Buffering device for a float roller swing arm

Abstract

The utility model relates to the technical field of buffer adjustment for floating roller swing arm, specifically buffer adjustment device for floating roller swing arm, including frame, swing arm subassembly, floating roller, buffer subassembly, adjustment subassembly, through the adjustment screw drive spring seat lift, change buffer spring precompression, realize the continuous adjustment of buffer force, adapt to different material tension demand, material pass rate promotion, buffer spring and damper synergistic effect, vibration attenuation rate promotion, high -frequency vibration amplitude reduces to, avoid material surface scratch or wrinkle, angle limit stop and rubber buffer pad limit swing arm maximum swing angle, prevent excessive swing collision, real -time display swing state with ruler and pointer, convenient for monitoring, need not to dismantle part just can through hand wheel adjustment buffer force, single -time adjustment time shortens to 5 minutes within, compared with traditional device promotion, pure mechanical structure has no electrical element, copper bush bearing and dust cover reduce abrasion.

Description

Technical Field

[0001] This utility model relates to the field of buffer adjustment technology for floating roller swing arms, specifically a buffer adjustment device for floating roller swing arms. Background Technology

[0002] As is well known, in the continuous conveying production of flexible materials such as films and paper, the floating roller swing arm is a key component for maintaining the stability of material tension. The floating roller contacts the material surface and swings with the tension to buffer fluctuations.

[0003] Traditional floating roller swing arm buffer adjustment devices have the following drawbacks: they rely on springs with fixed stiffness to provide buffering, which cannot adapt to the tension requirements of materials with different thicknesses and materials. For example, the difference in buffering force between film and thick cardboard can be as high as 50%, which can easily lead to material stretching deformation or wrinkling. With only a single spring for buffering, the vibration attenuation rate is less than 30%. High-frequency vibration can easily make the contact between the floating roller and the material unstable, resulting in scratches or sudden tension changes. They lack an angle limiting structure, and excessive swing of the swing arm can easily collide with other parts of the equipment, causing material breakage or equipment damage. Adjusting the buffering parameters requires disassembling and replacing the spring, which is cumbersome and takes more than 30 minutes for a single adjustment, affecting the continuity of production. Summary of the Invention

[0004] In order to overcome the problems of existing buffer adjustment devices for floating roller swing arms, such as unadjustable buffering force, insufficient vibration absorption, uncontrolled swing range, and slow adjustment response, this utility model provides a buffer adjustment device for floating roller swing arms with adjustable buffering force, sufficient vibration absorption, controllable swing range, and fast adjustment response.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a buffer adjustment device for a floating roller swing arm, comprising:

[0006] The frame is a vertical frame structure, which is vertically fixed next to the conveying equipment;

[0007] A swing arm assembly, comprising a swing arm body and a hinge seat, the hinge seat being fixed in the middle of the frame, one end of the swing arm body being hinged to the hinge seat via a hinge shaft, the axis of the hinge shaft being set in the horizontal direction, and the swing arm body being able to swing around the hinge shaft in a vertical plane.

[0008] A floating roller is horizontally positioned at the end of the swing arm body away from the hinge axis. The axis of the floating roller is parallel to the axis of the hinge axis, and both ends of the roller are rotatably connected to the swing arm body through bearings.

[0009] A buffer assembly, disposed between the swing arm body and the frame, includes a buffer spring and a damper. One end of the buffer spring is connected to the middle of the swing arm body, and the damper is arranged parallel to the buffer spring, with its two ends respectively hinged to the swing arm body and the frame; and

[0010] The adjustment assembly includes an adjustment screw and a spring seat. The spring seat is slidably mounted on the vertical guide rail of the frame. The adjustment screw passes vertically through the top of the frame and is threadedly connected to the spring seat. The end of the buffer spring away from the swing arm body is fixed to the spring seat.

[0011] Preferably, the swing arm body is a rigid rod-shaped structure with its length direction perpendicular to the axis of the hinge shaft. A reinforcing rib is provided at one end of the swing arm body near the floating roller. The reinforcing rib is welded perpendicularly to the swing arm body, and the end is fixedly connected to the bearing seat of the floating roller.

[0012] Furthermore, the buffer spring of the buffer assembly is a cylindrical helical spring with its axis parallel to the swing plane of the swing arm body. The two ends of the spring are connected to the spring lug and spring seat of the swing arm body respectively through hooks.

[0013] The damper is a hydraulic damper. The cylinder end is hinged to the damping support of the frame, and the piston rod end is hinged to the damping lug of the swing arm body. The axis of the hinge is parallel to the axis of the hinge of the swing arm body.

[0014] Furthermore, the vertical guide rail of the adjustment component is set along the height direction of the frame, and the cross-section is T-shaped. The spring seat is a T-shaped slider that is adapted to the guide rail. The slider and the guide rail are fitted with a clearance, and the sliding direction is consistent with the length direction of the guide rail.

[0015] The adjusting screw has a rotating handwheel on its side. The plane of the handwheel is perpendicular to the axis of the adjusting screw. The bottom of the screw is connected to the spring seat by a thread. Rotating the handwheel can drive the spring seat to move along the guide rail.

[0016] In a further embodiment, the surface of the floating roller is covered with an elastic rubber layer, and annular guide grooves are uniformly opened on the surface of the rubber layer along the axial direction. The grooves are parallel to the axis of the floating roller, and dust covers are provided on the outer side of the bearing seats at both ends of the floating roller. The covers are bolted to the bearing seats.

[0017] Based on the aforementioned scheme, a copper bushing bearing is fitted on the hinge shaft of the swing arm body. The outer ring of the bearing is interference-fitted with the hinge seat, and the inner ring is clearance-fitted with the hinge shaft. Limiting retaining rings are provided at both ends of the hinge shaft. The plane of the retaining rings is perpendicular to the axis of the hinge shaft to prevent the swing arm body from moving axially.

[0018] Furthermore, based on the aforementioned solution, the frame is provided with an angle limiting plate, which is located on the upper and lower sides of the swing trajectory of the swing arm body. The plate surface is perpendicular to the swing plane of the swing arm body, and a rubber buffer pad is provided on the limiting plate, with the pad surface parallel to the side of the swing arm body.

[0019] Furthermore, based on the aforementioned scheme, the swing arm body is provided with a scale, the length direction of the scale is consistent with the length direction of the swing arm body, and a pointer is provided at the corresponding position on the frame, with the tip of the pointer pointing to the scale to indicate the swing angle of the swing arm.

[0020] The bottom of the frame is equipped with leveling feet, the axis of which is perpendicular to the bottom surface of the frame, and the top of which is threaded to the frame to ensure that the frame is installed vertically.

[0021] Beneficial effects

[0022] This floating roller swing arm uses a buffer adjustment device. By adjusting the screw to drive the spring seat to rise and fall, the pre-compression of the buffer spring is changed, achieving continuous adjustment of the buffer force to adapt to the tension requirements of different materials, thus improving the material qualification rate. The buffer spring and damper work together to improve the vibration attenuation rate and reduce the high-frequency vibration amplitude, avoiding scratches or wrinkles on the material surface. Angle limit plates and rubber buffer pads limit the maximum swing angle of the swing arm to prevent excessive swing and collision. At the same time, the scale and pointer display the swing status in real time for easy monitoring. The buffer force can be adjusted by handwheel without disassembling parts, and the adjustment time is shortened to less than 5 minutes, which is an improvement over traditional devices. The pure mechanical structure has no electrical components. Copper bushings and dust covers reduce wear. Key components are made of high-strength alloy materials, extending the service life to twice that of traditional devices and reducing maintenance costs. Attached Figure Description

[0023] Figure 1 This is a side view of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the swing arm body of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the floating roller of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the buffer spring of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the limiting plate of this utility model;

[0028] Figure 6 This utility model Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0029] In the diagram: 1. Frame; 2. Swing arm assembly; 3. Swing arm body; 4. Hinge seat; 5. Floating roller; 6. Buffer assembly; 7. Buffer spring; 8. Damper; 9. Adjustment assembly; 10. Adjustment screw; 11. Spring seat; 12. Reinforcing rib; 13. Guide rail; 14. Rotary handwheel; 15. Rubber layer; 16. Flow guide groove; 17. Dust cover; 18. Copper bushing bearing; 19. Limiting ring; 20. Limiting plate; 21. Rubber buffer pad; 22. Scale; 23. Pointer; 24. Adjusting foot. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] See Figures 1-6 A buffer adjustment device for a floating roller swing arm, through the synergistic design of "rigid support + elastic buffer + damping vibration reduction + precise adjustment", achieves stable tension control and vibration buffering during the conveying process of flexible materials (such as film and paper). The core solution is as follows: the frame 1 serves as a vertical base frame, supporting the swing arm assembly 2 to swing in a vertical plane around the hinge axis. The floating roller 5 at the end of the swing arm contacts the material surface and swings with the tension. The spring of the buffer assembly 6 provides elastic buffering, the damper 8 attenuates vibration, and the adjustment assembly 9 drives the spring seat 11 to rise and fall through the screw, changing the spring preload to adapt to the tension requirements of different materials. The components are closely coordinated through hinges, sliding, bolt fixing and other methods, which solves the problems of non-adjustable buffering force, insufficient vibration absorption and uncontrolled swinging in traditional devices. It is suitable for continuous conveying production lines of flexible materials such as film, paper and fabric.

[0032] First, refer to Figure 1 In this embodiment, the frame 1 is a vertical frame structure, welded from Q235 steel plate, and vertically fixed to the ground next to the conveying equipment by expansion bolts. Horizontal adjustment feet 24 are installed at the four corners of the bottom. Rotating the adjustment feet 24 can adjust the level of the frame 1 to ensure the overall structure is stable (without tilting or shaking). A hinge seat 4 (cut from steel plate) is welded in the middle of the frame 1 to provide a rotation fulcrum for the swing arm assembly 2. An adjustment screw 10 mounting hole (threaded hole, vertically penetrating the crossbeam of the frame 1) is reserved at the top. A vertical guide rail 13 (T-shaped section, ground) is welded along the height direction on the side to provide guidance for the sliding of the spring seat 11. A damping support (triangular reinforced structure) is welded at the bottom for installing the damper 8 cylinder body.

[0033] The frame 1 serves as the supporting foundation for the entire device. Its rigid design can withstand the gravity and material tension of the swing arm and floating roller 5, while providing a reference positioning for other components to ensure the parallelism and perpendicularity of each motion axis.

[0034] Then, refer to Figure 2In this embodiment, the swing arm assembly 2 is the core transmission structure connecting the floating roller 5 and the frame 1, realizing the swing buffer of the floating roller 5. The swing arm body 3 is a rectangular steel tube (material Q345B), with its length direction perpendicular to the axis of the hinge shaft. One end is hinged to the hinge seat 4 of the frame 1 through the hinge shaft. A copper bushing bearing 18 is sleeved on the shaft (the outer ring is interference-fitted with the hinge seat 4, and the inner ring is clearance-fitted with the hinge shaft) to ensure that the swing arm can swing flexibly around the shaft in the vertical plane. Limiting retaining rings 19 (steel plates) are welded to both ends of the hinge shaft. The plane of the retaining ring is perpendicular to the axis of the hinge shaft to prevent the swing arm body 3 from moving axially.

[0035] A reinforcing rib 12 (a triangular steel plate, perpendicular to the swing arm body 3) is welded to one end of the swing arm body 3 near the floating roller 5 to enhance the rigidity of the swing arm end and prevent the floating roller 5 from bending and deforming under force. A bearing seat (made of cast steel) is welded to the end of the reinforcing rib 12 to install the bearing of the floating roller 5. The axis of the bearing seat is parallel to the axis of the hinge shaft to ensure that the floating roller 5 rotates smoothly.

[0036] A scale 22 (made of aluminum alloy, with the same length direction as the swing arm body 3) is attached to the side of the swing arm body 3 to indicate the swing angle. A pointer 23 (stainless steel sheet) is welded to the corresponding position on the frame 1. The tip of the pointer 23 points to the scale, which allows for direct observation of the swing arm's swing amplitude and facilitates monitoring of the material tension.

[0037] Secondly, see Figure 3 In this embodiment, the floating roller 5 is a component that is in direct contact with the flexible material. It absorbs the tension fluctuations of the material by rotating and swinging. The floating roller 5 is a seamless steel pipe (chrome-plated on the surface), which is horizontally set at the end of the swing arm body 3. Its axis is parallel to the axis of the hinge shaft. The two ends of the roller shaft are connected to the bearing seats of the swing arm through deep groove ball bearings (the inner ring of the bearing is interference-fitted with the roller shaft, and the outer ring is clearance-fitted with the bearing seat), which ensures that the floating roller 5 can rotate freely and reduces friction damage to the material.

[0038] The surface of the floating roller 5 is covered with an elastic rubber layer 15. The surface of the rubber layer 15 has uniformly opened annular guide grooves 16 (with a U-shaped cross-section) along the axial direction. The grooves are parallel to the axis of the floating roller 5, which can reduce the contact area between the material and the floating roller 5, reduce the risk of adhesion, and guide water vapor or impurities on the surface of the material to be discharged along the grooves. The outer side of the bearing seats at both ends of the floating roller 5 is fixed with a dust cover 17 (stamped steel plate) by bolts. A rubber sealing ring is installed between the cover and the bearing seat to prevent dust and water vapor from entering the bearing and extend its service life.

[0039] The elastic rubber layer 15 has a certain deformation capacity, which can adapt to slight changes in material thickness and avoid material indentation or tensile deformation caused by rigid contact. The annular guide groove 16 enhances the air permeability of the surface of the floating roller 5 and prevents the material from generating electrostatic adsorption due to long-term contact.

[0040] Again, see Figure 4In this embodiment, the buffer assembly 6 is located between the swing arm body 3 and the frame 1, providing elastic buffering and vibration attenuation. It is the core of stabilizing tension. The buffer spring 7 is a cylindrical helical spring with its axis parallel to the swing plane of the swing arm body 3. One end is connected to the spring lug (welded steel plate) in the middle of the swing arm body 3 through a hook, and the other end is connected to the spring seat 11 of the adjustment assembly 9 through a hook. The spring is in a pre-compressed state in its natural state, providing initial tension for the swing arm. When the floating roller 5 is pushed by the material tension, the spring is further compressed or extended to absorb tension fluctuations.

[0041] The damper 8 is a hydraulic damper 8 (the cylinder body is made of seamless steel pipe), which is set parallel to the buffer spring 7. The end of the cylinder body is hinged to the damping support of the frame 1 through a pin, and the end of the piston rod is hinged to the damping lug (welded steel plate) of the swing arm body 3 through a pin. The axis of the hinge is parallel to the axis of the hinge of the swing arm body 3, ensuring that the damper 8 has no additional torque when the swing arm swings. The damper 8 attenuates the vibration of the swing arm through the viscous resistance of the hydraulic oil, avoiding the sudden change of material tension caused by high frequency resonance.

[0042] The buffer spring 7 provides elastic restoring force, ensuring that the floating roller 5 is always in contact with the material surface, while the damper 8 consumes vibration energy and quickly stabilizes the position of the swing arm. Together, they reduce the material tension fluctuation range to within ±5%, ensuring smooth material conveying.

[0043] In addition, see Figure 4 In this embodiment, the adjusting component 9 is used to adjust the preload of the buffer spring 7 to adapt to the tension requirements of different materials. The adjusting screw 10 is a trapezoidal threaded screw that vertically passes through the threaded hole at the top of the frame 1. The bottom is connected to the spring seat 11 by a thread. The spring seat 11 is a T-shaped slider (made of cast iron) that is clearance-fitted with the T-shaped vertical guide rail 13 of the frame 1 and can slide along the length of the guide rail 13. The guide rail 13 has a T-shaped cross section to prevent the spring seat 11 from detaching from the guide rail 13 when sliding.

[0044] A rotating handwheel 14 (a circular steel plate with anti-slip texture on the edge) is welded to the top of the adjusting screw 10. The plane of the handwheel is perpendicular to the axis of the adjusting screw 10, which is convenient for the operator to rotate manually. When the handwheel is rotated, the screw drives the spring seat 11 to rise and fall along the guide rail 13 through the thread (rotating the handwheel clockwise lowers the spring seat 11 and increases the spring precompression, and rotating it counterclockwise raises the spring seat 11 and decreases the precompression), so as to realize the continuous adjustment of the buffer force.

[0045] The initial compression of the buffer spring 7 is changed by adjusting the position of the spring seat 11, thereby changing the initial tension of the swing arm. This adapts to materials of different thicknesses and materials (such as films requiring less buffering force and thick cardboard requiring more buffering force). The adjustment can be completed without disassembling the spring, making it easy to operate.

[0046] In addition, see Figure 5In this embodiment, the limiting component prevents the swing arm from swinging excessively and causing a collision, thus protecting the materials and equipment. An angle limiting plate 20 (steel plate) is welded on the frame 1 and located on the upper and lower sides of the swing trajectory of the swing arm body 3. The plate surface is perpendicular to the swing plane of the swing arm body 3, limiting the maximum swing angle of the swing arm. A rubber buffer pad 21 is pasted on the side of the limiting plate 20 facing the swing arm. The pad surface is parallel to the side of the swing arm body 3. When the swing arm swings to the limit position, the rubber pad contacts the side of the swing arm and absorbs the impact energy through elastic deformation, avoiding rigid collision.

[0047] The hinge shaft copper bushing bearing 18 of the swing arm body 3 is lubricated with grease (lithium-based grease) to reduce wear. The dust cover 17 of the floating roller 5 bearing seat and the piston rod surface of the damper 8 are all treated with anti-corrosion treatment (galvanized or painted) to adapt to the humid or dusty environment of the workshop and extend the service life of the equipment.

[0048] In addition, see Figure 5 In this embodiment, the floating roller 5 contacts the material surface. When the material tension increases, it pushes the floating roller 5 to swing upward. The swing arm body 3 rotates around the hinge axis, compressing the buffer spring 7 and the piston rod of the damper 8. The spring stores elastic potential energy, and the damper 8 attenuates the vibration through hydraulic resistance. When the tension decreases, the spring releases energy, pushing the swing arm to swing downward. The floating roller 5 remains in contact with the material, and the damper 8 also attenuates the reverse vibration. The two work together to make the floating roller 5 swing smoothly with the change of tension without violent impact.

[0049] Rotate the handwheel of the adjusting screw 10 to drive the spring seat 11 to rise and fall along the guide rail 13, changing the pre-compression of the buffer spring 7: the greater the pre-compression, the greater the initial tension of the swing arm, which is suitable for thick and hard materials (such as cardboard); the smaller the pre-compression, the smaller the initial tension, which is suitable for thin and light materials (such as film). The scale and pointer 23 display the swing arm angle in real time, which makes it easy for the operator to adjust the buffer force according to the material condition and ensure the tension is stable.

[0050] When the swing arm swings, the angle limit plate 20 limits the maximum swing range to prevent the swing arm from swinging excessively and colliding with the frame 1 or other equipment. The rubber buffer pad 21 buffers the contact impact between the swing arm and the limit plate 20 to avoid deformation of the swing arm or material breakage. At the same time, the copper bushing bearing 18 and the dust cover 17 reduce the wear of moving parts and ensure the long-term stable operation of the device.

[0051] In addition, see Figure 1 In this embodiment, the tension buffering conditions of the film production line require: film thickness of 0.05-0.1mm, conveying speed of 10-20m / min, and tension fluctuation of ≤±3% to avoid film stretching deformation or wrinkling, while also attenuating the impact of equipment vibration on the film.

[0052] The frame 1 is fixed next to the film conveyor. The horizontal adjustment foot 24 is adjusted to make the frame 1 vertical. The hinge seat 4 and the swing arm body 3 are smoothly hinged without jamming. The surface of the floating roller 5 is covered with a 60A rubber layer 15. The annular guide groove 16 prevents the film from sticking. The dust cover 17 seals the bearing seat to avoid dust pollution. The buffer component 6 adopts a cylindrical helical spring with medium stiffness. The hydraulic damper 8 has a moderate damping coefficient to ensure that the vibration attenuation rate is ≥75%. The adjustment component 9 is initially set with spring pre-compression so that the initial angle of the swing arm is horizontal.

[0053] During film transport, the floating roller 5 lightly touches the film surface. When the conveyor speed fluctuates and the tension increases, the film pushes the floating roller 5 to swing upward. The swing arm compresses the spring and damper 8. The spring absorbs energy, and the damper 8 quickly dampens the vibration. The swing angle of the swing arm is stabilized within +15°, and the tension fluctuation is ≤±2%.

[0054] When the tension decreases, the spring pushes the swing arm to swing downwards, and the damper 8 also dampens the vibration. The swing arm angle is stable within -10°, and the film is free of looseness and wrinkles. When producing films of different thicknesses, the spring pre-compression is adjusted by rotating the handwheel 14: when switching to a 0.1mm thick film, the pre-compression is increased, the initial tension of the swing arm is increased, and the swing angle is controlled within ±10°. When switching to a 0.05mm thick film, the pre-compression is decreased, the swing angle is slightly larger but still stable, and there is no need to replace the spring. Each adjustment takes about 3 minutes. After running continuously for 8 hours, the following is checked: the floating roller 5 rotates smoothly, the rubber layer 15 is unworn, the swing arm swings flexibly, the scale indication is clear, the buffer spring 7 and the damper 8 are normal, and the film surface is free of scratches and wrinkles. The pass rate is 15% higher than that of the traditional device.

[0055] Finally, see Figure 1 In this embodiment, the swing arm body 3 and the frame 1 are made of aluminum alloy, which reduces the weight by 30% and is suitable for lightweight equipment requirements. The rubber layer 15 of the floating roller 5 is changed to silicone rubber, which improves the temperature resistance (-60℃ to 200℃) and is suitable for conveying high-temperature films (such as BOPP film). The buffer spring 7 is changed to a disc spring, which provides greater elasticity under the same compression and is suitable for thick materials (such as cardboard and fabric) that require high buffering force, while reducing the size of the device.

[0056] Working principle:

[0057] The floating roller swing arm uses a buffer adjustment device. When using it, first fix the frame 1 to the side of the conveying equipment with expansion bolts, rotate the horizontal adjustment foot 24 to make the frame 1 vertical (calibrated by a level), install the swing arm body 3 on the hinge seat 4 of the frame 1 through the hinge shaft to ensure flexible swing, install the floating roller 5 on the bearing seat at the end of the swing arm, check whether the floating roller 5 rotates smoothly, connect the buffer spring 7 and the damper 8, and ensure that the hook connection is firm.

[0058] Depending on the type of material being conveyed (e.g., film), turn the handwheel of the adjusting screw 10 to drive the spring seat 11 to descend along the guide rail 13, compressing the buffer spring 7 to the preset preload (observe the initial angle of the swing arm through the scale, usually in a horizontal position), and check whether the swing arm swings smoothly and whether the damper 8 is working properly (no oil leakage or jamming).

[0059] During material conveying, the floating roller 5 contacts the material surface and swings with the changes in material tension. When the material tension increases (such as fluctuations in conveying speed), the material pushes the floating roller 5 to swing upward, and the swing arm body 3 rotates around the hinge axis, compressing the buffer spring 7 and the damper 8. The spring absorbs energy, the damper 8 dampens the vibration, and the swing arm rises slowly to avoid sudden tension changes that could cause material stretching.

[0060] When the material tension decreases, the buffer spring 7 releases energy, pushing the swing arm to swing downwards. The floating roller 5 remains in contact with the material, and the damper 8 dampens the vibration during the descent. The swing arm slowly returns to its original position, preventing the material from loosening and wrinkling.

[0061] Observe the swing angle by comparing the scale on the swing arm with the pointer 23 on the frame 1. If the angle is too large (exceeding ±20°), it indicates that the buffer force is insufficient. The handwheel needs to be turned to increase the spring pre-compression. If the angle is too small, it indicates that the buffer force is too large. The pre-compression needs to be reduced. If high-frequency vibration occurs, check whether the damper 8 is normal. If necessary, replace the damping oil.

[0062] Regularly clean the dust and impurities on the surface of the floating roller 5, check whether the rubber layer 15 is worn, add grease to the copper bushing bearing 18 of the hinge shaft to ensure flexible swing, check whether the buffer spring 7 is deformed or cracked, check whether the damper 8 is leaking oil, and replace damaged parts in time.

[0063] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A buffer adjustment device for a float roller swing arm, characterized by, include: The frame (1) is a vertical frame structure and is vertically fixed next to the conveying equipment; The swing arm assembly (2) includes a swing arm body (3) and a hinge seat (4). The hinge seat (4) is fixed in the middle of the frame (1). One end of the swing arm body (3) is hinged to the hinge seat (4) through a hinge shaft. The axis of the hinge shaft is set in the horizontal direction. The swing arm body (3) can swing around the hinge shaft in the vertical plane. The floating roller (5) is horizontally positioned at one end of the swing arm body (3) away from the hinge axis. The axis of the floating roller (5) is parallel to the axis of the hinge axis. Both ends of the floating roller (5) are rotatably connected to the swing arm body (3) through bearings. A buffer assembly (6) is disposed between the swing arm body (3) and the frame (1), comprising a buffer spring (7) and a damper (8). One end of the buffer spring (7) is connected to the middle of the swing arm body (3), and the damper (8) is arranged parallel to the buffer spring (7), with both ends hinged to the swing arm body (3) and the frame (1) respectively. Adjustment assembly (9) includes adjustment screw (10) and spring seat (11). Spring seat (11) is slidably mounted on vertical guide rail (13) of frame (1). Adjustment screw (10) passes vertically through the top of frame (1) and is threadedly connected to spring seat (11). The end of buffer spring (7) away from swing arm body (3) is fixed to spring seat (11).

2. The damping adjustment device for a float roller swing arm according to claim 1, characterized by The swing arm body (3) is a rigid rod-shaped structure with its length direction perpendicular to the axis of the hinge shaft. The end of the swing arm body (3) near the floating roller (5) is provided with a reinforcing rib (12). The reinforcing rib (12) is welded perpendicularly to the swing arm body (3), and its end is fixedly connected to the bearing seat of the floating roller (5).

3. The damping adjustment device for a float roller swing arm according to claim 2, characterized by The buffer spring (7) of the buffer assembly (6) is a cylindrical helical spring with its axis parallel to the swing plane of the swing arm body (3). The two ends of the buffer spring (7) are connected to the spring lug and spring seat (11) of the swing arm body (3) respectively through hooks. The damper (8) is a hydraulic damper (8). The cylinder end is hinged to the damping support of the frame (1), and the piston rod end is hinged to the damping lug of the swing arm body (3). The axis of the hinge is parallel to the axis of the hinge of the swing arm body (3).

4. The buffer adjustment device for a float roller swing arm according to claim 3, characterized by The vertical guide rail (13) of the adjustment component (9) is set along the height direction of the frame (1), and the cross section is T-shaped. The spring seat (11) is a T-shaped slider that is adapted to the guide rail (13). The spring seat (11) and the guide rail (13) are in clearance fit, and the sliding direction is consistent with the length direction of the guide rail (13). The adjusting screw (10) is provided with a rotating handwheel (14) on its side. The plane of the rotating handwheel (14) is perpendicular to the axis of the adjusting screw (10). The bottom of the adjusting screw (10) is threadedly connected to the spring seat (11). When the rotating handwheel (14) is rotated, the adjusting screw (10) drives the spring seat (11) to move along the guide rail (13).

5. The buffer adjustment device for the floating roller swing arm according to claim 4, characterized in that, The surface of the floating roller (5) is covered with an elastic rubber layer (15). The surface of the rubber layer (15) is uniformly provided with annular guide grooves (16) along the axial direction. The guide grooves (16) are parallel to the axis of the floating roller (5). Dust covers (17) are provided on the outer side of the bearing seats at both ends of the floating roller (5). The covers are bolted to the bearing seats.

6. The buffer adjustment device for the floating roller swing arm according to claim 5, characterized in that, A copper bushing bearing (18) is fitted on the hinge shaft of the swing arm body (3). The outer ring of the copper bushing bearing (18) is interference-fitted with the hinge seat (4), and the inner ring is clearance-fitted with the hinge shaft. Limiting retaining rings (19) are provided at both ends of the hinge shaft. The plane of the retaining ring is perpendicular to the axis of the hinge shaft to prevent the swing arm body (3) from moving axially.

7. The buffer adjustment device for the floating roller swing arm according to claim 6, characterized in that, The frame (1) is provided with an angle limiting plate (20). The limiting plate (20) is located on the upper and lower sides of the swing trajectory of the swing arm body (3). The plate surface is perpendicular to the swing plane of the swing arm body (3). The limiting plate (20) is provided with a rubber buffer pad (21). The pad surface is parallel to the side of the swing arm body (3).

8. The buffer adjustment device for the floating roller swing arm according to claim 7, characterized in that, The swing arm body (3) is provided with a scale (22), the length direction of the scale is consistent with the length direction of the swing arm body (3), and the frame (1) is provided with a pointer (23) at the corresponding position. The tip of the pointer (23) points to the scale, indicating the swing angle of the swing arm. The bottom of the frame (1) is provided with horizontal adjustment feet (24). The axis of the adjustment feet (24) is perpendicular to the bottom surface of the frame (1), and the top is threaded to the frame (1) to ensure that the frame (1) is installed vertically.

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