Axially positionable rubber roller

Abstract

The utility model relates to printing equipment technical field discloses a kind of rubber roller of adjustable axial positioning, including rubber roller and driving shaft, further including adjusting bolt and center bolt, the central hub of rubber roller is equipped with, expansion sleeve is equipped in hub, one end of driving shaft is arranged in expansion sleeve, the side of hub away from driving shaft is equipped with adjusting plate, adjusting screw rod is arranged in the central hub of adjusting plate, the inner end surface of adjusting screw rod and one end of driving shaft abut, center bolt is connected with one end of driving shaft by thread through adjusting bolt.The utility model can eliminate the gap between driving shaft and hub, and the position of positioning rubber roller on driving shaft can be adjusted conveniently, and the polishing effect of rubber roller is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a rubber roller with adjustable axial positioning. Background Technology

[0002] After printing, the surface of the aluminum can needs to be varnished to make it more wear-resistant. The main working principle is to apply the varnish to the printed can body using a rubber roller. During the debugging of the varnishing mechanism, the axial position of the rubber roller on the drive shaft needs to be adjusted and tightened.

[0003] Currently, existing technologies for applying varnish rollers, such as Figure 1 As shown, the drive shaft 2 is connected to the hub 5 of the rubber roller 1 via a square key 12, thereby transmitting torque. The side plate 13 of the hub 5 is provided with a set of first bolts 14 and two sets of second bolts 15. The shank of the first bolt 14 passes through the side plate 13 and is threadedly connected to the drive shaft 2. The two sets of second bolts 15 are located on both sides of the first bolt 14. The shank of the second bolt 15 passes through the side plate 13 and abuts against the drive shaft 2. The first bolt 14 and the second bolt 15 cooperate with each other, which can make the rubber roller 1 move axially or be positioned on the drive shaft 2.

[0004] The existing technology has at least the following problems: First, the drive shaft and the hub are keyed together, and the keyed connection must be a clearance fit. The clearance will affect the coaxiality between the drive shaft and the rubber roller, thus affecting the uniformity of the varnish coating. Second, the force of tightening the first bolt and the second bolt will inevitably differ, which will cause the axis of the hub to deflect, making the rubber roller unable to be concentric with the drive shaft, thus affecting the coating quality. Third, during the production process, due to the clearance between the drive shaft and the hub, the first bolt will be continuously subjected to the shear force from the hub. Under long-term action, the first bolt will fatigue and break, resulting in quality hazards and downtime losses. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by developing an axially adjustable rubber roller. This invention can eliminate the gap between the drive shaft and the hub, and also allows for easy adjustment of the position of the positioning rubber roller on the drive shaft, effectively improving the glossing effect of the rubber roller.

[0006] The technical solution of this utility model to solve the technical problem is as follows: an axially adjustable rubber roller, including a rubber roller and a drive shaft, and also including an adjusting bolt and a center bolt. A hub is provided in the center of the rubber roller, and an expansion sleeve is provided inside the hub. One end of the drive shaft is set in the expansion sleeve. An adjusting plate is provided on the side of the hub away from the drive shaft. An adjusting screw is set in the center of the adjusting plate. The inner end face of the adjusting screw abuts against one end of the drive shaft. The center bolt passes through the adjusting bolt and is threaded to one end of the drive shaft.

[0007] As an optimization, a stop-mount cavity is provided in the center hole of the hub, and the expansion sleeve is set in the stop-mount cavity. By providing a stop-mount cavity, the expansion sleeve can be accommodated and installed, and the expansion sleeve can be positioned at the upper limit in the axial direction, making it convenient for workers to tighten or loosen the high-strength bolts of the expansion sleeve.

[0008] As an optimization, a threaded hole is provided through the center of the adjusting plate, and the rod of the adjusting screw is threaded into the threaded hole. The threaded hole allows for the installation of the adjusting screw, facilitating control of its screw-in depth.

[0009] As an optimization, the adjusting plate is also provided with several sets of adjusting holes, which are located around the mounting threaded holes and correspond to the high-strength bolts of the expansion sleeve. By providing adjusting holes, workers can easily tighten or loosen the high-strength bolts of the expansion sleeve through the adjusting plate without having to open the adjusting plate.

[0010] As an optimization, the adjustment hole is an elongated arc shape. This makes it easy to locate the high-strength bolts of the expansion sleeve and prevents the adjustment plate from obstructing them.

[0011] As an optimization, a countersunk hole is provided on the adjusting screw along the axial direction, and the shank of the center bolt passes through the countersunk hole and is threaded to one end of the drive shaft. By providing the countersunk hole, the head of the center bolt can be hidden.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By incorporating a rubber roller, varnish can be applied to the printed can body. A drive shaft and hub drive the roller's rotation. An expansion sleeve provides two key benefits: first, it seamlessly connects the drive shaft and hub, ensuring their coaxiality and improving the overall coaxiality of the roller, thus significantly enhancing the varnish application quality; second, it replaces a key connection to transmit torque from the drive shaft to the hub, reducing internal clearances and improving coaxiality and perpendicularity, thereby reducing or eliminating shear forces on the bolts. An adjustment plate serves two purposes: first, it seals the hub, protecting the expansion sleeve; second, it allows for the installation of adjusting bolts and a center bolt. These bolts work together to adjust and position the hub on the drive shaft. The adjusting bolts allow for inward or outward movement of the hub, while the center bolt locks the hub in place. The coaxial double-bolt adjustment structure makes adjustment more convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a rubber roller and a drive shaft in the prior art.

[0014] Figure 2 This is a front view of one embodiment of the present utility model.

[0015] Figure 3 for Figure 2 A cross-sectional view along the AA direction.

[0016] Figure 4 This is an exploded view of one embodiment of the present invention.

[0017] In the diagram: 1. Rubber roller; 2. Drive shaft; 3. Adjusting bolt; 4. Center bolt; 5. Hub; 6. Expansion sleeve; 7. Adjusting plate; 8. Stop mounting cavity; 9. Mounting threaded hole; 10. Adjusting hole; 11. Countersunk hole; 12. Square key; 13. Side plate; 14. First bolt; 15. Second bolt. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0019] Example 1 Figures 2 to 4 As one embodiment of this utility model, such as Figures 2 to 4 As shown, an axially adjustable rubber roller includes a rubber roller 1 and a drive shaft 2, as well as an adjusting bolt 3 and a center bolt 4. A hub 5 is provided in the center of the rubber roller 1 via a bolt, and an expansion sleeve 6 is provided inside the hub 5. One end of the drive shaft 2 is located inside the expansion sleeve 6. An adjusting plate 7 is provided on the side of the hub 5 away from the drive shaft 2. The adjusting plate 7 is connected to the hub 5 via a bolt. The adjusting bolt 3 is located in the center of the adjusting plate 7, and the inner end face of the adjusting bolt 3 abuts against one end of the drive shaft 2. The screw of the center bolt 4 passes through the adjusting bolt 3 and is threadedly connected to one end of the drive shaft 2.

[0020] By setting the rubber roller 1, the varnish can be applied to the printed can body; by setting the drive shaft 2 and the hub 5, the rubber roller 1 can be driven to rotate; by setting the expansion sleeve 6, firstly, the drive shaft 2 and the hub 5 can be seamlessly connected, ensuring the coaxiality of the drive shaft 2 and the hub 5, thereby improving the coaxiality of the drive shaft 2 and the rubber roller 1, greatly improving the coating quality of the varnish; secondly, it can replace the key connection to transmit the torque of the drive shaft 2 to the hub 5, reduce the internal clearance of the components, improve coaxiality and perpendicularity, and reduce or even eliminate the shear force on each bolt from the hub 5; by setting the adjustment Plate 7 serves two purposes: first, it seals the hub 5 and protects the expansion sleeve 6; second, it allows for the installation of adjusting bolts 3 and center bolts 4. By using adjusting bolts 3 and center bolts 4, they can work together to adjust and position the hub 5 on the drive shaft 2. Adjusting bolt 3 allows the hub 5 to move inward or outward on the drive shaft 2. The adjusting bolt 3 and drive shaft 2 are in surface contact, ensuring that the axis of the hub 5 is parallel to the axis of the drive shaft 2, preventing the hub 5 axis from tilting. Center bolt 4 locks the position of the hub 5 on the drive shaft 2. The coaxial double-bolt adjustment structure makes adjustment more convenient.

[0021] like Figure 3 and Figure 4 As shown, a stop mounting cavity 8 is provided in the center hole of the hub 5 on the side away from the drive shaft 2, and the expansion sleeve 6 is disposed in the stop mounting cavity 8. By providing the stop mounting cavity 8, the expansion sleeve 6 can be accommodated and installed, and the expansion sleeve 6 can be axially limited, making it convenient for workers to tighten or loosen the high-strength bolts of the expansion sleeve 6.

[0022] like Figure 3 and Figure 4 As shown, a threaded hole 9 is provided through the center of the adjusting plate 7, and the rod of the adjusting bolt 3 is threaded into the threaded hole 9. By providing the threaded hole 9, the adjusting bolt 3 can be installed, and the screwing depth of the adjusting bolt 3 can be easily controlled.

[0023] like Figure 3 and Figure 4 As shown, the adjusting plate 7 is also provided with several sets of adjusting holes 10, which are arranged around the mounting threaded holes 9 and correspond to the high-strength bolts of the expansion sleeve 6. By providing adjusting holes 10, it is possible for workers to easily tighten or loosen the high-strength bolts of the expansion sleeve 6 through the adjusting plate 7 without opening the adjusting plate 7.

[0024] like Figure 4 As shown, the adjusting hole 10 is an arc-shaped elongated hole. This allows for easy location of the high-strength bolt of the expansion sleeve 6, preventing the adjusting plate 7 from obstructing it.

[0025] like Figure 3 and Figure 4 As shown, the adjusting bolt 3 has a countersunk hole 11 along the axial direction, and the shank of the center bolt 4 passes through the countersunk hole 11 and is threaded to one end of the drive shaft 2. By setting the countersunk hole 11, the head of the center bolt 4 can be hidden.

[0026] During installation, mount the hub 5 onto the drive shaft 2. Then, loosen the high-strength screws of the expansion sleeve 6, mount the expansion sleeve 6 onto the drive shaft 2, and push it between the drive shaft 2 and the hub 5. Next, install the adjusting plate 7 onto the hub 5 with bolts to seal the expansion sleeve 6. Then, screw the adjusting bolt 3 into the mounting threaded hole 9. Finally, pass the center bolt 4 through the countersunk hole 11 of the adjusting bolt 3 and screw it into the threaded hole on the drive shaft 2 to complete the initial installation. During adjustment, unscrew the center bolt 4 and screw in the adjusting bolt 3 to move the hub 5 outward. Screw in the center bolt 4 and unscrew the adjusting bolt 3 to move the hub 5 inward. After confirming the position, tighten the center bolt 4 and the adjusting bolt 3 for initial positioning. Then, use an Allen wrench through the adjusting hole 10 to evenly tighten the high-strength bolts on the expansion sleeve 6 to seamlessly connect the drive shaft 2 and the hub 5, completing the final positioning.

[0027] The descriptions of the orientation or relative positional relationships of the structure in this utility model, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer", are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

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