An extended inner sleeve for connecting the inner shaft of a printing press

Abstract

This utility model discloses an extended inner sleeve for connecting the inner shaft of a printing press, belonging to the field of printing machinery equipment. The technical solution adopted by this utility model is an extended inner sleeve for connecting the inner shaft of a printing press, including a shaft support and a transmission shaft rotatably connected to the shaft support. An installation seam is provided between the shaft support and the outer wall of the transmission shaft to prevent contact and friction between the outer wall of the transmission shaft and the shaft support. A guide sliding support assembly is provided within the installation seam to support the transmission shaft while reducing frictional resistance during its rotation. This utility model isolates the shaft support from direct contact with the transmission shaft through the installation seam and reduces frictional resistance using the guide sliding support assembly, effectively solving the problems of wear, vibration, and high maintenance costs caused by friction in traditional structures. It has the advantages of reducing frictional resistance, reducing component wear, extending service life, reducing maintenance costs, and improving transmission stability.

Description

Technical Field

[0001] This utility model belongs to the field of printing machinery and equipment, and specifically relates to an extended inner sleeve for connecting the inner shaft of a printing machine. Background Technology

[0002] In the field of printing machinery, the connection structure between the drive shaft and its support directly affects the operational stability and service life of the equipment. Currently, traditional printing presses generally use a rotating connection where the drive shaft and support are in direct contact. While this structure is simple, it has significant drawbacks in actual operation. Because the drive shaft operates at high speed and continuously during printing, the sliding friction generated by direct contact causes rapid wear between the inner wall of the support and the outer surface of the drive shaft. This not only shortens the component replacement cycle and increases maintenance costs but can also lead to uneven wear, causing the drive shaft to rotate eccentrically, generating vibration and noise, and affecting printing accuracy. Simultaneously, the heat generated by friction accelerates the failure of the lubricating medium, further exacerbating component wear. Furthermore, traditional structures lack effective support and protection measures, making them prone to loosening and deformation during long-term use, affecting transmission stability. As printing equipment develops towards higher speeds and greater precision, existing technologies are insufficient to meet the requirements for the reliability and durability of transmission systems. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] This utility model provides an extended inner sleeve for connecting the inner shaft of a printing press, in order to solve at least one of the above-mentioned technical problems.

[0004] The technical solution adopted in this utility model is as follows:

[0005] An extended inner sleeve for connecting the inner shaft of a printing press includes a shaft support and a drive shaft rotatably connected to the shaft support. The shaft support and the outer wall of the drive shaft have an installation gap to prevent the outer wall of the drive shaft from contacting and rubbing against the shaft support. A guide sliding support assembly is provided in the installation gap to support the drive shaft while reducing the frictional resistance during its rotation.

[0006] Furthermore, this application also proposes that the guide support assembly includes a bearing, the outer ring of the bearing is fixed to the inner wall of the mounting seam, the inner ring of the bearing is fixedly connected to the outer wall of the transmission shaft, and a plurality of balls are provided between the outer ring and the inner ring of the bearing.

[0007] Furthermore, this application also proposes that the side wall of the shaft support is detachably connected to a protective plate, the protective plate having an arc-shaped reinforcing surface that is in close contact with the outer wall of the bearing, and the protective plate having two sets symmetrically arranged about the bearing.

[0008] Furthermore, this application also proposes that the drive shaft passes through the shaft support along the mounting seam to have an extension end extending to both sides of the shaft support, a mounting assembly for mounting an inner shaft is provided on the extension end located inside the shaft support, and a transmission component for transmission is provided on the extension end located outside the shaft support.

[0009] Furthermore, this application also proposes that the mounting assembly includes a mounting base, which is fixedly connected to the inner extension end of the drive shaft by bolts, and a mounting plate is detachably connected to the mounting base, the mounting plate being provided with a plurality of bolt holes for mounting the inner shaft at circumferential intervals.

[0010] Furthermore, this application also proposes that the transmission component includes any one of a transmission gear, a pulley, or a bevel gear.

[0011] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0012] 1. This application eliminates contact friction fundamentally by forming a physical isolation layer through the installation seam. The rolling support structure reduces the sliding friction coefficient to less than one-fifth of its original value, significantly reducing frictional heat generation. The split shaft support design facilitates the assembly and maintenance of bearing components, avoiding the inconvenience of disassembling the entire drive shaft when replacing bearings in an integral structure. It effectively solves the technical problem of contact wear between rotating and supporting components. The rolling support method significantly reduces frictional resistance and extends the service life of the shaft support and drive shaft. The physical isolation structure prevents metal debris from entering the friction surface, maintaining rotational accuracy and stability. The modular design facilitates the rapid replacement of damaged components, reducing equipment maintenance downtime.

[0013] 2. By using the cooperation of bearings and balls, the friction mode of the drive shaft changes from sliding to rolling during rotation, significantly reducing frictional resistance. Simultaneously, the support structure disperses contact stress, preventing excessively rapid localized wear. Through the above technical solution, this application effectively reduces frictional resistance during drive shaft rotation, lowers the wear rate of the contact area between the shaft support and the drive shaft, extends component service life, and avoids lubricant deterioration caused by the accumulation of frictional heat, thus improving transmission stability.

[0014] 3. The removable guard plate design reduces maintenance time while ensuring protective performance. Compared to a single-sided guard plate, the symmetrical guard plate structure can counteract the bidirectional centrifugal force generated during bearing operation, preventing deformation of the guard plate on one side and achieving bidirectional stable support for the bearing, thus reducing abnormal wear of the drive shaft caused by bearing runout. The removable guard plate structure simplifies the equipment maintenance process and reduces equipment downtime due to maintenance operations. The tight fit between the arc-shaped reinforcing surface and the bearing effectively disperses the mechanical load, extending the service life of both the guard plate and the bearing.

[0015] 4. This application solves the bearing wear problem caused by unilateral force in traditional inner shaft connection structures, reducing the vibration amplitude of the drive shaft during operation. The split design of the mounting components allows for quick replacement of inner shafts of different specifications, reducing equipment downtime. The replaceability of the transmission components enables the extended inner sleeve to be adapted to various power systems such as gear drives and belt drives, improving equipment compatibility. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of a specific embodiment of the present utility model;

[0017] Figure 2 This is the second structural schematic diagram of a specific embodiment of the present utility model;

[0018] Figure 3 This is the third structural schematic diagram of a specific embodiment of the present utility model.

[0019] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0020] In the attached diagram:

[0021] 1. Shaft support; 11. Mounting seam; 12. Protective plate; 2. Bearing; 3. Drive shaft; 4. Mounting seat; 5. Mounting plate. Detailed Implementation

[0022] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0024] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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 simplifying the description, 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.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Reference Figures 1 to 3 An extended inner sleeve for connecting the inner shaft of a printing press includes a shaft support 1 and a transmission shaft 3 rotatably connected to the shaft support 1. The characteristic feature is that an installation gap 11 is provided between the shaft support 1 and the outer wall of the transmission shaft 3 to prevent contact and friction between the outer wall of the transmission shaft 3 and the shaft support 1. A guide sliding support assembly is provided within the installation gap 11 to support the transmission shaft 3 while reducing its frictional resistance during rotation. The installation gap 11 refers to the annular gap formed between the inner wall of the shaft support 1 and the outer surface of the transmission shaft 3. Specifically, it can be achieved by increasing the inner diameter of the shaft support 1 or decreasing the outer diameter of the transmission shaft 3. The width of this gap must meet the free rotation requirements of the transmission shaft 3. The guide sliding support assembly refers to a rolling support mechanism disposed within the gap. Specifically, it can be implemented using a rolling bearing 2 structure, with its outer ring fixed to the shaft support 1 and its inner ring fixed to the transmission shaft 3, achieving rotational support through rolling elements.

[0028] Those skilled in the art will understand that the shaft support 1 adopts a split structure design, with its inner diameter larger than the outer diameter of the drive shaft 3, forming an annular mounting seam 11. The rolling bearing 2 in the guide slide support assembly is precisely assembled within the mounting seam 11. The outer ring of the bearing 2 is fixed to the inner wall of the shaft support 1 by interference fit or bolt connection, while the inner ring of the bearing 2 is fixed to the surface of the drive shaft 3 by keyway or heat-shrink fitting. When the drive shaft 3 rotates, the rolling elements roll between the inner and outer ring tracks, converting sliding friction into rolling friction. The width of the mounting seam 11 is calculated to ensure that the distance between the inner and outer rings of the bearing 2 meets the radial load bearing requirements, while preventing contact between the shaft and the support.

[0029] This solution forms a physical isolation layer through the installation seam 11, fundamentally eliminating contact friction. The rolling support structure reduces the sliding friction coefficient to less than one-fifth of its original value, significantly reducing frictional heat generation. The split-type shaft support 1 design facilitates the assembly and maintenance of the bearing 2 assembly, avoiding the inconvenience of disassembling the entire drive shaft 3 when replacing bearing 2 in an integral structure. It effectively solves the technical problem of contact wear between rotating and supporting components. The rolling support method significantly reduces frictional resistance and extends the service life of the shaft support 1 and drive shaft 3. The physical isolation structure prevents metal debris from entering the friction surface, maintaining rotational accuracy and stability. The modular design facilitates the rapid replacement of damaged components, reducing equipment maintenance downtime.

[0030] As one specific embodiment of the guide sliding support component in this application, refer to Figures 1-3 The guide support assembly includes a bearing 2. The outer ring of the bearing 2 is fixed to the inner wall of the mounting seam 11, and the inner ring of the bearing 2 is fixedly connected to the outer wall of the drive shaft 3. Several balls are arranged between the outer and inner rings of the bearing 2. The inner wall of the mounting seam 11 is fixed to the outer ring of the bearing 2 by welding or interference fit, and the outer wall of the drive shaft 3 is connected to the inner ring of the bearing 2 by keyway or heat fitting. Multiple balls are evenly distributed between the outer and inner rings of the bearing 2. The balls roll in a circular track. When the drive shaft 3 rotates, it drives the inner ring of the bearing 2 to rotate, and the balls roll accordingly, thus converting sliding friction into rolling friction. Through the cooperation of the bearing 2 and the balls, the friction mode changes from sliding to rolling when the drive shaft 3 rotates, significantly reducing frictional resistance. At the same time, the support structure disperses contact stress, preventing excessively rapid local wear. Through the above technical solution, this application effectively reduces the frictional resistance during the rotation of the drive shaft 3, reduces the wear rate of the contact area between the shaft support 1 and the drive shaft 3, extends the service life of the components, and avoids the problem of lubricant deterioration caused by the accumulation of frictional heat, thereby improving transmission stability.

[0031] As a preferred example of the above-described implementation method, refer to Figures 1-2The side wall of the bearing support 1 is detachably connected to a protective plate 12. The protective plate 12 has an arc-shaped reinforcing surface that fits tightly against the outer wall of the bearing 2. Two sets of protective plates 12 are symmetrically arranged above and below the bearing 2. The protective plate 12 is a plate-like structure covering the outside of the bearing 2, which can be formed by stamping metal sheets. Its function is to protect the bearing 2 from external impurities and enhance the mechanical strength of the bearing 2 mounting area. The arc-shaped reinforcing surface is a curved surface structure that matches the outer contour of the bearing 2, which can be formed by mold casting or machining, allowing the protective plate 12 to form surface contact with the outer wall of the bearing 2 to distribute load pressure. The symmetrical arrangement of two sets of protective plates 12 means that two identical protective plates 12 are arranged vertically along the axis of the bearing 2, which can be achieved through mirror-symmetrical mounting holes, providing bidirectional support to the bearing 2 to improve operational stability.

[0032] The guard plate 12 is bolted to the side wall of the shaft support 1, and its inner arc-shaped reinforcing surface fits tightly against the outer wall of the bearing 2. When the drive shaft 3 drives the bearing 2 to rotate, the guard plate 12 applies a uniform supporting force to the outer ring of the bearing 2 through surface contact, avoiding local stress concentration. The two sets of guard plates 12 arranged symmetrically form a closed-loop constraint structure, which can effectively suppress the radial runout generated by the bearing 2 during high-speed rotation. The detachable feature of the guard plate 12 means that when replacing the bearing 2 or cleaning the mounting seam 11, only the guard plate 12 needs to be removed, without disassembling the entire transmission component.

[0033] This solution, through the design of a detachable guard plate 12, shortens maintenance time while ensuring protective performance. Compared to a single-sided guard plate 12, the symmetrically arranged guard plate 12 structure can counteract the bidirectional centrifugal force generated during bearing 2 operation, preventing unilateral deformation of the guard plate 12 and achieving bidirectional stable support for bearing 2. This reduces abnormal wear of the drive shaft 3 caused by bearing 2 sway. The detachable guard plate 12 structure simplifies equipment maintenance procedures and reduces equipment downtime due to maintenance operations. The tight fit between the arc-shaped reinforcing surface and bearing 2 effectively disperses mechanical loads, extending the service life of both the guard plate 12 and bearing 2.

[0034] As a preferred embodiment of the drive shaft 3, refer to Figures 1-3 The drive shaft 3 passes through the shaft support 1 along the mounting seam 11, having extension ends extending to both sides of the shaft support 1. A mounting assembly for mounting the inner shaft is provided on the inner extension end of the shaft support 1, and a transmission component for transmission is provided on the outer extension end of the shaft support 1. After passing through the shaft support 1, the drive shaft 3 forms an inner and outer extension structure. The inner extension end is connected to the inner shaft via the mounting assembly, and the outer extension end is connected to the external drive mechanism via the transmission component. The mounting assembly adopts a split design, with a mounting plate 5 fixed by bolts. The bolt holes circumferentially distributed on the mounting plate 5 can accommodate inner shafts of different sizes. The transmission component selects gears or pulleys according to power transmission requirements to achieve synchronous movement between the drive shaft 3 and the external mechanism.

[0035] This application solves the problem of bearing 2 wear caused by unilateral force in traditional inner shaft connection structures, reducing the vibration amplitude of the drive shaft 3 during operation. The split design of the mounting components allows for quick replacement of inner shafts of different specifications, reducing equipment downtime. The replaceability of the transmission components enables the extended inner sleeve to be adapted to various power systems such as gear drives and belt drives, improving equipment compatibility.

[0036] The mounting assembly includes a mounting base 4, which is fixedly connected to the inner extension end of the drive shaft 3 by bolts. A mounting plate 5 is detachably connected to the mounting base 4, and the mounting plate 5 is provided with a number of bolt holes for mounting the inner shaft at intervals around its circumference.

[0037] Mounting base 4 is rigidly fixed to the inner extension end of drive shaft 3 by bolts. Mounting plate 5 is detachably connected to mounting base 4. The bolt holes distributed circumferentially on mounting plate 5 allow the inner shaft to be precisely positioned by bolt tightening. When drive shaft 3 rotates, mounting base 4 transmits torque to mounting plate 5, thereby driving the inner shaft to rotate synchronously. The detachable connection structure between mounting plate 5 and mounting base 4 allows for replacement or maintenance of the inner shaft without disassembling the entire drive shaft 3; only the bolts on mounting plate 5 need to be removed. Through the above technical solution, this application solves the problems of difficult maintenance and poor adaptability of traditional inner shaft mounting structures. By using modular mounting components, it achieves rapid disassembly and precise positioning of the inner shaft, reduces the risk of abnormal wear of drive shaft 3 due to installation deviations, and extends the overall service life of the transmission system.

[0038] As a specific embodiment of a transmission component, the transmission component includes any one of a transmission gear, a pulley, or a bevel gear. The outer extension end of the transmission shaft 3 is fixed to one of the transmission gear, pulley, or bevel gear via a key connection or flange connection. Power is transmitted to the adjacent mechanical structure through this transmission component. Transmission gears are suitable for rigid transmission scenarios requiring high precision and high torque; pulleys are suitable for flexible transmission scenarios requiring vibration damping and shock absorption; and bevel gears are suitable for angular transmission scenarios where the axial direction changes. The transmission component and the transmission shaft 3 are secured with an interference fit or bolts to achieve synchronous rotation without relative sliding, avoiding the sliding friction losses caused by traditional direct contact transmissions.

[0039] This application solves the problems of rapid component wear and decreased transmission accuracy caused by traditional direct contact transmission. The transmission gears achieve slip-free transmission through tooth surface meshing, reducing frictional losses; the pulleys buffer vibration through belt drive, extending component life; and the bevel gears optimize spatial layout through angular transmission, improving transmission stability. The optional configuration of different transmission components can adapt to the power transmission needs of diverse printing equipment, ensuring ink and water uniformity on the printing plate while reducing maintenance frequency.

[0040] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0041] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0042] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An extended inner sleeve for connecting the inner shaft of a printing press, comprising a shaft support (1) and a transmission shaft (3) rotatably connected to the shaft support (1), characterized in that, The shaft support (1) and the outer wall of the transmission shaft (3) have an installation seam (11) to prevent the outer wall of the transmission shaft (3) from contacting and rubbing against the shaft support (1). The installation seam (11) is provided with a guide sliding support assembly to support the transmission shaft (3) while reducing the frictional resistance during its rotation.

2. The extended inner sleeve for connecting the inner shaft of a printing press according to claim 1, characterized in that, The guide support assembly includes a bearing (2), the outer ring of the bearing (2) is fixed to the inner wall of the mounting seam (11), the inner ring of the bearing (2) is fixedly connected to the outer wall of the transmission shaft (3), and a number of balls are provided between the outer ring and the inner ring of the bearing (2).

3. The extended inner sleeve for connecting the inner shaft of a printing press according to claim 2, characterized in that, The side wall of the shaft support (1) is detachably connected to a guard plate (12). The guard plate (12) is provided with an arc-shaped reinforcing surface that is in close contact with the outer wall of the bearing (2). The guard plate (12) is provided in two sets symmetrically above and below the bearing (2).

4. The extended inner sleeve for connecting the inner shaft of a printing press according to claim 1, characterized in that, The drive shaft (3) passes through the shaft support (1) along the mounting seam (11) and has extension ends extending to both sides of the shaft support (1). An installation assembly for installing an inner shaft is provided on the extension end located inside the shaft support (1), and a transmission component for transmission is provided on the extension end located outside the shaft support (1).

5. An extended inner sleeve for connecting the inner shaft of a printing press according to claim 4, characterized in that, The mounting assembly includes a mounting base (4), which is fixedly connected to the inner extension end of the drive shaft (3) by bolts. A mounting plate (5) is detachably connected to the mounting base (4), and the mounting plate (5) is provided with a plurality of bolt holes for mounting the inner shaft at intervals around the circumference.

6. An extended inner sleeve for connecting the inner shaft of a printing press according to claim 4, characterized in that, The transmission component includes any one of a transmission gear, a pulley, or a bevel gear.

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