with the printing path, leading to axial gaps. Furthermore, traditional roller structures lack automatic compensation for axial gaps, making precise positioning difficult during manual installation. Consequently, multiple adjustments are necessary before printing, significantly slowing down roller replacement time and reducing replacement efficiency.

[0003] To address the aforementioned problems, this utility model provides improvements. Summary of the Invention

[0004] This invention proposes a fast positioning gravure printing roller, which solves the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows: A quick-positioning gravure printing roller includes a hollow shaft inner frame, an outer roller sleeve is sleeved on the surface of the hollow shaft inner frame, and equal-spaced limiting strips are provided on the inner wall of the outer roller sleeve. A limiting groove adapted to the limiting strips is fixedly connected to the surface of the hollow shaft inner frame. Equal-spaced elastic positioning pins are radially fixedly installed on one side of the hollow shaft inner frame. Conical positioning rings are detachably installed at both ends of the hollow shaft inner frame. A shaft end block is fixedly connected to the inner cavity of the conical positioning ring. The shaft end block is threadedly installed on the inner side of the hollow shaft inner frame. A fastening bolt is provided through the top of the conical positioning ring, and the bottom end of the fastening bolt passes through the hollow shaft inner frame and extends into the interior of the shaft end block.

[0006] The present invention, as described above, for quickly positioning a gravure printing roller, further comprises: bolt holes one adapted to fastening bolts are provided on both sides of the top of the hollow shaft inner frame, and bolt holes two adapted to fastening bolts are provided on the top of the conical positioning ring.

[0007] The present invention, as described above, for quickly positioning a gravure printing roller, further comprises: a butterfly spring sleeved at one end of the hollow shaft inner frame, and a locking wheel threadedly installed at one end of the hollow shaft inner frame.

[0008] The present invention, as described above, is used for rapid positioning of gravure printing rollers. Further, both ends of the hollow shaft inner frame are provided with a retaining seat, and the tapered positioning ring is rotatably installed inside the retaining seat at one end facing the retaining seat.

[0009] The present invention, as described above, is used for rapid positioning of gravure printing rollers. Further, the mounting bracket consists of upper and lower parts, which are fixed together by bolts.

[0010] The present invention, as described above, for quickly positioning a gravure printing roller, further comprises: a plurality of positioning grooves being provided at one end of the surface of the hollow shaft inner frame; a sliding cavity being provided inside the locking wheel; a positioning pin adapted to the positioning groove being slidably installed inside the sliding cavity; a recess adapted to the positioning pin being provided inside the sliding cavity; a spring being sleeved on the surface of the positioning pin; and the two ends of the spring being fixedly connected to the positioning pin and the inner wall of the recess, respectively.

[0011] The present invention further comprises the following: one end of the locking wheel is provided with a threaded hole communicating with the sliding cavity, and a threaded screw adapted to the positioning pin is installed inside the threaded hole.

[0012] In summary, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model adopts a spring on the printing roller and a positioning ring at both ends of the roller shaft to lock and position the printing roller in both radial and axial positioning modes. The axial gap is automatically compensated by the spring preload. The radial and axial positioning and locking functions are integrated into one, which improves the adjustment speed of the printing roller gap error, improves the printing roller replacement efficiency, and provides convenience for users.

[0014] 2. This utility model features bolt hole one and bolt hole two, both of which are used to install fastening bolts. During installation, the fastening bolt is inserted into bolt hole two from top to bottom, and then through bolt hole one and finally inserted into the shaft end block. Finally, the fastening bolt is tightened to fix it, thus completing the final installation work.

[0015] 3. This utility model uses a butterfly spring and a locking wheel. The butterfly spring and the locking wheel work together. After the outer roller sleeve is installed, the butterfly spring is put on, and then the locking wheel is used to lock it. The elastic force of the butterfly spring can be used to position the outer roller sleeve. Finally, the locking wheel locks it in place, thus providing assistance and convenience for users to disassemble and replace the outer roller sleeve.

[0016] 4. This utility model uses a card holder that is fixed to the machine. Therefore, the two conical positioning rings are rotatably installed on the two card holders. The card holder is divided into upper and lower parts. During installation, the conical positioning ring is placed on one part and then merged with the other part. Finally, it is fastened together with bolts. During disassembly, the above steps are reversed, which provides assistance and convenience for users' disassembly and assembly work.

[0017] 5. This utility model, through the arrangement of positioning groove, sliding cavity, positioning pin, concave cavity, and spring, ensures that when installing the locking wheel, the end of the positioning pin first extends into the corresponding positioning groove, and then moves out of the current positioning groove as the locking wheel rotates. Simultaneously, the positioning pin retracts into the sliding cavity and slides within the concave cavity, thus stretching the spring. However, the end of the positioning pin remains attached to the surface of the hollow shaft inner frame. As the locking wheel rotates and moves, the positioning pin also moves accordingly. Along the installation path of the locking wheel, the end of the positioning pin moves out and then re-enters the corresponding positioning grooves in sequence until the locking wheel is installed. At this point, the end of the positioning pin is locked in the current positioning groove, thus positioning the locking wheel. Without external force, the locking wheel will not move freely. Finally, tightening the threaded screw positions the positioning pin in its current position, and the positioning pin also fixes the locking wheel in its current position, providing convenience for the user's work.

[0018] 6. This utility model, through the setting of threaded holes and threaded screws, ensures that when the locking wheel is rotated and installed in the appropriate position, the end of the locating pin will be locked in the corresponding locating groove, thereby limiting and fixing the locking wheel. In order to prevent the locking wheel from slipping, the threaded screw is turned to abut against the tail end of the locating pin, restricting the locating pin from moving out of the locating groove, thus ensuring the firmness and stability of the locking wheel after installation and providing convenience for users. When disassembling the locking wheel, the threaded screw is turned outward to move away from the locating pin. At this time, the locking wheel is rotated forcefully, and the end of the locating pin will be squeezed out of the locating groove. On the path of the locking wheel's rotation, the end of the locating pin will be locked into the locating groove in sequence under the action of the spring, and will also move out of the locating groove in sequence until the locking wheel is completely removed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded three-dimensional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the hollow shaft inner frame;

[0023] Figure 4 for Figure 3A partial three-dimensional structural diagram of A in the middle;

[0024] Figure 5 This is a three-dimensional sectional view of the locking wheel.

[0025] Figure 6 This is a partial three-dimensional structural diagram of the locating pin.

[0026] In the diagram: 1. Hollow shaft inner frame, 2. Outer roller sleeve, 3. Limiting strip, 4. Limiting groove, 5. Elastic positioning pin, 6. Conical positioning ring, 7. Shaft end block, 8. Fastening bolt, 9. Bolt hole one, 10. Bolt hole two, 11. Butterfly spring, 12. Locking wheel, 13. Positioning groove, 14. Card seat, 15. Threaded hole, 16. Threaded screw, 17. Sliding cavity, 18. Positioning pin, 19. Concave cavity, 20. Spring. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example

[0028] A quick-positioning gravure printing roller includes a hollow shaft inner frame 1, an outer roller sleeve 2 fitted onto the surface of the hollow shaft inner frame 1, and equally spaced limiting strips 3 on the inner wall of the outer roller sleeve 2. A limiting groove 4, adapted to the limiting strips 3, is fixedly connected to the surface of the hollow shaft inner frame 1. Equally spaced elastic positioning pins 5 are radially fixedly installed on one side of the hollow shaft inner frame 1. Conical positioning rings 6 are detachably installed at both ends of the hollow shaft inner frame 1. A shaft end block 7 is fixedly connected to the inner cavity of the conical positioning ring 6. The shaft end block 7 is threaded onto the inner side of the hollow shaft inner frame 1. A fastening bolt 8 is passed through the top of the conical positioning ring 6, and the bottom end of the fastening bolt 8 passes through the hollow shaft inner frame 1 and extends into the interior of the shaft end block 7.

[0029] This invention employs a spring on the printing roller and positioning rings at both ends of the roller shaft to lock and position the printing roller in both radial and axial positioning modes. Furthermore, the spring preload automatically compensates for axial clearance, integrating radial and axial positioning with locking functions. This improves the speed of adjusting printing roller clearance errors, increases printing roller replacement efficiency, and provides convenience for users.

[0030] The specific usage process is as follows: First, remove the fastening bolts 8 from the hollow shaft inner frame 1 and the conical positioning rings 6. Then, disassemble the printing machine's mounting bracket and remove the entire printing roller. Rotate the two conical positioning rings 6 off the hollow shaft inner frame 1. Next, loosen the locking wheel 12 and remove it from the hollow shaft inner frame 1. Then, remove the disc spring 11 and the outer roller sleeve 2 from the hollow shaft inner frame 1 in sequence. The limiting groove 4 will move out of the limiting strip 3. Then, replace it with a new outer roller sleeve 2 and align the new outer roller sleeve 2 with the hollow shaft inner frame 1. At the same time, align the limiting strip 3 with the limiting groove 4. Then, put the outer roller sleeve 2 onto the hollow shaft inner frame 1. At the same time, the limiting groove 4 will also be engaged in the corresponding limiting strip 3. As the outer roller sleeve 2 slides on the hollow shaft inner frame 1, the elastic positioning pin 5 on the hollow shaft inner frame 1 will be engaged in the corresponding insertion hole on the outer roller sleeve 2. For details, please refer to [reference needed]. Figure 4 It is understood that the disc spring 11 is then fitted onto the hollow shaft inner frame 1, and the locking wheel 12 is then rotated and installed onto the hollow shaft inner frame 1. The locking wheel 12 is continuously rotated, thereby pushing the disc spring 11 and the outer roller sleeve 2 to move on the hollow shaft inner frame 1 until the side end of the outer roller sleeve 2 abuts against the convex ring on the hollow shaft inner frame 1. This operation can be performed as soon as the outer roller sleeve 2 is fitted onto the hollow shaft inner frame 1. Finally, the operation on the locking wheel 12 ends when it can no longer be turned. At this point, the elastic positioning pin 5 can lock the outer roller sleeve 2. The outer roller sleeve 2 is positioned so that the preload of the elastic positioning pin 5 can automatically compensate for the axial clearance. The disc spring 11 can also quickly clamp and fix the outer roller sleeve 2. Therefore, the combination of locking wheel 12 and disc spring 11 is used. By rotating locking wheel 12, the outer roller sleeve 2 can be quickly clamped and fixed, and the outer roller sleeve 2 can also be quickly released, thereby saving and shortening the operation time of disassembling and assembling the printing roller, and improving the replacement efficiency of the printing roller. The above process can realize the radial and axial clearance adjustment of the outer roller sleeve 2 during the installation of the outer roller sleeve 2, ensuring the proper functioning of the printing roller and the printing press. The precise alignment of the path shortens the debugging time of the printing roller, improves printing quality and accuracy, increases the printing efficiency of the printing roller, and provides convenience for users. This solves the problem of accumulated positioning errors in the traditional printing roller directly separated from the mounting bracket structure, facilitates individual maintenance or replacement of roller sleeves with different textures, and reduces equipment maintenance costs. Then, the conical positioning rings 6 are installed at both ends of the hollow shaft inner frame 1, and then the conical positioning rings 6 are installed on the mounting bracket 14. Finally, the installation and replacement of the printing roller are completed. Therefore, the design of springs on the printing roller and positioning rings at both ends of the roller shaft are used to lock and position the printing roller from both radial and axial positioning modes. The axial clearance is automatically compensated by the spring preload, integrating radial and axial positioning and locking functions into one, improving the debugging speed of printing roller clearance error, increasing the replacement efficiency of the printing roller, and providing convenience for users. Among them, the elastic positioning pin 5 is a headless hollow cylindrical body with axial grooves and chamfers at both ends. Its outer diameter is slightly larger than the assembly hole diameter, and it can be used for positioning, connection, and fixing between parts.

[0031] The hollow shaft inner frame 1 has bolt holes 9 on both sides of its top, which are adapted to the fastening bolts 8. The top of the conical positioning ring 6 has bolt holes 10 adapted to the fastening bolts 8.

[0032] Specifically, the bolt holes 9 and 10 are designed to install fastening bolts 8. During installation, the fastening bolts 8 are inserted into the bolt holes 10 from top to bottom. The fastening bolts 8 pass through the bolt holes 9 and are finally inserted into the shaft end block 7. Finally, the fastening bolts 8 are tightened to fix the bolts and complete the final installation.

[0033] A butterfly spring 11 is sleeved on one end of the hollow shaft inner frame 1, and a locking wheel 12 is threaded onto one end of the hollow shaft inner frame 1.

[0034] Specifically, the butterfly spring 11 and the locking wheel 12 are designed to work together. After the outer roller sleeve 2 is installed, the butterfly spring 11 is attached, and then the locking wheel 12 is used to lock it. The elastic force of the butterfly spring 11 can be used to position the outer roller sleeve 2, and finally the locking wheel 12 locks it in place, thus providing assistance and convenience for users to disassemble and replace the outer roller sleeve 2.

[0035] Both ends of the hollow shaft inner frame 1 are provided with a retaining seat 14. The tapered positioning ring 6 is rotatably installed inside the retaining seat 14 at one end facing the retaining seat 14. The retaining seat 14 is composed of upper and lower parts, which are fixed together by bolts.

[0036] Specifically, the mounting bracket 14 is fixed to the machine, so the two conical positioning rings 6 are rotatably mounted on the two mounting brackets 14. The mounting bracket 14 is divided into upper and lower parts. During installation, the conical positioning rings 6 are placed on one part, then merged with the other part, and finally tightened together with bolts. During disassembly, the above steps are reversed, thus providing assistance and convenience for users' disassembly and assembly work.

[0037] The hollow shaft inner frame 1 has multiple positioning grooves 13 on one end of its surface. The locking wheel 12 has a sliding cavity 17 inside. A positioning pin 18 that matches the positioning groove 13 is slidably installed inside the sliding cavity 17. A recess 19 that matches the positioning pin 18 is also provided inside the sliding cavity 17. A spring 20 is sleeved on the surface of the positioning pin 18. The two ends of the spring 20 are fixedly connected to the inner walls of the positioning pin 18 and the recess 19, respectively.

[0038] Specifically, the positioning groove 13, sliding cavity 17, positioning pin 18, recess 19, and spring 20 are configured such that when the locking wheel 12 is installed, the end of the positioning pin 18 first extends into the corresponding positioning groove 13, and then moves out of the current positioning groove 13 as the locking wheel 12 rotates. At the same time, the positioning pin 18 retracts into the sliding cavity 17, and the positioning pin 18 also slides in the recess 19. Consequently, the positioning pin 18 stretches the spring 20, but the end of the positioning pin 18 always remains against the surface of the hollow shaft inner frame 1. As the locking wheel 12 rotates and moves, the positioning pin 18... 8 will also move along the path of the locking wheel 12. The end of the positioning pin 18 will move out of the positioning groove 13 and then into it in sequence until the locking wheel 12 is installed. At this time, the end of the positioning pin 18 will be stuck in the current positioning groove 13, thus positioning the locking wheel 12. Without the intervention of external force, the locking wheel 12 will not move at will. Finally, tighten the threaded screw 16 to position the positioning pin 18 in the current position. At the same time, the positioning pin 18 will also fix the locking wheel 12 in the current position, providing convenience for the user's work.

[0039] One end of the locking wheel 12 is provided with a threaded hole 15 that communicates with the sliding cavity 17, and a threaded screw 16 adapted to the positioning pin 18 is installed inside the threaded hole 15.

[0040] Specifically, the threaded hole 15 and threaded screw 16 are designed so that when the locking wheel 12 is rotated and installed to the appropriate position, the end of the locating pin 18 will be locked in the corresponding locating groove 13, thereby limiting and fixing the locking wheel 12. In order to prevent the locking wheel 12 from slipping, the threaded screw 16 is turned to abut against the tail end of the locating pin 18, restricting the locating pin 18 from moving out of the locating groove 13, thus ensuring the firmness and stability of the locking wheel 12 after installation and providing convenience for the user's work. When disassembling the locking wheel 12, the threaded screw 16 is turned outward away from the locating pin 18. At this time, the locking wheel 12 is rotated forcefully, and the end of the locating pin 18 will be squeezed out of the locating groove 13. On the path of the rotation of the locking wheel 12, the end of the locating pin 18 will be locked into the locating groove 13 in sequence under the action of the spring 20, and will also move out of the locating groove 13 in sequence until the locking wheel 12 is completely removed.

[0041] It should be noted that the functions to be achieved by each hardware component in this utility model are supported by a large number of mature technologies and belong to the prior art. The essence of this utility model is to optimize and combine existing hardware and its connection methods for specific application scenarios to meet the adaptation requirements of specific application scenarios and solve the problems raised in the background technology (without involving improvements to the internal software of the hardware).

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid positioning gravure printing roller, comprising a hollow shaft inner frame (1), characterized in that: The hollow shaft inner frame (1) is fitted with an outer roller sleeve (2). The inner wall of the outer roller sleeve (2) is provided with equally spaced limiting strips (3). The surface of the hollow shaft inner frame (1) is fixedly connected with a limiting groove (4) that matches the limiting strips (3). One side of the hollow shaft inner frame (1) is radially fixedly installed with equally spaced elastic positioning pins (5). Both ends of the hollow shaft inner frame (1) are detachably installed with conical positioning rings (6). The inner cavity of the conical positioning ring (6) is fixedly connected with a shaft end block (7). The shaft end block (7) is threadedly installed on the inner side of the hollow shaft inner frame (1). The top of the conical positioning ring (6) is provided with a fastening bolt (8). The bottom end of the fastening bolt (8) passes through the hollow shaft inner frame (1) and extends into the interior of the shaft end block (7).

2. The rapid positioning gravure printing roller according to claim 1, characterized in that: The hollow shaft inner frame (1) has bolt holes 1 (9) on both sides of the top, which are adapted to the fastening bolts (8), and the top of the conical positioning ring (6) has bolt holes 2 (10) adapted to the fastening bolts (8).

3. The rapid positioning gravure printing roller according to claim 2, characterized in that: A butterfly spring (11) is sleeved on one end of the hollow shaft inner frame (1), and a locking wheel (12) is threaded on one end of the hollow shaft inner frame (1).

4. The rapid positioning gravure printing roller according to claim 3, characterized in that: Both ends of the hollow shaft inner frame (1) are provided with a card seat (14), and the tapered positioning ring (6) is rotatably installed inside the card seat (14) at one end facing the card seat (14).

5. A rapid positioning gravure printing roller according to claim 4, characterized in that: The card holder (14) consists of two parts, upper and lower, which are fixed together by bolts.

6. A rapid positioning gravure printing roller according to claim 5, characterized in that: Multiple positioning grooves (13) are provided at one end of the surface of the hollow shaft inner frame (1). A sliding cavity (17) is provided inside the locking wheel (12). A positioning pin (18) that matches the positioning groove (13) is slidably installed inside the sliding cavity (17). A concave cavity (19) that matches the positioning pin (18) is provided inside the sliding cavity (17). A spring (20) is sleeved on the surface of the positioning pin (18). The two ends of the spring (20) are fixedly connected to the inner wall of the positioning pin (18) and the concave cavity (19), respectively.

7. A rapid positioning gravure printing roller according to claim 6, characterized in that: One end of the locking wheel (12) is provided with a threaded hole (15) that communicates with the sliding cavity (17), and the threaded hole (15) is fitted with a threaded screw (16) that is compatible with the positioning pin (18).

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