A new type of shimming support structure on a printing press

Abstract

The utility model discloses a novel shift support structure on printing machine relates to printing machine shift roll axle support technical field, and this structure includes support flange, shift roll axle, axle sleeve and the bearing of setting between support flange and axle sleeve, and the inner race of bearing abuts on the inner step of support flan, and the outer race abuts on the outside of axle sleeve, makes axle sleeve can rotate with shift roll axle together periphery, only bears the friction of axial shift of it and produces, thereby significantly reduces the periphery wear and tear between axle sleeve and shift roll axle. The inside of support flange is equipped with inner connecting piece for connecting the other components in printing machine, and the axial positioning of bearing outer race is realized to the stop ring through setting hole, and when disassembling, the stop ring can be taken out first, and then the bearing and axle sleeve can be disassembled in turn, and the axle sleeve is replaced alone conveniently, and the sealing ring is arranged in the inside of axle sleeve and can be filled with the grease in the cooperation gap, so as to block the ink, water vapor and dust, and improve the lubricating effect. The utility model discloses simple and reliable structure can reduce wear and tear significantly, and reduce shift roll bounce.

Description

Technical Field

[0001] This utility model relates to the field of printing press roller shaft support technology, specifically a novel axial support structure for printing presses. Background Technology

[0002] In offset printing, to ensure uniform ink distribution on the printing plate, the water roller and ink roller typically need to reciprocate axially while rotating circumferentially. This axial movement effectively breaks the tendency of ink to accumulate on the roller surface, improves the uniformity of ink transfer, and plays a crucial role in maintaining ink-water balance during the printing process.

[0003] In traditional slip-through support structures, a common form is to use fixed bushings to support the slip-through roller shaft, as shown in the example below. Figure 2 As shown in the diagram, in this type of structure, the roller shaft is supported by a bushing and undergoes both axial movement and circumferential rotation during the printing process. However, the bushing supporting the roller shaft is fixed relative to the supporting flange, meaning that the bushing and the roller shaft are always in a relative sliding state during operation. As the equipment is used over time, friction between the roller shaft and the bushing inevitably leads to wear on the mating surfaces. When wear intensifies, the clearance between the bushing and the roller shaft increases, easily causing the roller to jump circumferentially, resulting in uneven printing pressure and ink distribution, thus severely affecting printing quality.

[0004] Furthermore, in existing structures, bushings are typically integrated with the support flange through casting, welding, or riveting. Since the bushing is a fixed component, it cannot be disassembled independently after wear; it must be replaced along with the support flange. The support flange, however, is often connected to multiple components inside the equipment, making its disassembly complex, requiring significant downtime, and resulting in cumbersome and costly maintenance procedures, leading to a substantial waste of manpower and resources.

[0005] In existing technologies, for example, patent document CN216842710U discloses a method that improves lubrication and heat dissipation by setting oil injection holes, spiral oil guide grooves, and oil storage chambers on the fixed bushing and cooperating with water cooling pipes. The focus is on optimizing the lubrication and cooling structure of the fixed bushing itself. Patent document CN101065249A mainly uses multi-bearing arrangement, eccentric sleeves, or adjusting sleeves to achieve roller support and position and pressure adjustment, which is a typical "roller / bearing-frame" support method. In addition, utility model CN2355884Y discloses a mechanism for controlling the axial movement of the printing roller. By setting bearing seats, nuts, cylinders, and other components, the axial movement position of the printing roller is driven or limited to eliminate the printing "ghosting" phenomenon. Although the aforementioned existing technologies have improved the printing press structure in terms of lubrication and cooling, roller support adjustment, and roller movement control, they generally adopt a structure in which the roller or shaft is directly supported on the frame by bearings. They have not proposed setting bearings between the support flange and the bushing to form a hierarchical support form of "support flange - bearing - bushing - roller shaft", nor have they solved the problem of the bushing being able to rotate circumferentially with the roller and be easily replaced after wear.

[0006] In summary, existing skew roller support structures suffer from problems such as rapid wear of bushings, increased skew roller runout, difficult maintenance, and high maintenance costs. There is an urgent need for a new type of skew roller support structure that can reduce wear and facilitate maintenance and replacement. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the existing defects and provide a new type of axial support structure for printing presses. By setting a bearing between the support flange and the bushing, the traditional fixed bushing structure is fundamentally changed, and the bushing can rotate circumferentially with the axial roller shaft, bearing only the friction generated by the axial movement of the axial roller shaft, which can effectively solve the problems in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a novel axial movement support structure for a printing press, comprising a support flange, an axial roller shaft, a bushing, and a bearing. The support flange is fixed to the frame of the printing press by bolts. The axial roller shaft can rotate circumferentially and reciprocate axially along its axis. The bushing is sleeved on the outside of the axial roller shaft and slides with it, providing support for the axial movement of the axial roller shaft. The bearing is disposed between the support flange and the bushing, with its inner ring abutting against the inner step of the support flange and its outer ring abutting against the bushing. The bearing bears the radial load and at least part of the axial load of the axial roller shaft, allowing the bushing to rotate circumferentially with the axial roller shaft relative to the support flange, bearing only the friction generated by the axial movement of the axial roller shaft, thereby reducing circumferential wear between the bushing and the axial roller shaft. An inner connector is provided on the inner side of the support flange for connecting other parts inside the printing press.

[0009] Furthermore, it also includes a retaining ring for the bore, which is embedded in the inner groove of the support flange and abuts against the outer ring of the bearing. The retaining ring for the bore serves to axially position the outer ring of the bearing and restrict the axial position of the bearing relative to the support flange. When disassembling, the retaining ring for the bore needs to be removed first, and then the bearing and bushing can be taken out, and then the bushing can be removed.

[0010] Furthermore, a sealing ring is provided on the inner side of the bushing. The sealing ring is located between the support flange and the roller shaft. The sealing ring is used to prevent ink, moisture and dust from entering the bearing and the fitting gap between the bushing and the roller shaft, and to maintain the internal lubrication environment.

[0011] Furthermore, the bushing and the bearing are detachably connected by an interference fit or fasteners. When the bushing is worn and needs to be replaced, the bushing can be removed and replaced separately by disassembling the bearing, without having to replace the support flange.

[0012] Furthermore, the space between the roller shaft and the bushing is filled with grease and / or lubricating oil to reduce the frictional resistance and wear when the roller shaft moves axially; the roller shaft is the core of the water roller shaft or ink roller shaft in the printing press, so that the water roller or ink roller can rotate circumferentially and move axially during the printing process to evenly distribute water and ink.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by setting a bearing between the support flange and the bushing, changes the bushing from the traditional "fixed and non-rotating" to being able to rotate circumferentially with the roller shaft, and only bears the frictional load generated by the axial movement of the roller shaft, which significantly reduces the circumferential sliding wear between the bushing and the roller shaft; thus, the fit clearance between the bushing and the roller shaft remains stable during long-term use, the circumferential runout of the roller is effectively suppressed, the water roller or ink roller runs more smoothly during the printing process, and the uniformity of water and ink transfer and printing quality are significantly improved.

[0014] 2. This utility model adopts a hierarchical support structure of "support flange - bearing - bushing - roller shaft", and combines it with a retaining ring for axial positioning of the bearing outer ring. This allows the bearing and bushing to be disassembled and installed separately without disassembling the support flange and its internal connecting parts. When the bushing is worn and needs to be replaced, the bushing can be removed by simply removing the retaining ring and the bearing in sequence. This avoids the major disassembly and replacement of the entire support assembly in the traditional structure, significantly shortens maintenance time, reduces downtime losses and spare parts costs, and improves the convenience of equipment maintenance.

[0015] 3. By setting a sealing ring on the inner side of the bushing, a closed lubrication cavity is formed between the support flange and the roller shaft, which can effectively prevent ink, water vapor and dust from entering the bearing and the mating clearance area, ensuring that the bearing and bushing-roller shaft mating surfaces are in a good lubrication state for a long time, further reducing wear and improving operational reliability. This structure is mainly composed of conventional bearings, bushings and sealing elements. It is simple in design and easy to process, and is suitable for various roller support positions such as water roller shaft or ink roller shaft in printing presses. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of a traditional support structure.

[0017] In the diagram: 1. Support flange, 2. Hole retaining ring, 3. Bearing, 4. Shaft sleeve, 5. Inner connecting piece, 6. Roller shaft, 7. Sealing ring. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element 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. Example 1

[0019] Please see Figure 1-2This utility model provides a technical solution: a novel traversing support structure for a printing press, including a support flange 1, a traversing roller shaft 6, a bushing 4, a bearing 3, a retaining ring for holes 2, an inner connecting piece 5, and a sealing ring 7, etc.

[0020] The support flange 1 is bolted to the frame of the printing press to form the mounting support base for the roller shaft 6; the inner side of the support flange 1 is integrally or fixedly provided with an internal connector 5 for connecting with other functional components inside the printing press, thereby forming an overall structural frame.

[0021] The roller shaft 6 passes through the inside of the support flange 1. During the printing process, it can reciprocate along the axial direction and rotate circumferentially. In order to provide support for the roller shaft 6 during axial movement, a bushing 4 is fitted around its outer circumference. The bushing 4 and the roller shaft 6 are in sliding fit to ensure the smoothness of the movement.

[0022] The improvement of this utility model lies in that a bearing 3 is provided between the supporting flange 1 and the bushing 4; as Figure 1 As shown, the inner ring of bearing 3 abuts against the inner step of support flange 1 to form inner positioning, and the outer ring of bearing 3 abuts against the outer surface of bushing 4, so that bushing 4 can rotate circumferentially synchronously with roller shaft 6 and no longer have large circumferential sliding friction with roller shaft 6; in this way, when roller shaft 6 moves axially, bushing 4 only bears small friction in the axial direction, which significantly reduces the wear of bushing and greatly extends its service life.

[0023] To ensure stable installation of bearing 3, a retaining ring 2 is inserted into the recessed position of the support flange 1, such as... Figure 1 As shown; the retaining ring 2 of the bore abuts against the outer ring of the bearing 3, which is used to axially position the bearing 3 on the outside and prevent the bearing from axially displacing during the movement process; during disassembly, only the retaining ring 2 of the bore needs to be removed first, and then the bearing 3 and the bushing 4 can be removed in sequence, so that the bushing 4 can be disassembled and installed separately, avoiding the shortcomings of the traditional structure that requires the entire support flange to be disassembled.

[0024] To ensure lubrication, a sealing ring 7 is installed on the inner side of the bushing 4. The sealing ring 7 is located between the support flange 1 and the roller shaft 6. It is used to prevent foreign objects such as water vapor, ink, and paper dust from entering the bearing 3 and the mating clearance area between the bushing 4 and the roller shaft 6, ensuring that the mating parts are in a good lubrication environment. Depending on actual needs, grease or lubricating oil can be filled between the roller shaft 6 and the bushing 4 to further reduce friction and improve operational stability.

[0025] In practical applications, the roller shaft 6 is usually the core of the water roller shaft or ink roller shaft of the printing press. With the support of the structure of this utility model, the water roller or ink roller can maintain stable circumferential rotation and axial movement during the printing process, so as to achieve uniform transfer of water and ink. The structure of this utility model not only greatly reduces the wear of the bushing and extends its service life, but also significantly reduces maintenance costs and improves the daily maintenance efficiency of the printing press because the bushing can be disassembled separately.

[0026] like Figure 2 The diagram shows a traditional support structure. In this traditional structure, the bushing is fixed and integrally connected with the support flange. The bearing is not located on the outside of the bushing, so the bushing is subjected to large friction in the circumferential direction and suffers severe wear. This utility model effectively overcomes the technical defects of the traditional structure by adding a bearing between the support flange and the bushing.

[0027] In summary, the technical solution of this utility model can significantly reduce bushing wear, reduce roller slippage, improve the uniformity of ink transfer, and enable bushing to be detachable and replaceable, thereby reducing maintenance difficulty and cost. It has good application value and promotion significance.

[0028] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A novel traversing support structure for a printing press, comprising a support flange (1), a traversing roller shaft (6), a bushing (4), and a bearing (3), characterized in that: The support flange (1) is fixed to the frame of the printing press by bolts. The bushing (4) is sleeved on the outside of the roller shaft (6) and slides between it and the roller shaft (6). The bearing (3) is located between the support flange (1) and the bushing (4). The inner ring of the bearing (3) abuts against the inner step of the support flange (1), and the outer ring of the bearing (3) abuts against the bushing (4). The bushing (4) can rotate circumferentially with the roller shaft (6) relative to the support flange (1) and only bears the friction generated by the axial movement of the roller shaft (6). An inner connecting piece (5) is provided on the inner side of the support flange (1).

2. The novel axial support structure for a printing press according to claim 1, characterized in that: It also includes a retaining ring (2), which is embedded in the inner groove of the support flange (1) and abuts against the outer ring of the bearing (3).

3. The novel axial support structure for a printing press according to claim 1, characterized in that: A sealing ring (7) is provided on the inner side of the bushing (4), which is located between the support flange (1) and the roller shaft (6).

4. The novel lateral support structure for a printing press according to claim 1, characterized in that: The bushing (4) and the bearing (3) are detachably connected by an interference fit or fasteners.

5. A novel lateral support structure for a printing press according to claim 1, characterized in that: The space between the roller shaft (6) and the bushing (4) is filled with grease and / or lubricating oil.

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