A pressure roller device of a slitting machine

Abstract

This utility model discloses a pressure roller device for a slitting machine, aiming to provide a pressure roller device that can prevent the pressure roller swing arms from axially moving along the swing arm shaft, thereby effectively solving the problem in the prior art where the pressure roller swing arms of the slitting machine move axially along the swing arm shaft, affecting the winding quality of the film material. It includes a swing arm support, a pair of pressure roller swing arms, and swing arm mounting structures corresponding to each pressure roller swing arm. A pressure roller is rotatably mounted between the pair of pressure roller swing arms. The swing arm mounting structure includes: a swing arm shaft, mounted on the swing arm support, with the pressure roller swing arms rotatably mounted on the corresponding swing arm shaft, and the pressure roller swing arms can slide along the swing arm shaft; a swing arm limiting part, fixedly mounted on the swing arm support; and a pre-tensioning spring, with the swing arm limiting part and the pre-tensioning spring located on opposite sides of the pressure roller swing arms, and the pressure roller swing arms abutting against the swing arm limiting part under the action of the pre-tensioning spring.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine technology, and specifically to a pressure roller device for a slitting machine. Background Technology

[0002] A slitting machine is a device that cuts wide-width film material into multiple narrow-width film materials. During operation, the slitting machine uses a winding structure to wind the slit film material. To improve the winding quality, the slitting machine typically includes a pressure roller device. The winding structure generally includes two winding arms, a winding core rotatably positioned between the two arms, and a winding motor that drives the winding core. The pressure roller device includes a rotating pressure roller arm, a cylinder that drives the pressure roller arm, and a pressure roller rotatably mounted on the pressure roller arm. During operation, the winding structure, driven by the winding motor, rotates the winding core, winding the slit film material onto it. The cylinder in the pressure roller device drives the pressure roller arm to rotate, causing the pressure roller to press against the film material on the winding core, providing winding pressure to remove air from the film material and prevent bulging or other defects. For example, Chinese Patent Publication No. CN210456793U, the invention is entitled "Slitting Machine Rewinding Arm and Unwinding Arm Upward Moving Mechanism", which includes a frame, a rewinding arm, an unwinding arm, two upward moving devices corresponding one-to-one with the rewinding arm and the unwinding arm, and a pressing device with pressure rollers.

[0003] Currently, the pressure roller arms of slitting machines are typically mounted on the machine frame via a swing arm shaft. A bushing is mounted on the pressure roller arm, and a set screw is installed on the bushing. The swing arm shaft passes through the bushing, and the bushing is fixed in its designated position by the set screw. However, current pressure roller devices in slitting machines have the following drawbacks: During operation, the pressure roller, under the action of the cylinder and the pressure roller arm, presses against the film material on the take-up core. As the take-up core rotates, the pressure roller vibrates continuously, which can easily cause the set screw to loosen. This results in the pressure roller arm moving axially along the swing arm shaft, affecting the film material winding quality. Utility Model Content

[0004] The purpose of this invention is to provide a pressure roller device for a slitting machine that can prevent the pressure roller arm from moving axially along the arm shaft, thereby effectively solving the problem that the pressure roller device of the existing slitting machine has the problem of the pressure roller arm moving axially along the arm shaft, which affects the winding quality of the film material.

[0005] The technical solution of this utility model is: A pressure roller device for a slitting machine includes a swing arm support, a pair of pressure roller swing arms, and swing arm mounting structures corresponding to the pressure roller swing arms. Pressure rollers are rotatably mounted between the pair of pressure roller swing arms. The swing arm mounting structures include: The swing arm shaft is located on the swing arm support, and the pressure roller swing arm is rotatably mounted on the corresponding swing arm shaft, and the pressure roller swing arm can slide along the swing arm shaft; The swing arm limiting part is fixedly installed on the swing arm support; The pre-tension spring and the swing arm limiting part are located on opposite sides of the pressure roller swing arm, and the pressure roller swing arm abuts against the swing arm limiting part under the action of the pre-tension spring. Compared with the existing technology in the slitting machine where the bushing on the pressure roller swing arm is locked and fixed to the swing arm shaft by a set screw, which is prone to loosening due to pressure roller vibration, causing the pressure roller swing arm to move axially along the swing arm shaft and affecting the winding quality of the film material, the pressure roller swing arm of the slitting machine in this solution abuts against the fixed swing arm limiting part under the action of the pre-tension spring. The pressure roller swing arm is limited by the cooperation of the pre-tension spring and the swing arm limiting part. On the one hand, it can effectively prevent the pressure roller swing arm from moving axially. On the other hand, the pre-tension spring can absorb the vibration energy of the pressure roller, thereby reducing the vibration of the pressure roller, improving the stability of the winding pressure of the pressure roller on the film material of the winding core, which is conducive to better removing air in the film material and improving the winding quality of the film material.

[0006] Preferably, the device also includes a swing arm cylinder. The pressure roller swing arm is L-shaped and includes a vertical swing arm and a horizontal swing arm. A shaft hole is provided at the junction of the vertical swing arm and the horizontal swing arm. The swing arm shaft passes through the shaft hole of the corresponding pressure roller swing arm so that the pressure roller swing arm is rotatably mounted on the corresponding swing arm shaft. The pressure roller is rotatably mounted on the upper end of the vertical swing arm of a pair of pressure roller swing arms. The swing arm cylinder extends vertically. One end of the swing arm cylinder is hinged to the swing arm support, and the other end of the swing arm cylinder is hinged to the horizontal swing arm. The pressure roller swing arm in this design is L-shaped, with the vertical swing arm extending vertically and the horizontal swing arm extending horizontally. The swing arm cylinders are distributed vertically. In this way, on the one hand, the vertical space can be used to install the swing arm cylinders, effectively reducing the space occupied by them in the horizontal direction and improving their structural compactness in the horizontal direction. On the other hand, most of the weight of the pressure roller will act on the swing arm support through the swing arm shaft, and the swing arm cylinder does not need to overcome the weight of the pressure roller. This is conducive to improving the control accuracy of the winding pressure of the swing arm cylinder on the film material of the winding core through the pressure roller swing arm and the pressure roller.

[0007] Preferably, the length of the vertical swing arm is greater than the length of the horizontal swing arm. This solution reduces the length of the horizontal swing arm, making the lever arm of the pressure roller greater than that of the swing arm cylinder. This reduces the impact on the winding pressure of the pressure roller when the working pressure of the cylinder fluctuates or the lever arm of the pressure roller changes, thereby improving the control accuracy of the winding pressure exerted by the swing arm cylinder on the film material of the winding core through the pressure roller swing arm and the pressure roller.

[0008] Preferably, the swing arm cylinder corresponds one-to-one with the pressure roller swing arm, and the swing arm cylinder drives the corresponding pressure roller swing arm to rotate. A bearing is installed in the shaft hole, and the swing arm shaft passes through the inner hole of the bearing. By installing a bearing in the shaft hole, the flexibility between the swing arm shaft and the pressure roller swing arm can be improved, and friction can be reduced.

[0009] Preferably, both ends of the pressure roller are rotatably mounted on corresponding pressure roller swing arms via self-aligning bearings. This utilizes the self-aligning bearings' automatic self-aligning property, which compensates for errors caused by misalignment and shaft deflection. During the slitting machine's operation, this ensures the pressure roller is tightly pressed against the surface of the film material on the take-up core, better removing air from the film material and improving the film material winding quality. It also effectively prevents partial suspension of the pressure roller on the take-up core, such as one end of the pressure roller resting on the film material while the other end is suspended, thus affecting the film material winding quality.

[0010] Preferably, a pair of pressure roller swing arms are located between the swing arm limiting parts of the swing arm mounting structure corresponding to the pair of pressure roller swing arms, and the preload spring of the swing arm mounting structure corresponding to the pair of pressure roller swing arms is located between the pair of pressure roller swing arms.

[0011] Preferably, the swing arm mounting structure also includes a nylon or plastic gasket located between the swing arm limiting part and the pressure roller swing arm. The gasket is pressed between the pressure roller swing arm and the swing arm limiting part by a preload spring. This prevents direct contact between the pressure roller swing arm and the swing arm limiting part during rotation, protecting these parts (which are typically made of metal). Furthermore, the orientation of the pressure roller swing arm can be adjusted by replacing the gasket.

[0012] Preferably, the pressure roller swing arm is mounted on a bolted bearing housing, and the swing arm shaft passes through the pressure roller swing arm and the bearing housing. This effectively improves the stability of the pressure roller swing arm rotating around the swing arm shaft.

[0013] Preferably, the system also includes a frame with a transverse guide rail parallel to the axial direction of the pressure roller. The pressure roller is detachably mounted between a pair of pressure roller swing arms. Each swing arm support corresponds to one of the pressure roller swing arms and is slidably mounted on the transverse guide rail. Each swing arm support is equipped with a locking device that locks the swing arm support onto the frame. This allows the pressure roller to be installed, disassembled, or replaced by moving the pair of pressure roller swing arms apart or closer together, accommodating the needs of winding film materials of different widths.

[0014] Preferably, the locking device includes a set bolt on the swing arm support. Thus, the position of the swing arm support can be locked using the set bolt, resulting in a simple structure and convenient operation.

[0015] The beneficial effects of this utility model are: Firstly, the pressure roller swing arm is pressed against the fixed swing arm limiting part under the action of the pre-tension spring. The pressure roller swing arm is limited by the cooperation of the pre-tension spring and the swing arm limiting part. On the one hand, it can effectively prevent the axial movement of the pressure roller swing arm; on the other hand, the pre-tension spring can absorb the vibration energy of the pressure roller, thereby reducing the vibration of the pressure roller and improving the stability of the winding pressure of the pressure roller on the film material of the take-up core. This is conducive to better removing air from the film material and improving the winding quality of the film material.

[0016] Secondly, on the one hand, the vertical space can be used to install the swing arm cylinder, effectively reducing the space it occupies in the horizontal direction and improving its structural compactness in the horizontal direction; on the other hand, most of the weight of the pressure roller will act on the swing arm support through the swing arm shaft, and the swing arm cylinder does not need to overcome the weight of the pressure roller, which is conducive to improving the control accuracy of the winding pressure of the swing arm cylinder on the film material of the winding core through the pressure roller swing arm and the pressure roller.

[0017] Third, by reducing the length of the transverse swing arm, the lever arm of the pressure roller is made greater than that of the swing arm cylinder. This reduces the impact on the winding pressure of the pressure roller when the working pressure of the cylinder fluctuates or the lever arm of the pressure roller changes. This helps to improve the control accuracy of the winding pressure of the swing arm cylinder on the film material of the winding core through the action of the pressure roller swing arm and the pressure roller. Attached Figure Description

[0018] Figure 1 This is a front view of the pressure roller device of a slitting machine according to the present invention.

[0019] Figure 2 This is a side view of the pressure roller device of a slitting machine according to the present invention.

[0020] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle.

[0021] In the picture: Swing arm support 1; Pressure roller swing arm 2, vertical swing arm 2.1, horizontal swing arm 2.2, bearing seat 2.3; The swing arm mounting structure 3, the swing arm shaft 3.1, the preload spring 3.2, the swing arm limiting part 3.3, and the gasket 3.4; Pressure roller 4; 5.05 swing arm cylinder; Self-aligning bearing 6; Horizontal guide rail 7; Locking device 8. Detailed Implementation

[0022] Specific Implementation Example 1, such as Figure 1 , Figure 2 , Figure 3 As shown, a pressure roller device for a slitting machine includes a swing arm support 1, a pressure roller 4, a swing arm cylinder 5, a pair of pressure roller swing arms 2, and a swing arm mounting structure 3 corresponding to each pressure roller swing arm 2. In this text, a pair of pressure roller swing arms 2 refers to two pressure roller swing arms 2.

[0023] The pressure roller 4 is rotatably positioned between a pair of pressure roller swing arms 2.

[0024] The swing arm mounting structure 3 includes a swing arm shaft 3.1, a swing arm limiting part 3.3, and a preload spring 3.2. The swing arm shaft 3.1 is mounted on the swing arm support 1. The pressure roller swing arm 2 is rotatably mounted on the corresponding swing arm shaft 3.1, and the pressure roller swing arm 2 can slide along the swing arm shaft 3.1. The rotation axis of the pressure roller 4 is parallel to the swing arm shaft 3.1. The swing arm shafts 3.1 of the swing arm mounting structure 3 corresponding to the two pressure roller swing arms 2 are coaxially distributed. The swing arm limiting part 3.3 is fixedly mounted on the swing arm support 1. The swing arm limiting part 3.3 and the preload spring 3.2 are located on opposite sides of the pressure roller swing arm 2, and the pressure roller swing arm 2 abuts against the swing arm limiting part 3.3 under the action of the preload spring 3.2.

[0025] The swing arm cylinder 5 drives the pressure roller swing arm 2 to rotate around the swing arm shaft 3.1.

[0026] The specific operation of the pressure roller device of the slitting machine in this embodiment is as follows: During the operation of the slitting machine, the slitting film material is wound onto the take-up core; the swing arm cylinder 5 drives the pressure roller swing arm 2 to rotate, so that the pressure roller 4 presses against the film material of the take-up core, providing winding pressure to remove air from the film material and avoid bulging and other defects.

[0027] Compared to existing slitting machines where the bushing on the pressure roller arm 2 is locked to the swing arm shaft 3.1 by a set screw, which is prone to loosening due to pressure roller 4 vibration, causing the pressure roller arm 2 to move axially along the swing arm shaft 3.1 and affecting the film material winding quality, the pressure roller arm 2 of the slitting machine in this embodiment is pressed against the fixed swing arm limiting part 3.3 by a pre-tension spring 3.2. The pre-tension spring 3.2 and the swing arm limiting part 3.3 work together to limit the pressure roller arm 2, which can effectively prevent the pressure roller arm 2 from moving axially. On the other hand, the pre-tension spring 3.2 can also absorb the vibration energy of the pressure roller 4, thereby reducing the vibration of the pressure roller 4, improving the stability of the winding pressure of the pressure roller 4 on the film material of the winding core, which is conducive to better removing air from the film material and improving the film material winding quality.

[0028] Specific embodiment two, such as Figure 1 , Figure 2 , Figure 3As shown, a pressure roller device for a slitting machine includes a swing arm support 1, a pressure roller 4, a swing arm cylinder 5, a pair of pressure roller swing arms 2, and a swing arm mounting structure 3 corresponding to each pressure roller swing arm 2. In this text, a pair of pressure roller swing arms 2 refers to two pressure roller swing arms 2.

[0029] The pressure roller 4 is rotatably positioned between a pair of pressure roller swing arms 2.

[0030] The swing arm mounting structure 3 includes a swing arm shaft 3.1, a swing arm limiting part 3.3, and a preload spring 3.2. The swing arm shaft 3.1 is mounted on the swing arm support 1. The pressure roller swing arm 2 is rotatably mounted on the corresponding swing arm shaft 3.1, and the pressure roller swing arm 2 can slide along the swing arm shaft 3.1. The rotation axis of the pressure roller 4 is parallel to the swing arm shaft 3.1. The swing arm shafts 3.1 of the swing arm mounting structure 3 corresponding to the two pressure roller swing arms 2 are coaxially distributed. The swing arm limiting part 3.3 is fixedly mounted on the swing arm support 1. The swing arm limiting part 3.3 and the preload spring 3.2 are located on opposite sides of the pressure roller swing arm 2, and the pressure roller swing arm 2 abuts against the swing arm limiting part 3.3 under the action of the preload spring 3.2.

[0031] In one implementation, such as Figure 1 , Figure 3 As shown, a pair of pressure roller swing arms 2 are located between the swing arm limiting portions 3.3 of the swing arm mounting structures 3 corresponding to the pair of pressure roller swing arms 2, that is, the two pressure roller swing arms 2 are located between the swing arm limiting portions 3.3 of the two swing arm mounting structures 3. The preload spring 3.2 of the swing arm mounting structure 3 corresponding to the pair of pressure roller swing arms 2 is located between the pair of pressure roller swing arms 2, that is, the preload spring 3.2 of the two swing arm mounting structures 3 is located between the two pressure roller swing arms 2.

[0032] In another embodiment, the arm limiting part 3.3 of each arm mounting structure 3 is located on the same side of the corresponding pressure roller arm 2, and the preload spring 3.2 of each arm mounting structure 3 is located on the same side of the corresponding pressure roller arm 2; for example, the arm limiting part 3.3 of each arm mounting structure 3 is located on the right side of the corresponding pressure roller arm 2, and the preload spring 3.2 of each arm mounting structure 3 is located on the left side of the corresponding pressure roller arm 2; or the arm limiting part 3.3 of each arm mounting structure 3 is located on the left side of the corresponding pressure roller arm 2, and the preload spring 3.2 of each arm mounting structure 3 is located on the right side of the corresponding pressure roller arm 2.

[0033] The swing arm cylinder 5 drives the pressure roller swing arm 2 to rotate around the swing arm shaft 3.1.

[0034] In one example, the swing arm cylinder 5 corresponds one-to-one with the pressure roller swing arm 2, and the swing arm cylinder 5 drives the corresponding pressure roller swing arm 2 to rotate. When the pressure roller device is working, the swing arm cylinders 5 corresponding to a pair of pressure roller swing arms 2 work simultaneously, driving a pair of pressure roller swing arms 2 to rotate synchronously, thereby causing the pressure roller 4 to swing.

[0035] In one example, there is one swing arm cylinder 5, which drives one of the pressure roller swing arms 2 to rotate. When the pressure roller device is working, the swing arm cylinder 5 operates, driving one of the pressure roller swing arms 2 to rotate, thereby causing the pressure roller 4 to swing.

[0036] The specific operation of the pressure roller device of the slitting machine in this embodiment is as follows: During the operation of the slitting machine, the slitting film material is wound onto the take-up core; the swing arm cylinder 5 drives the pressure roller swing arm 2 to rotate, so that the pressure roller 4 presses against the film material of the take-up core, providing winding pressure to remove air from the film material and avoid bulging and other defects.

[0037] Compared to existing slitting machines where the bushing on the pressure roller arm 2 is locked to the swing arm shaft 3.1 by a set screw, which is prone to loosening due to pressure roller 4 vibration, causing the pressure roller arm 2 to move axially along the swing arm shaft 3.1 and affecting the film material winding quality, the pressure roller arm 2 of the slitting machine in this embodiment is pressed against the fixed swing arm limiting part 3.3 by a pre-tension spring 3.2. The pre-tension spring 3.2 and the swing arm limiting part 3.3 work together to limit the pressure roller arm 2, which can effectively prevent the pressure roller arm 2 from moving axially. On the other hand, the pre-tension spring 3.2 can also absorb the vibration energy of the pressure roller 4, thereby reducing the vibration of the pressure roller 4, improving the stability of the winding pressure of the pressure roller 4 on the film material of the winding core, which is conducive to better removing air from the film material and improving the film material winding quality.

[0038] Specifically, such as Figure 1 , Figure 2 As shown, a pressure roller device for a slitting machine also includes a frame. A transverse guide rail 7 is provided on the frame. The transverse guide rail 7 is horizontally distributed and parallel to the axial direction of the pressure roller 4. A swing arm support 1 corresponds one-to-one with a pressure roller swing arm 2. The swing arm support 1 is slidably mounted on the transverse guide rail 7. The swing arm support 1 is equipped with a locking device 8, which locks the swing arm support 1 onto the frame. The pressure roller 4 is detachably mounted between a pair of pressure roller swing arms 2. Both ends of the pressure roller 4 are rotatably mounted on their corresponding pressure roller swing arms 2 via bearings. Thus, the pressure roller 4 can be installed, disassembled, or replaced by moving the pair of pressure roller swing arms 2 apart or closer together to accommodate the winding needs of film materials of different widths.

[0039] The locking device 8 includes a set bolt on the swing arm support 1. In this way, the position of the swing arm support 1 can be locked by the set bolt. It has a simple structure and is easy to operate.

[0040] In one example, the swing arm support 1 is manually slidable on the transverse guide rail 7.

[0041] In another example, the swing arm support 1 is driven to slide by an automatic actuator, which is a linear module or an electric cylinder, or a rack parallel to the transverse guide rail 7 is set on the frame. The swing arm support 1 is equipped with a gear that meshes with the rack and a motor that drives the gear. The motor drives the gear to rotate, thereby causing the swing arm support 1 to slide along the transverse guide rail 7.

[0042] In this embodiment, the top of the swing arm support 1 is provided with two upwardly extending support arms, which are parallel to each other. The swing arm shaft 3.1 is located between the two support arms of the swing arm support 1. The pressure roller swing arm 2 is located between the two support arms, one of which constitutes the swing arm limiting part 3.3, and the preload spring 3.2 is located between the pressure roller swing arm 2 and the other support arm.

[0043] Furthermore, such as Figure 2 As shown, the pressure roller swing arm 2 is L-shaped and includes a vertical swing arm 2.1 and a horizontal swing arm 2.2. The vertical swing arm 2.1 extends vertically. The vertical swing arm 2.1 and the horizontal swing arm 2.2 are integrally formed. A shaft hole is provided at the junction of the vertical swing arm 2.1 and the horizontal swing arm 2.2. The swing arm shaft 3.1 passes through the shaft hole of the corresponding pressure roller swing arm 2, so that the pressure roller swing arm 2 is rotatably mounted on the corresponding swing arm shaft 3.1. The pressure roller 4 is rotatably mounted on the upper end of the vertical swing arm 2.1 of the pair of pressure roller swing arms 2. The swing arm cylinder 5 extends vertically, with one end of the swing arm cylinder 5 hinged to the swing arm support 1 and the other end of the swing arm cylinder 5 hinged to the horizontal swing arm 2.2. In this embodiment, the pressure roller swing arm 2 is L-shaped, with the vertical swing arm 2.1 extending vertically and the horizontal swing arm 2.2 extending horizontally. The swing arm cylinder 5 is distributed vertically. In this way, on the one hand, the vertical space can be used to install the swing arm cylinder 5, effectively reducing the space it occupies in the horizontal direction and improving its structural compactness in the horizontal direction. On the other hand, most of the weight of the pressure roller 4 will be applied to the swing arm support 1 through the swing arm shaft 3.1. The swing arm cylinder 5 does not need to overcome the weight of the pressure roller 4, which is conducive to improving the control accuracy of the winding pressure of the swing arm cylinder 5 on the film material of the winding core through the pressure roller swing arm 2 and the pressure roller 4.

[0044] Furthermore, such as Figure 2 As shown, the length of the vertical swing arm 2.1 is greater than the length of the horizontal swing arm 2.2. In this embodiment, the length of the vertical swing arm 2.1 is more than twice the length of the horizontal swing arm 2.2. By reducing the length of the horizontal swing arm 2.2, this embodiment makes the lever arm of the pressure roller 4 greater than the lever arm of the swing arm cylinder 5. This reduces the impact on the winding pressure of the pressure roller 4 when the working pressure of the cylinder fluctuates or the lever arm of the pressure roller 4 changes. This helps to improve the control accuracy of the winding pressure exerted by the swing arm cylinder 5 on the film material of the winding core through the pressure roller swing arm 2 and the pressure roller 4.

[0045] Furthermore, a bearing is installed inside the shaft hole, and the swing arm shaft 3.1 passes through the inner hole of the bearing. By installing a bearing inside the shaft hole, the flexibility between the swing arm shaft 3.1 and the pressure roller swing arm 2 can be improved, and the friction can be reduced.

[0046] Furthermore, such as Figure 1 , Figure 3 As shown, the pressure roller swing arm 2 is mounted on a bolted bearing seat 2.3, with the inner hole of the bearing seat 2.3 coaxially distributed with the shaft hole. The swing arm shaft 3.1 passes through the pressure roller swing arm 2 and the bearing seat 2.3. This effectively improves the stability of the pressure roller swing arm 2 rotating around the swing arm shaft 3.1.

[0047] Furthermore, such as Figure 1 , Figure 2 As shown, both ends of the pressure roller 4 are rotatably mounted on the corresponding pressure roller swing arms 2 via self-aligning bearings 6. This utilizes the self-aligning bearings 6's automatic self-aligning properties to compensate for errors caused by misalignment and shaft deflection. During the slitting machine's operation, this ensures that the pressure roller 4 can tightly press against the surface of the film material on the take-up core, better removing air from the film material and improving the film material's winding quality. It also effectively prevents the pressure roller 4 from being partially suspended when it rests against the film material on the take-up core, for example, one end of the pressure roller 4 resting against the film material on the take-up core while the other end is suspended, thus affecting the film material's winding quality.

[0048] Furthermore, such as Figure 3 As shown, the swing arm mounting structure 3 also includes a nylon or plastic gasket 3.4. The gasket 3.4 is located between the swing arm limiting part 3.3 and the pressure roller swing arm 2. In this embodiment, the gasket 3.4 is sleeved on the swing arm shaft 3.1. The gasket 3.4 and the preload spring 3.2 are located on opposite sides of the pressure roller swing arm 2. Under the action of the preload spring 3.2, the gasket 3.4 is pressed between the pressure roller swing arm 2 and the swing arm limiting part 3.3. Thus, during the rotation of the pressure roller swing arm 2, direct contact between the pressure roller swing arm 2 and the swing arm limiting part 3.3 can be avoided, which helps protect the pressure roller swing arm 2 and the swing arm limiting part 3.3 (which are generally made of metal). Simultaneously, the orientation of the pressure roller swing arm 2 can be adjusted by replacing the gasket 3.4.

[0049] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A pressure roller device for a slitting machine, characterized in that, It includes a swing arm support, a pair of pressure roller swing arms, and a swing arm mounting structure corresponding to each pressure roller swing arm. A pressure roller is rotatably mounted between the pair of pressure roller swing arms. The swing arm mounting structure includes: The swing arm shaft is located on the swing arm support, and the pressure roller swing arm is rotatably mounted on the corresponding swing arm shaft, and the pressure roller swing arm can slide along the swing arm shaft; The swing arm limiting part is fixedly installed on the swing arm support; The preload spring and the swing arm limiting part are located on opposite sides of the pressure roller swing arm, and the pressure roller swing arm abuts against the swing arm limiting part under the action of the preload spring.

2. The pressure roller device of a slitting machine according to claim 1, characterized in that, It also includes a swing arm cylinder. The pressure roller swing arm is L-shaped and includes a vertical swing arm and a horizontal swing arm. A shaft hole is provided at the junction of the vertical swing arm and the horizontal swing arm. The swing arm shaft passes through the shaft hole of the corresponding pressure roller swing arm so that the pressure roller swing arm is rotatably mounted on the corresponding swing arm shaft. The pressure roller is rotatably mounted on the upper end of the vertical swing arm of a pair of pressure roller swing arms. The swing arm cylinder is distributed vertically. One end of the swing arm cylinder is hinged to the swing arm support, and the other end of the swing arm cylinder is hinged to the horizontal swing arm.

3. The pressure roller device of a slitting machine according to claim 2, characterized in that, The length of the vertical swing arm is greater than the length of the horizontal swing arm.

4. The pressure roller device of a slitting machine according to claim 2 or 3, characterized in that: The swing arm cylinder corresponds one-to-one with the pressure roller swing arm. The swing arm cylinder drives the corresponding pressure roller swing arm to rotate. The shaft hole is equipped with a bearing, and the swing arm shaft passes through the inner hole of the bearing.

5. A pressure roller device for a slitting machine according to claim 1, 2, or 3, characterized in that: The two ends of the pressure roller are respectively rotatably mounted on the corresponding pressure roller swing arms via self-aligning bearings.

6. The pressure roller device of a slitting machine according to claim 5, characterized in that: A pair of pressure roller swing arms are located between the swing arm limiting parts of the swing arm mounting structure corresponding to the pair of pressure roller swing arms, and the preload spring of the swing arm mounting structure corresponding to the pair of pressure roller swing arms is located between the pair of pressure roller swing arms.

7. A pressure roller device for a slitting machine according to claim 1, 2, or 3, characterized in that: The swing arm mounting structure also includes a nylon or plastic gasket, which is located between the swing arm limiting part and the pressure roller swing arm. The gasket is pressed between the pressure roller swing arm and the swing arm limiting part under the action of the pre-tightening spring.

8. A pressure roller device for a slitting machine according to claim 1, 2, or 3, characterized in that, The pressure roller swing arm is mounted on a bearing seat that is bolted together, and the swing arm shaft passes through the pressure roller swing arm and the bearing seat.

9. A pressure roller device for a slitting machine according to claim 1, 2, or 3, characterized in that, It also includes a frame with a transverse guide rail that is parallel to the axial direction of the pressure roller. The pressure roller is detachably mounted between a pair of pressure roller swing arms. The swing arm support corresponds to the pressure roller swing arm. The swing arm support is slidably mounted on the transverse guide rail. The swing arm support is equipped with a locking device that locks the swing arm support onto the frame.

10. The pressure roller device of a slitting machine according to claim 9, characterized in that, The locking device includes a set bolt located on the swing arm support.

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