Connecting beam for a web offset printing press

Abstract

This utility model discloses a connecting beam for a web offset printing machine, belonging to the technical field of offset printing machine components. It includes a connecting beam body, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body is laterally fixed between the transmission surface wall panel and the operating surface wall panel by fasteners. An axial mounting cavity is provided throughout the connecting beam body. At least one bearing shaft is provided within the axial mounting cavity, and the bearing shaft is detachably connected to the connecting beam body by a split-type pressure block. The paper-cutting actuator and the anti-stretching wheel assembly are spaced apart along the axial direction of the bearing shaft, and are radially connected to the bearing shaft by a bushing-type mounting block. This utility model solves the technical problem of traditional connecting beams only providing basic support, requiring independent installation of components such as the paper-cutting actuator and the anti-stretching wheel, resulting in a dispersed structure and large space occupation by integrating the paper-cutting actuator, the anti-stretching wheel assembly, and the connecting beam body.

Description

Technical Field

[0001] This utility model belongs to the technical field of offset printing machine components, specifically relating to a connecting beam for a web offset printing machine. Background Technology

[0002] Connecting beams for printing unit wall panels, typically made of cast iron, are used to connect the drive and operating wall panels of a web-fed printing press. They fix the wall panels in the correct position, effectively preventing deformation and displacement, ensuring the overall stability of the printing press structure, and reducing vibration during machine operation, especially at high speeds. The number of beams depends on the printing press specifications and structure, and they are usually positioned vertically, horizontally, or vertically between wall panels to form a stable support structure. For example, in large web-fed printing presses, connecting beams may be distributed at the top, bottom, and middle of the wall panels. Their shape is mostly rectangular or cylindrical, and their dimensions are determined based on the pressure, torque, and other mechanical requirements of the printing press. The design requirements are as follows: Large, high-speed printing presses have large tie beams to withstand greater forces; however, their function is too limited, serving only as a connection to the wall panels. Paper cutters in the printing unit are used to cut materials and prevent them from getting tangled on the printing cylinder or other rotating guide rollers. These paper cutters occupy a significant amount of space and should ideally be as close to the printing cylinder as possible; currently, there is no fixed placement for them. Anti-stretch rollers are devices used in printing equipment to prevent paper from expanding or contracting during transport. They are typically installed above the drain line, but due to the limited space, manual cleaning of the water rollers in the drain line can easily result in hand injuries or is inconvenient.

[0003] Furthermore, because the pneumatic actuator and piping are externally mounted, the paper cutter assembly is forced to be installed far from the printing cylinder, with an axial spacing generally greater than 500mm. This results in a delayed paper-cutting action and an increased lateral space occupancy. The anti-stretching rollers need to be independently fixed to the outside of the wall panel, forming a multi-point distributed layout, which not only increases the lateral dimensions of the equipment but also leads to an expansion of the stress concentration area on the wall panel. Utility Model Content

[0004] The purpose of this invention is to provide a connecting beam for a roll offset printing machine, which solves the technical problem that traditional connecting beams only provide basic support and that components such as paper breakage and anti-stretching wheels need to be installed independently, resulting in a dispersed structure and large space occupation.

[0005] The technical solution adopted in this utility model is a connecting beam for a web offset printing machine, including a connecting beam body, a paper-cutting actuator, and an anti-stretching wheel assembly; the connecting beam body is laterally fixed between the transmission surface wall plate and the operating surface wall plate by fasteners, and an axial mounting cavity is provided through the connecting beam body; at least one bearing shaft is provided in the axial mounting cavity, and the bearing shaft is fixedly and detachably connected to the connecting beam body by a split pressure block; the paper-cutting actuator and the anti-stretching wheel assembly are distributed at intervals along the axial direction of the bearing shaft, and the paper-cutting actuator and the anti-stretching wheel assembly are radially connected to the bearing shaft by a bushing-type mounting block.

[0006] The features of this utility model also include: The split-type pressure block assembly includes a main pressure block and a secondary pressure block. The secondary pressure block is fixed to the inner wall of the connecting beam body by countersunk bolts. The main pressure block and the secondary pressure block form an adjustable clamping gap by stepped bolts. A shock-absorbing rubber pad is provided in the clamping gap. The mating clamping surfaces of the main pressure block and the secondary pressure block are provided with arc-shaped grooves that match the outer diameter of the bearing shaft.

[0007] The anti-expansion wheel assembly includes a first bushing-type mounting block, a geared motor, a wheel seat, and an anti-expansion wheel. The first bushing-type mounting block is fixed to the bearing shaft by fasteners. A motor mounting seat is connected to the side wall of the first bushing-type mounting block by fasteners. The geared motor is mounted on the motor mounting seat. The wheel seat is L-shaped, with an anti-expansion wheel installed at its end. The output end of the geared motor has an externally threaded rod, and the wheel seat has a precision internally threaded hole machined at the corresponding position. The thread fit clearance between the externally threaded rod and the precision internally threaded hole is 0.05mm-0.1mm. The top surface of the first bushing-type mounting block has two sets of symmetrically distributed cylindrical pin positioning holes. The wheel seat has an oblong groove corresponding to the tail of the anti-expansion wheel, and the fit clearance between the cylindrical pin and the groove is 0.2mm-0.5mm.

[0008] The anti-expansion wheel has a bearing inside, and the inner ring of the bearing is fixed to the end of the wheel seat; the surface of the anti-expansion wheel is covered with an elastic material.

[0009] The paper-cutting execution component includes at least one set of blade drive cylinders and matching cutters; the blade drive cylinder is a double-acting linear cylinder; the cutter is located at the end of the piston rod of the linear cylinder, and the protruding end of the cutter is provided with an arc-shaped guide surface; the connecting beam body has a wedge-shaped guide hole corresponding to the cutter stroke path, and the inner wall of the guide hole is fitted with a polymer wear-resistant bushing. The blade drive cylinder is connected to a second bushing mounting block via fasteners, and the second bushing mounting block is connected to the bearing shaft via fasteners.

[0010] A high-pressure pneumatic pipeline is arranged parallel to the bearing shaft axis, and the end of the high-pressure pneumatic pipeline is connected to the pneumatic circuit of the blade drive cylinder through a quick-change connector.

[0011] The surface of the bearing shaft has grooves along the axial direction, and the high-pressure pneumatic pipeline is arranged in the grooves.

[0012] The spacing distribution of the paper-cutting actuator and the anti-stretching wheel assembly satisfies L=n×(d1+d2)+k, where L is the effective length of the bearing shaft, d1 is the axial dimension of the paper-cutting actuator, d2 is the axial dimension of the anti-stretching wheel assembly, n is the number of paper-cutting actuators and anti-stretching wheel assemblies, and k is the safety distance correction coefficient, with a value range of 3mm-5mm.

[0013] The beneficial effects of this utility model are: This invention overcomes the technical challenges of traditional structures' single function and low space utilization by integrating the paper-cutting actuator, anti-stretching wheel assembly, and connecting beam body into a single unit. The composite connection structure of split pressure blocks and shock-absorbing rubber layers reduces vibration amplitude under high-speed conditions; the modular installation design allows for quick replacement of the paper-cutting blade, reducing maintenance costs; and the parameterized adaptation mechanism supports rapid modification of long-shaft models, compressing the equipment's lateral dimensions. This solves the technical problem of traditional connecting beams only providing basic support, requiring independent installation of components such as the paper-cutting blade and anti-stretching wheel, resulting in a dispersed structure and large space occupation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connecting beam of the present invention used in a roll-to-roll offset printing machine; Figure 2 yes Figure 1 Top view; Figure 3 yes Figure 2 A-direction view; Figure 4 yes Figure 2 View from direction B; Figure 5 yes Figure 2 View from C.

[0015] In the figure, 1. Connecting beam body, 2. Anti-expansion wheel, 3. Wheel seat, 4. Gear motor, 5. Motor mounting base, 6. First bushing type mounting block, 7. Bearing shaft, 8. Blade drive cylinder, 9. Second bushing type mounting block, 10. Main pressure block, 11. Secondary pressure block. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Example 1 like Figure 1-5 As shown, the connecting beam for a web offset printing machine disclosed in this embodiment includes a connecting beam body 1, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body 1 is laterally fixed between the transmission surface wall plate and the operating surface wall plate by fasteners. An axial mounting cavity is provided through the connecting beam body 1. At least one bearing shaft 7 is provided in the axial mounting cavity. The bearing shaft 7 is fixedly and detachably connected to the connecting beam body 1 by a split-type pressure block. The paper-cutting actuator and the anti-stretching wheel assembly are distributed axially along the bearing shaft 7 and are radially connected to the bearing shaft 7 by a bushing-type mounting block.

[0018] In this embodiment, a modular layout is achieved through the axial mounting cavity of the bearing shaft 7, facilitating the detachable installation and adjustment of components. The connecting beam body 1 is laterally fixed between the transmission surface and the operating surface wall panel, serving as a rigid support foundation for the overall structure. The paper-cutting actuator is used to quickly cut the paper; the anti-stretching wheel assembly provides support and prevents deformation by contacting the paper surface. All functional components are radially connected through the bearing shaft 7, and flexible distribution is achieved using bushing-type mounting blocks. In this embodiment, the bearing shaft 7 serves multiple purposes, solving the problem of the traditional connecting beam having a single function and reducing the space occupied by additional components. The paper-cutting actuator and the anti-stretching wheel assembly can be flexibly arranged along the bearing shaft 7 to adapt to the needs of different printing presses (e.g., the shaft length determines the number of components). The connecting beam body 1 and the wall panel form a rigid frame, effectively suppressing vibration and deformation during high-speed operation.

[0019] Example 2 The connecting beam for a web offset printing machine disclosed in this embodiment includes a connecting beam body 1, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body 1 is laterally fixed between the transmission surface wall plate and the operating surface wall plate by fasteners. An axial mounting cavity is provided through the connecting beam body 1. At least one bearing shaft 7 is provided in the axial mounting cavity. The bearing shaft 7 is detachably fixed to the side wall of the connecting beam body 1 by a split-type pressure block assembly. The paper-cutting actuator includes at least one set of blade drive cylinders 8 and matching blades. The anti-stretching wheel assembly includes a reduction motor 4, a wheel seat 3, and an anti-stretching wheel 2. The paper-cutting actuator and the anti-stretching wheel assembly are distributed axially along the bearing shaft 7 and are radially connected to the bearing shaft 7 by a bushing-type mounting block assembly. The split-type pressure block assembly includes a main pressure block 10 and a secondary pressure block 11. The secondary pressure block 11 is fixed to the inner wall of the connecting beam body 1 by countersunk bolts. The main pressure block 10 and the secondary pressure block 11 form an adjustable clamping gap by stepped bolts. A shock-absorbing rubber pad is provided in the clamping gap. The mating clamping surfaces of the main pressure block 10 and the secondary pressure block 11 are provided with arc-shaped grooves that match the outer diameter of the bearing shaft 7.

[0020] In this embodiment, the bearing shaft 7 is detachably fixed and has a shock absorption function through a split-type pressure block assembly (main pressure block 10 + auxiliary pressure block 11). The main pressure block 10 and auxiliary pressure block 11 adjust the clamping gap through stepped bolts, and the clamping surface is designed as an arc-shaped groove that matches the bearing shaft 7. The shock-absorbing rubber pad buffers the impact of vibration on the bearing shaft 7. The rubber pad absorbs equipment vibration and protects the stability of the bearing shaft 7, the paper-cutting actuator, and the anti-stretching wheel assembly. The split-type pressure block facilitates disassembly, maintenance, or replacement of the bearing shaft. The arc-shaped groove ensures a tight fit between the clamping surface and the shaft, preventing the shaft from loosening.

[0021] Example 3 The connecting beam for a web offset printing machine disclosed in this embodiment includes a connecting beam body 1, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body 1 is laterally fixed between the transmission surface wall plate and the operating surface wall plate by fasteners. An axial mounting cavity is provided through the connecting beam body 1. At least one bearing shaft 7 is provided in the axial mounting cavity. The bearing shaft 7 is detachably fixed to the side wall of the connecting beam body 1 by a split-type pressure block assembly. The paper-cutting actuator includes at least one set of blade drive cylinders 8 and matching blades. The anti-stretching wheel assembly includes a reduction motor 4, a wheel seat 3, and an anti-stretching wheel 2. The paper-cutting actuator and the anti-stretching wheel assembly are distributed axially along the bearing shaft 7 and are radially connected to the bearing shaft 7 by a bushing-type mounting block assembly. The anti-stretch wheel assembly includes a first bushing mounting block 6, a reduction motor 4, a wheel seat 3, and an anti-stretch wheel 2. The first bushing mounting block 6 is fixed to the bearing shaft 7 by fasteners. The side wall of the first bushing mounting block 6 is connected to a motor mounting seat 5 by fasteners. The reduction motor 4 is mounted on the motor mounting seat 5. The wheel seat 3 is L-shaped, with the anti-stretch wheel 2 mounted at its end. The output end of the reduction motor 4 is provided with an external threaded rod. The wheel seat 3 is machined with a precision internal threaded hole at the corresponding position. The thread fit clearance between the external threaded rod and the precision internal threaded hole is 0.05mm-0.1mm. The top surface of the first bushing mounting block 6 is provided with two sets of symmetrically distributed cylindrical pin positioning holes. The tail of the wheel seat 3 opposite to the anti-stretch wheel 2 is provided with an oblong groove. The fit clearance between the cylindrical pin and the groove is 0.2mm-0.5mm.

[0022] In this embodiment, the precision threaded drive and limiting design of the anti-stretch wheel assembly ensures accurate movement of the wheel seat 3 and the anti-stretch wheel 2. The external threaded rod at the output end of the geared motor 4 engages with the internal threaded hole of the wheel seat, driving the wheel seat 3 to move axially through threaded rotation. The cylindrical pin and the sliding groove restrict the rotational freedom of the wheel seat 3, allowing only axial displacement. The minute thread clearance ensures precise control of the anti-stretch wheel support height. The cylindrical pin and the sliding groove engage to restrict the rotation of the wheel seat 3, ensuring the vertical movement of the anti-stretch wheel 2.

[0023] Example 4 This embodiment discloses a connecting beam for a web offset printing machine, comprising a connecting beam body 1, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body 1 is laterally fixed between the transmission surface wall panel and the operating surface wall panel by fasteners. An axial mounting cavity is provided through the connecting beam body 1. At least one bearing shaft 7 is provided in the axial mounting cavity, and the bearing shaft 7 is detachably fixed to the side wall of the connecting beam body 1 by a split-type pressure block assembly. The paper-cutting actuator includes at least one set of blade drive cylinders 8 and matching blades. The anti-stretching wheel assembly includes a reduction motor 4, a wheel seat 3, and an anti-stretching wheel 2. The paper-cutting actuator and the anti-stretching wheel assembly are axially spaced along the bearing shaft 7, and are radially connected to the bearing shaft 7 by a bushing-type mounting block assembly. The anti-stretching wheel 2 has a bearing inside, and the inner ring of the bearing is fixed to the end of the wheel seat 3. The surface of the anti-stretching wheel 2 is covered with an elastic material.

[0024] In this embodiment, the surface of the anti-swelling roller 2 is covered with an elastic material to reduce damage to the paper. The elastic material (such as rubber) supports the paper through friction while preventing scratches on the paper surface. The elastic contact surface reduces the risk of paper surface damage and can adapt to changes in paper thickness.

[0025] Example 5 The connecting beam for a web offset printing machine disclosed in this embodiment includes a connecting beam body 1, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body 1 is laterally fixed between the transmission surface wall plate and the operating surface wall plate by fasteners. An axial mounting cavity is provided through the connecting beam body 1. At least one bearing shaft 7 is provided in the axial mounting cavity. The bearing shaft 7 is detachably fixed to the side wall of the connecting beam body 1 by a split-type pressure block assembly. The paper-cutting actuator includes at least one set of blade drive cylinders 8 and matching blades. The anti-stretching wheel assembly includes a reduction motor 4, a wheel seat 3, and an anti-stretching wheel 2. The paper-cutting actuator and the anti-stretching wheel assembly are distributed axially along the bearing shaft 7 and are radially connected to the bearing shaft 7 by a bushing-type mounting block assembly. The paper-cutting execution component includes at least one set of blade drive cylinders 8 and matching cutters; the blade drive cylinder 8 is a double-acting linear cylinder; the cutter is located at the end of the piston rod of the linear cylinder, and the protruding end of the cutter is provided with an arc-shaped guide surface; the connecting beam body 1 has a wedge-shaped guide hole corresponding to the cutter stroke path, and the inner wall of the guide hole is fitted with a polymer wear-resistant bushing; the blade drive cylinder 8 is connected to a second bushing type mounting block 9 by fasteners, and the second bushing type mounting block 9 is connected to the bearing shaft 7 by fasteners.

[0026] In this embodiment, the wear-resistant design of the blade drive cylinder 8 and the guide hole ensures rapid blade extension and retraction. A double-acting linear cylinder drives the blade movement, and a high-polymer wear-resistant bushing (such as nylon or PTFE) embedded in the wedge-shaped guide hole reduces friction. The linear cylinder provides rapid response to meet the demands of high-speed printing. The polymer bushing extends the life of the guide hole and reduces maintenance frequency.

[0027] Furthermore, a high-pressure pneumatic pipeline is arranged parallel to the axial direction of the bearing shaft 7, and the end of the high-pressure pneumatic pipeline is connected to the pneumatic circuit of the blade drive cylinder 8 through a quick-change connector.

[0028] The surface of the bearing shaft 7 has a groove along the axial direction, and the high-pressure pneumatic pipeline is arranged in the groove.

[0029] In this embodiment, the high-pressure pneumatic pipeline is integrated into the groove of the bearing shaft 7, providing a stable air source for the blade drive cylinder 8. The pneumatic pipeline is laid along the groove of the bearing shaft 7 and connected to the blade drive cylinder 8 via a quick-connect coupling, avoiding interference from external pipelines. The groove layout saves external space and keeps the structure neat. The centralized air supply system ensures that multiple sets of blade drive cylinders 8 operate synchronously.

[0030] Example 6 The connecting beam for a web offset printing machine disclosed in this embodiment includes a connecting beam body 1, a paper-cutting actuator, and an anti-stretching wheel assembly. The connecting beam body 1 is laterally fixed between the transmission surface wall plate and the operating surface wall plate by fasteners. An axial mounting cavity is provided through the connecting beam body 1. At least one bearing shaft 7 is provided in the axial mounting cavity. The bearing shaft 7 is detachably fixed to the side wall of the connecting beam body 1 by a split-type pressure block assembly. The paper-cutting actuator includes at least one set of blade drive cylinders 8 and matching blades. The anti-stretching wheel assembly includes a reduction motor 4, a wheel seat 3, and an anti-stretching wheel 2. The paper-cutting actuator and the anti-stretching wheel assembly are distributed axially along the bearing shaft 7 and are radially connected to the bearing shaft 7 by a bushing-type mounting block assembly. The spacing distribution of the paper-cutting actuator and the anti-stretching wheel assembly satisfies L=n×(d1+d2)+k, where L is the effective length of the bearing shaft 7, d1 is the axial dimension of the paper-cutting actuator, d2 is the axial dimension of the anti-stretching wheel assembly, n is the number of the paper-cutting actuator and the anti-stretching wheel assembly, and k is the safety distance correction coefficient, with a value range of 3mm-5mm.

[0031] In this embodiment, the number and spacing of the paper-cutting actuator and the anti-stretching roller assembly are determined by a formulaic interval distribution. A safety spacing correction coefficient avoids interference between the paper-cutting actuator and the anti-stretching roller assembly, while also accommodating different shaft length requirements. The formulaic design ensures a reasonable spacing between the paper-cutting actuator and the anti-stretching roller assembly, balancing functionality and safety. The n-value is adjusted to adapt to different printing press specifications.

[0032] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connecting beam for a web offset printing machine, characterized in that It includes a connecting beam body (1), a paper-cutting actuator and an anti-stretching wheel assembly; the connecting beam body (1) is horizontally fixed between the transmission surface wall panel and the operating surface wall panel by fasteners, and an axial mounting cavity is provided through the connecting beam body (1); at least one bearing shaft (7) is provided in the axial mounting cavity, and the bearing shaft (7) is fixedly and detachably connected to the connecting beam body (1) by a split pressure block; the paper-cutting actuator and the anti-stretching wheel assembly are distributed axially along the bearing shaft (7), and the paper-cutting actuator and the anti-stretching wheel assembly are radially connected to the bearing shaft (7) by a bushing type mounting block.

2. The connecting beam for a web offset printing machine according to claim 1, characterized in that, The split-type pressure block assembly includes a main pressure block (10) and a secondary pressure block (11). The secondary pressure block (11) is fixed to the inner wall of the connecting beam body (1) by countersunk bolts. The main pressure block (10) and the secondary pressure block (11) form an adjustable clamping gap by stepped bolts. A shock-absorbing rubber pad is provided in the clamping gap. The mating clamping surfaces of the main pressure block (10) and the secondary pressure block (11) are provided with an arc-shaped groove that matches the outer diameter of the bearing shaft (7).

3. The connecting beam for a web offset printing machine according to claim 1, characterized in that, The anti-expansion wheel assembly includes a first bushing mounting block (6), a geared motor (4), a wheel seat (3), and an anti-expansion wheel (2). The first bushing mounting block (6) is fixed to the bearing shaft (7) by fasteners. The side wall of the first bushing mounting block (6) is connected to a motor mounting seat (5) by fasteners. The geared motor (4) is mounted on the motor mounting seat (5). The wheel seat (3) is L-shaped and has an anti-expansion wheel (2) installed at its end. The output end of the geared motor (4) is provided with an external threaded rod. The wheel seat (3) is machined with a precision internal threaded hole at the corresponding position. The thread fit clearance between the external threaded rod and the precision internal threaded hole is 0.05mm-0.1mm. The top surface of the first bushing mounting block (6) is provided with two sets of symmetrically distributed cylindrical pin positioning holes. The tail of the wheel seat (3) away from the anti-expansion wheel (2) is provided with an elongated groove. The fit clearance between the cylindrical pin and the groove is 0.2mm-0.5mm.

4. The connecting beam for a web offset printing machine according to claim 3, characterized in that, The anti-expansion wheel (2) is equipped with a bearing inside, and the inner ring of the bearing is fixed to the end of the wheel seat (3); the surface of the anti-expansion wheel (2) is covered with an elastic material.

5. The connecting beam for a web offset printing machine according to claim 1, characterized in that, The paper-cutting execution component includes at least one set of blade drive cylinders (8) and matching cutters; the blade drive cylinder (8) adopts a double-acting linear cylinder; the cutter is set at the end of the piston rod of the linear cylinder, and the protruding end of the cutter is provided with an arc-shaped guide surface; the connecting beam body (1) is provided with a wedge-shaped guide hole corresponding to the cutter stroke path, and the inner wall of the guide hole is fitted with a polymer wear-resistant bushing. Among them, the blade drive cylinder (8) is connected to the second bushing type mounting block (9) by fasteners, and the second bushing type mounting block (9) is connected to the bearing shaft (7) by fasteners.

6. The connecting beam for a web offset printing machine according to claim 5, characterized in that, A high-pressure pneumatic pipeline is arranged parallel to the axial direction of the bearing shaft (7), and the end of the high-pressure pneumatic pipeline is connected to the pneumatic circuit of the blade drive cylinder (8) through a quick-change connector.

7. A connecting beam for a web offset printing machine according to claim 6, characterized in that, The surface of the bearing shaft (7) has a groove along the axial direction, and the high-pressure pneumatic pipeline is arranged in the groove.

8. The connecting beam for a web offset printing machine according to claim 1, characterized in that, The spacing distribution of the paper-cutting actuator and the anti-stretching wheel assembly satisfies L=n×(d1+d2)+k, where L is the effective length of the bearing shaft (7), d1 is the axial dimension of the paper-cutting actuator, d2 is the axial dimension of the anti-stretching wheel assembly, n is the number of the paper-cutting actuator and the anti-stretching wheel assembly, and k is the safety distance correction coefficient, with a value range of 3mm-5mm.

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