A kind of unwinding lever and automatic pusher device

Abstract

The application discloses a kind of unwinding lever and automatic pusher, including support frame, unwinding lever assembly and left and right horizontal lever mechanism, the upper portion of left end and right end of support frame is equipped with a set of roller support device, which can slide forward and backward and overturn to the front upper, unwinding lever assembly is horizontally arranged along left and right direction, the outer circle of left end portion of unwinding lever assembly is rotatably connected to the top of roller support device on left side by left shaft positioning structure, the outer circle of right end portion of unwinding lever assembly is rotatably connected to the top of roller support device on right side by right shaft positioning structure, left and right horizontal lever mechanism is arranged on the front side of support frame.The application can prevent the radial jumping of mandrel, axial movement, reduce the wear of mandrel during unwinding, especially high-speed unwinding process, can ensure the stability of tension, after unwinding is completed, empty lever can be automatically pushed forward to roller conveyor, and transported to specified position by roller conveyor, so as to reduce labor intensity.

Description

Technical Field

[0001] This invention belongs to the field of PVC calendered artificial leather production technology, specifically relating to an unwinding bar and an automatic extrusion device. Background Technology

[0002] In the production process of PVC calendered artificial leather products, the product is wound onto the unwinding rod 1 during different processes, until the next unwinding process, such as... Figure 1 As shown, a mandrel 2 is inserted into the unwinding lever body 1. Two support rollers 4, spaced apart, are rotatably mounted on the upper end of the support frame 3. Annular grooves 6 at both ends of the mandrel 2 are rotatably positioned between the two support rollers 4. Under the traction of the rear power section, the mandrel 2 passively rotates, unfolding the artificial leather product. Precision-cast steel heads 5 are welded to both ends of the inner hole of the unwinding lever body 1. The heads 5 have an outer round and inner square structure, with a flared opening at the outer end of the inner hole to facilitate the insertion of the mandrel 2 into the head 5. The portion of the mandrel 2 that mates with the head 5 is also square. The outer square section of the mandrel 2 is clearance-fitted with the inner square hole of the head 5, allowing the mandrel 2 to rotate during the unwinding process. The existing unwinding lever device has the following disadvantages:

[0003] 1) The outer side of the mandrel 2 and the inner square hole of the lever head 5 are clearance fit. Especially after a period of use, the contact section between the inner square hole of the lever head 5 and the outer side of the mandrel 2 will have a larger gap due to wear. During high-speed unwinding, it will jump (the jump of the unwinding lever relative to the mandrel), resulting in unstable unwinding tension. In order to ensure the winding tension in the second half, a manual brake wheel is usually installed on the outside of the support frame 3 on the mandrel 2. After using the brake wheel to increase the tension, the winding can be completed. However, the problem of unstable tension still cannot be solved. If the tension is too small, the winding will be uneven. If the tension is too large, thin and soft products will be stretched narrow.

[0004] 2) To facilitate the removal of the mandrel 2 from the unwinding lever 1 during roll changing, no axial limiting mechanism was provided. This resulted in axial movement between the mandrel 2 and the unwinding lever 1, which further aggravated the wear of the outer section of the mandrel 2 and the inner hole of the lever head 5.

[0005] 3) The spindle 2 is supported on two support rollers 4, which can also cause axial movement.

[0006] 4) After unwinding, the mandrel 2 and the lever body 1 cannot be lifted by the crane and need to be lifted off the production line by manpower, which is labor-intensive and very unsafe. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, the present invention provides an unwinding lever that avoids radial runout and axial movement during the unwinding process, and a device that can automatically push out the unwinding lever without manual operation.

[0008] To solve the above technical problems, the present invention adopts the following technical solution: a winding unwinding bar and an automatic extrusion device, comprising a support frame, a winding unwinding bar assembly, and left and right horizontal delivery mechanisms. The upper part of the left and right ends of the support frame is provided with a set of roller bracket devices that can slide back and forth and flip forward and upward. The winding unwinding bar assembly is horizontally arranged in the left and right directions. The outer circle of the left end of the winding unwinding bar assembly is rotatably connected to the top of the left roller bracket device through a left axial positioning structure. The outer circle of the right end of the winding unwinding bar assembly is rotatably connected to the top of the right roller bracket device through a right axial positioning structure. The left and right horizontal delivery mechanisms are arranged on the upper front side of the support frame.

[0009] The roller bracket devices at both ends of the support frame have the same structure and are arranged symmetrically on the left and right.

[0010] The roller support assembly includes a cylinder, a push-pull rod, a horizontal rail, a sliding frame, a front support wheel, a rear support wheel, a limiting support, and a limiting top rod. The horizontal rail is mounted on the support frame along the front-to-back direction. The bottom of the sliding frame is slidably connected to the horizontal rail. The front and rear support wheels are rotatably connected to the sliding frame. The front and rear support wheels are at the same height and spaced apart. The cylinder, push-pull rod, and limiting top rod are all mounted along the front-to-back direction. The rear end of the cylinder body is mounted on the upper left side of the support frame via a hinge support. The front end of the push-pull rod is fixedly connected to the upper rear side of the sliding frame. The push-pull rod is hinged to the piston rod of the cylinder, and the limit rod is fixedly connected to the lower front of the sliding frame. The push-pull rod is higher than the limit rod in the height direction. The front ends of the limit rods of the two roller bracket devices are connected by a linkage shaft that is horizontally set in the left-right direction. The limit support is fixedly set on the front side of the support frame. The limit support has a semi-circular groove with an open rear side. The semi-circular groove corresponds to the two ends of the linkage shaft. The linkage shaft has an axial positioning block that contacts the right side of the left limit support and the left side of the right limit support.

[0011] The top surface of the support frame is inclined at the rear and at the front, and the top surface of the support frame extends from the rear to the top of the rear support wheel.

[0012] The unwinding lever assembly includes a mandrel, a lever body, and two lever heads. Hollow lever heads are welded to both ends of the inner hole of the lever body. The mandrel is coaxially installed inside the lever body. An annular groove is provided on the outer circle of the left and right ends of the mandrel. A left radial positioning mechanism is provided between the left end of the mandrel and the left lever head, and a right radial positioning mechanism is provided between the right end of the mandrel and the right lever head.

[0013] The two annular grooves have the same structure and are arranged symmetrically from left to right. The bottom of the left annular groove includes the outer circle of the convex arc surface on the left and the outer circle of the cylindrical surface on the right. The outer diameter of the cylindrical surface is smaller than the minimum outer diameter of the outer circle of the convex arc surface.

[0014] The left axial positioning structure is the same as the right axial positioning structure and is symmetrically arranged. The left axial positioning structure includes the concave arc outer circle of the front support wheel and the rear support wheel on the left side and the convex arc outer circle. The convex arc outer circle on the spindle is in rolling connection with the concave arc outer circle of the front support wheel and the rear support wheel.

[0015] The left and right radial positioning mechanisms have identical structures and are symmetrically arranged. The lever heads at both ends have identical structures and are also symmetrically arranged. The left radial positioning mechanism includes a bearing, a locking sleeve, a round nut, and a clamp-type retaining ring. The inner hole of the lever head at the left end, from left to right, consists of a round hole section, a conical section (larger on the left and smaller on the right), and a square hole section. The outer square section on the spindle is clearance-fitted with the square hole section. The clamp-type retaining ring is coaxially mounted on the outer cylindrical surface of the left annular groove. The outer diameter of the bearing is interference-fitted into the round hole section of the lever head. The inner circle of the bearing is a conical bore that is larger on the left and smaller on the right. The adapter sleeve is coaxially mounted on the outer circle of the mandrel on the right side of the clamp-type retaining ring. The adapter sleeve has an expansion joint along the axial direction. The right side of the outer circle of the adapter sleeve is a conical surface that is larger on the left and smaller on the right. The conical surface of the adapter sleeve is coaxially fitted into the conical bore of the inner circle of the bearing. The left side of the outer circle of the adapter sleeve has an external thread. The round nut is threaded onto the external thread on the left side of the adapter sleeve. The left end of the round nut is press-fitted with the right end face of the clamp-type retaining ring. The conical surface of the adapter sleeve is press-fitted with the conical bore of the inner circle of the bearing.

[0016] The left and right horizontal conveying mechanism is a roller conveyor. The roller conveyor includes several rubber rollers arranged at intervals along the left and right direction. The top of the rubber rollers is lower than the top of the front side of the support frame. A rubber pad is laid on the upper part of the frame of the roller conveyor. The vertical cross section of the rubber pad along the front and back direction is grooved. The rear edge of the rubber pad is connected to the front edge of the support frame. The bottom of the rubber pad has a through hole corresponding to each rubber roller. The top of the middle of each rubber roller protrudes upward from the through hole and is located inside the rubber pad.

[0017] A stop bar is rotatably connected to the left side of the left sliding frame and the right side of the right sliding frame via a pin. The distance from the pin to the upper end of the stop bar is less than the distance from the pin to the lower end of the stop bar. A counterweight is provided at the lower end of the stop bar. The stop bar is located in front of the spindle. A limit block is fixed on the support frame. The rear side of the lower end of the stop bar contacts the front side of the limit block.

[0018] Using the above technical solution, the outer circle of the lever head in this invention is machined, and holes are drilled at both ends of the lever body with the outer circle of the lever head as the reference. The two lever heads are installed and welded to the rear end face. Then, the inner circle of the lever head is machined on a lathe to form a circular hole section (shortening the length of the original flared mouth), ensuring the concentricity of the circular hole section relative to the mandrel.

[0019] A round nut is used to press the locking sleeve into the bearing. The conical surface of the outer circle of the locking sleeve is locked to the conical hole of the inner circle of the bearing, which fundamentally eliminates the gap between the square hole section of the lever body and the outer square section of the mandrel. This ensures that the lever body does not jump or move relative to the mandrel during the unwinding process, thus guaranteeing the stability and tension stability during high-speed unwinding.

[0020] The outer circle of the convex arc surface on the mandrel of the axial positioning structure is rolledly connected with the outer circle of the concave arc surface of the front support wheel and the rear support wheel, which has good axial positioning and prevents the mandrel from moving axially relative to the support wheel.

[0021] After the artificial leather product wrapped around the outer circumference of the lever is unwound, the two cylinders on the front and rear sides are activated simultaneously. The piston rods of the two cylinders extend synchronously, driving the sliding frame forward along the horizontal slide rail via the push-pull rod until the linkage shaft at the front end of the limit rod moves into the semi-circular groove of the limit support. Then, the piston rod of the cylinder continues to extend. Since the height of the push-pull rod is higher than that of the limit rod, the drive frame rotates upward about the center line of the linkage shaft, and the sliding frame moves upward and disengages from the horizontal slide rail. As the rear end of the sliding frame rises, the height of the rear support wheel gradually becomes higher than that of the front support wheel. The height of the wheel is adjusted until the convex arc surface on the mandrel presses against the highest point of the concave arc surface of the front support wheel. Then, the sliding frame rotates upward. Under its own weight, the mandrel and lever break through the obstruction of the stop bar and roll forward along the top surface of the sliding frame. They roll forward onto the rubber pads of the left and right horizontal conveying mechanism until they roll onto the rubber rollers. Due to inertia, they continue to roll forward, blocked and buffered by the slope on the front side of the rubber pad, and then roll backward, blocked and buffered by the slope on the rear side of the rubber pad, until they come to a stable stop on the rubber rollers. The roller conveyor is started, and all the rubber rollers rotate synchronously, conveying the mandrel and lever to the left or right to the designated position. Then, the piston rod of the cylinder retracts, and the sliding frame first rotates backward and downward around the linkage shaft as the fulcrum until the sliding frame falls into the horizontal slide. Then, the piston rod of the cylinder continues to retract, pulling the sliding frame backward until the stop bar, which is in a vertical position, contacts the limit block, at which point the cylinder stops working. Then the unwinding boom assembly of the next wound product roll moves along the top surface of the support frame, which is higher at the rear and lower at the front, between the front support roller and the rear support roller to continue the unwinding operation.

[0022] As the product roll is released, the weight decreases, while the mandrel speed increases. To prevent the mandrel from being pulled forward by the product and disengaging from the front and rear support wheels, a stop bar is installed. The lower rear end of the stop bar is restricted by a limiting block, which prevents the mandrel from moving forward and maintains good stability. A counterweight is installed at the lower end of the stop bar. When the sliding frame returns to its original position from top to bottom, the stop bar remains vertical, ensuring that the lower end of the stop bar is always in front of the limiting block and does not touch it.

[0023] In summary, this invention is scientifically sound and structurally simple. It improves upon existing unwinding bar assemblies, preventing radial runout and axial movement of the mandrel during unwinding, especially at high speeds. This not only reduces mandrel wear but also ensures tension stability, improving the quality of artificial leather products. After unwinding, the empty bar can be automatically pushed forward onto a roller conveyor, which then transports the product to a designated position, thereby reducing labor intensity and ensuring safety and reliability. Attached Figure Description

[0024] Figure 1 This is a structural diagram of existing technology;

[0025] Figure 2 This is a left-side view of the invention in the unwinding state;

[0026] Figure 3 This is a left-side view of the invention when the empty lever is being extruded;

[0027] Figure 4 yes Figure 2 Right view of the center scroll bar component;

[0028] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 yes Figure 4 Enlarged view of the middle bar head;

[0030] Figure 7 yes Figure 6 The left view;

[0031] Figure 8 yes Figure 4 A schematic diagram of loosening a round nut;

[0032] Figure 9 This is a breakdown diagram of the roll-up assembly. Detailed Implementation

[0033] like Figures 1-9 As shown, the present invention provides an unwinding lever and automatic extrusion device, including a support frame 7, an unwinding lever assembly 8, and left and right horizontal delivery lever mechanisms 9. The upper part of the left and right ends of the support frame 7 is provided with a set of roller bracket devices that can slide back and forth and flip forward and upward. The unwinding lever assembly 8 is horizontally arranged in the left and right directions. The outer circle of the left end of the unwinding lever assembly 8 is rotatably connected to the top of the left roller bracket device through a left axial positioning structure. The outer circle of the right end of the unwinding lever assembly 8 is rotatably connected to the top of the right roller bracket device through a right axial positioning structure. The left and right horizontal delivery lever mechanisms 9 are arranged on the upper front side of the support frame 7.

[0034] The roller support devices at both ends of the support frame 7 have the same structure and are arranged symmetrically. Each roller support device includes a cylinder 10, a push-pull rod 24, a horizontal rail 25, a sliding frame 26, a front support wheel 27, a rear support wheel 28, a limiting support 29, and a limiting top rod 30. The horizontal rail 25 is set on the support frame 7 in the front-to-back direction. The bottom of the sliding frame 26 is slidably connected to the horizontal rail 25. The front support wheel 27 and the rear support wheel 28 are rotatably connected to the sliding frame 26. The front support wheel 27 and the rear support wheel 28 are at the same height and are spaced apart. The cylinder 10, the push-pull rod 24, and the limiting top rod 30 are all set in the front-to-back direction. The rear end of the cylinder body of the cylinder 10 is set on the upper left side of the support frame 7 through a hinge support 31. The front end of the push-pull rod 24 is fixedly connected to the upper rear side of the sliding frame 26, and the rear end of the push-pull rod 24 is hinged to the front end of the piston rod of the cylinder 10. The rear end of the limiting rod 30 is fixedly connected to the lower front side of the sliding frame 26. The position of the push-pull rod 24 is higher than the limiting rod 30 in the height direction. The front ends of the limiting rods 30 of the two roller bracket devices are connected by a linkage shaft 32 arranged horizontally in the left-right direction. The limiting support 29 is fixedly installed on the front side of the support frame 7. The rear side of the limiting support 29 is provided with a semi-circular groove 33 with an open rear side. The semi-circular groove 33 corresponds to the two ends of the linkage shaft 32. The linkage shaft 32 is provided with an axial positioning block (not shown in the figure) that contacts the right side of the left limiting support 29 and the left side of the right limiting support 29. The axial positioning block can limit the axial position of the linkage shaft 32, prevent the two sliding frames 26 from displacing in the left-right direction, and ensure a good sliding connection with the horizontal track 25.

[0035] The top surface of the support frame 7 is inclined at the rear and lower at the front, extending from the rear to the top of the rear support wheel 28. The bottom of the support frame 7 is equipped with casters 41 for easy movement, allowing adjustment of the support frame 7's left and right position on the production line.

[0036] The unwinding lever assembly 8 includes a spindle 2, a lever body 1, and two lever heads 5. Hollow lever heads 5 are welded to both ends of the inner hole of the lever body 1. The spindle 2 is coaxially installed inside the lever body 1. An annular groove 6 is provided on the outer circle of the left and right ends of the spindle 2. The left end of the spindle 2 is rotatably connected between the front support wheel 27 and the rear support wheel 28 of the left sliding frame 26 through a left axial positioning structure. The right end of the spindle 2 is rotatably connected between the front support wheel 27 and the rear support wheel 28 of the right sliding frame 26 through a right axial positioning structure. A left radial positioning mechanism is provided between the left end of the spindle 2 and the left lever head 5, and a right radial positioning mechanism is provided between the right end of the spindle 2 and the right lever head 5.

[0037] The two annular grooves 6 have the same structure and are arranged symmetrically on the left and right. The bottom of the left annular groove 6 includes the outer circle 11 of the convex arc surface on the left and the outer circle 12 of the cylindrical surface on the right. The outer diameter of the outer circle 12 of the cylindrical surface is smaller than the minimum outer diameter of the outer circle 11 of the convex arc surface.

[0038] The left axial positioning structure is the same as the right axial positioning structure and is symmetrically arranged. The left axial positioning structure includes the concave arc outer circle 13 of the left front support wheel 27 and the rear support wheel 28 and the convex arc outer circle 11. The convex arc outer circle 11 on the spindle is in rolling connection with the concave arc outer circle 13 of the front support wheel 27 and the rear support wheel 28.

[0039] The left radial positioning mechanism and the right radial positioning mechanism have the same structure and are symmetrically arranged. The lever heads 5 at both ends have the same structure and are symmetrically arranged. The left radial positioning mechanism includes a bearing 14, a locking sleeve 15, a round nut 16, and a clamp-type retaining ring 17. The inner hole of the lever head 5 at the left end is, from left to right, a round hole section 18, a conical section 19 (larger on the left and smaller on the right), and a square hole section 20. The outer square section on the spindle 2 is clearance-fitted with the square hole section 20. The clamp-type retaining ring 17 is coaxially mounted on the outer cylindrical surface 12 of the left annular groove 6. The outer diameter of the bearing 14 is interference-fitted into the round hole section 18 of the lever head 5. The inner diameter of the bearing 14 is... The left side is larger than the right side of the conical hole 21. The locking sleeve 15 is coaxially installed on the outer circle of the mandrel 2 on the right side of the clamp-type retaining ring 17. The locking sleeve 15 has an expansion joint 22 along the axial direction. The right side of the outer circle of the locking sleeve 15 is a conical surface 23 with the left side larger than the right side. The conical surface 23 of the locking sleeve 15 is coaxially fitted into the conical hole 21 in the inner circle of the bearing 14. The left side of the outer circle of the locking sleeve 15 is an external thread. The round nut 16 is threaded onto the external thread on the left side of the locking sleeve 15. The left end of the round nut 16 is press-fitted with the right end face of the clamp-type retaining ring 17. The conical surface 23 of the locking sleeve 15 is press-fitted with the conical hole 21 in the inner circle of the bearing 14.

[0040] The left and right horizontal conveying mechanism 9 is a roller conveyor. The roller conveyor includes several rubber rollers 38 arranged at intervals in the left and right direction. The top of the rubber rollers 38 is lower than the top of the front side of the support frame 7. A rubber pad 39 is laid on the upper part of the frame of the roller conveyor. The vertical cross section of the rubber pad 39 in the front and back direction is grooved. The rear edge of the rubber pad 39 is connected to the front edge of the support frame 7. The bottom of the rubber pad 39 has a through hole corresponding to each rubber roller 38. The top of the middle of each rubber roller 38 protrudes upward from the through hole and is located inside the rubber pad 39.

[0041] A stop bar 36 is rotatably connected to the left side of the left sliding frame 26 and the right side of the right sliding frame 26 via a pin. The distance from the pin to the upper end of the stop bar 36 is less than the distance from the pin to the lower end of the stop bar 36. A counterweight block 40 is provided at the lower end of the stop bar 36. The stop bar 36 is located in front of the spindle. A limit block 37 is fixed on the support frame 7. The rear side of the lower end of the stop bar 36 contacts the front side of the limit block 37.

[0042] In this invention, the outer circle of the lever head 5 is machined, and holes are drilled at both ends of the lever body 1 with the outer circle of the lever head 5 as the reference. The two lever heads 5 are installed and welded to the rear end face. Then, the inner circle of the lever head 5 is machined on a lathe to form a circular hole section 18 (shortening the length of the original flared mouth), which ensures the concentricity of the circular hole section 18 relative to the mandrel 2.

[0043] The locking sleeve 15 is pressed into the bearing 14 by using a round nut 16. The conical surface 23 of the outer circle of the locking sleeve 15 is locked to the conical hole 21 of the inner circle of the bearing 14, which fundamentally eliminates the gap between the square hole section 20 of the lever body 1 and the outer square section of the mandrel 2. This ensures that the lever body 1 does not jump or move relative to the mandrel 2 during the unwinding process, and guarantees the stability and tension stability during high-speed unwinding.

[0044] The outer circle 11 of the convex arc surface on the mandrel 2 of the axial positioning structure is rolledly connected to the outer circle 13 of the concave arc surface of the two support wheels, which has good axial positioning and prevents the mandrel 2 from moving axially relative to the support wheels.

[0045] The specific process of pushing the empty bar out of the working position after unwinding is as follows: After the artificial leather product wound around the outer circle of the bar is unwound, the two cylinders 10 on the front and rear sides are activated simultaneously. The piston rods of the two cylinders 10 extend synchronously, driving the sliding frame 26 to move forward along the horizontal slide rail through the push-pull rod 24 until the linkage shaft 32 at the front end of the limit rod 30 moves into the semi-circular groove 33 of the limit support 29. Then, the piston rod of the cylinder 10 continues to extend. Since the height of the push-pull rod 24 is higher than that of the limit rod 30, the drive frame rotates upward about the center line of the linkage shaft 32 as the axis. The sliding frame 26 moves upward and disengages from the horizontal slide rail. As the rear end of the sliding frame 26 rises... The height of the rear support wheel 28 gradually increases above the height of the front support wheel 27 until the convex arc surface on the mandrel presses against the highest point of the outer circle of the concave arc surface of the front support wheel 27. Then, the sliding frame 26 rotates upwards. Under its own weight, the mandrel and the lever break through the obstruction of the stop bar 36 and roll forward along the top surface of the sliding frame 26 onto the rubber pad 39 of the left and right horizontal feed lever mechanism 9. They then roll onto the rubber roller 38, continuing to roll forward due to inertia, blocked and buffered by the front slope of the rubber pad 39, and then rolling backwards, blocked and buffered by the rear slope of the rubber pad 39, until they come to a stable stop on the rubber roller 38. The roller conveyor is then started, and all the rubber rollers 38 rotate synchronously, conveying the unwinding lever assembly 8 to the left or right to the designated position. Then, the piston rod of cylinder 10 retracts, and the sliding frame 26 rotates backward and downward around the linkage shaft 32 until it falls into the horizontal slide rail. Then, the piston rod of cylinder 10 continues to retract, pulling the sliding frame 26 backward until the vertical stop bar 36 contacts the limit block, at which point cylinder 10 stops working. Then, the unwinding bar assembly 8 for the next wound product roll moves along the top surface of the support frame 7 (higher at the rear and lower at the front) between the front support wheel 27 and the rear support wheel 28 to continue the unwinding operation.

[0046] As the product roll is released, the weight decreases, and the spindle speed increases. To prevent the spindle 2 from being pulled forward by the product and disengaging from the front support wheel 27 and rear support wheel 28, a stop bar 36 is provided. The lower rear end of the stop bar 36 is restricted by a limiting block 37, which prevents the spindle 2 from moving forward and ensures good safety. A counterweight 40 is provided at the lower end of the stop bar 36. When the sliding frame 26 returns to its original position from top to bottom, the stop bar 36 remains vertical, ensuring that the lower end of the stop bar 36 is always in front of the limiting block 37 and does not touch the limiting block 37.

[0047] The assembly steps of the mandrel 2 and the lever body 1 of the present invention are as follows:

[0048] 1) Install the two bearings 14 into the circular holes 18 at both ends of the left and right ends of the lever body 1; 2) Insert the mandrel 2 into the lever body 1, with the outer square section of the mandrel 2 and the inner square hole of the lever head 5 in clearance fit; 3) Put the left end locking sleeve 15 onto the left end of the mandrel 2 and push it from left to right to the conical hole 21 inside the bearing 14, then put the round nut 16 onto the left end of the mandrel 2 and push it from left to right to the external thread on the left side of the locking sleeve 15, and turn the round nut 16 clockwise, so that the round nut 16 moves closer to the bearing 14. Then lock the two halves of the clamp-type retaining ring 17 (a two-half structure connected by a bolt assembly) onto the outer circle 12 of the cylindrical surface of the annular groove, and rotate the round nut 16 counterclockwise, so that the round nut 16 contacts the clamp-type retaining ring. 17. After the right end face, continue to rotate the round nut 16 counterclockwise. The round nut 16 presses against the clamp-type retaining ring 17, and the expansion joint 22 of the locking sleeve 15 narrows. The locking sleeve 15 moves to the right and is pressed into the bearing 14. 4) Follow the same operation as step 3) to press the right locking sleeve 15 into the right bearing 14. 5) After the mandrel 2 is installed, hoist the unwinding rod assembly and the product wound on the outer circle of the rod body 1 together onto the left sliding frame 26 and the right sliding frame 26. The outer circle 11 of the convex arc surface of the bottom of the annular groove 6 at the end of the mandrel 2 is rolled to the outer circle 13 of the concave arc surface of the front support wheel 27 and the rear support wheel 28. 6) Set the brake wheel on both ends of the mandrel outside the support frame (this step is a routine operation).

[0049] After all the products on the outer circle of the lever body 1 have been placed, the mandrel 2 needs to be removed from the lever body 1. The specific disassembly steps are as follows: 1) Remove the brake wheel (this step is a routine operation); 2) Remove the two clamp-type retaining rings 17; 3) Turn the round nut 16 clockwise to pull the locking sleeve 15 out of the bearing 14 by a section. This creates a gap between the conical hole 21 on the inner circle of the bearing 14 and the conical surface 23 on the outer circle of the locking sleeve 15. Remove the round nut 16 and the locking sleeve 15; 4) Pull the mandrel 2 out of the lever body.

[0050] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A winding unwinding bar and an automatic extrusion device, characterized in that: It includes a support frame, a winding boom assembly, and left and right horizontal feeding mechanisms. The upper part of the left and right ends of the support frame is equipped with a set of roller bracket devices that can slide back and forth and flip forward and upward. The winding boom assembly is horizontally arranged in the left and right directions. The outer circle of the left end of the winding boom assembly is rotatably connected to the top of the roller bracket device on the left side through a left axial positioning structure. The outer circle of the right end of the winding boom assembly is rotatably connected to the top of the roller bracket device on the right side through a right axial positioning structure. The left and right horizontal feeding mechanisms are set on the upper front side of the support frame. The roller bracket devices at both ends of the support frame have the same structure and are arranged symmetrically on the left and right. The roller support assembly includes a cylinder, a push-pull rod, a horizontal rail, a sliding frame, a front support wheel, a rear support wheel, a limiting support, and a limiting top rod. The horizontal rail is mounted on the support frame along the front-to-back direction. The bottom of the sliding frame is slidably connected to the horizontal rail. The front and rear support wheels are rotatably connected to the sliding frame. The front and rear support wheels are at the same height and spaced apart. The cylinder, push-pull rod, and limiting top rod are all mounted along the front-to-back direction. The rear end of the cylinder body is mounted on the upper left side of the support frame via a hinge support. The front end of the push-pull rod is fixedly connected to the upper rear side of the sliding frame. The push-pull rod is hinged to the piston rod of the cylinder, and the limit rod is fixedly connected to the lower front of the sliding frame. The push-pull rod is higher than the limit rod in the height direction. The front ends of the limit rods of the two roller bracket devices are connected by a linkage shaft that is horizontally set in the left-right direction. The limit support is fixedly set on the front side of the support frame. The limit support has a semi-circular groove with an open rear side. The semi-circular groove corresponds to the two ends of the linkage shaft. The linkage shaft has an axial positioning block that contacts the right side of the left limit support and the left side of the right limit support.

2. The unwinding lever and automatic extrusion device according to claim 1, characterized in that: The top surface of the support frame is inclined at the rear and at the front, and the top surface of the support frame extends from the rear to the top of the rear support wheel.

3. The unwinding bar and automatic extrusion device according to claim 1 or 2, characterized in that: The unwinding lever assembly includes a mandrel, a lever body, and two lever heads. Hollow lever heads are welded to both ends of the inner hole of the lever body. The mandrel is coaxially installed inside the lever body. An annular groove is provided on the outer circle of the left and right ends of the mandrel. A left radial positioning mechanism is provided between the left end of the mandrel and the left lever head, and a right radial positioning mechanism is provided between the right end of the mandrel and the right lever head.

4. The unwinding bar and automatic extrusion device according to claim 3, characterized in that: The two annular grooves have the same structure and are arranged symmetrically from left to right. The bottom of the left annular groove includes the outer circle of the convex arc surface on the left and the outer circle of the cylindrical surface on the right. The outer diameter of the cylindrical surface is smaller than the minimum outer diameter of the outer circle of the convex arc surface.

5. The unwinding bar and automatic extrusion device according to claim 4, characterized in that: The left axial positioning structure is the same as the right axial positioning structure and is symmetrically arranged. The left axial positioning structure includes the concave arc outer circle of the front support wheel and the rear support wheel on the left side and the convex arc outer circle. The convex arc outer circle on the spindle is in rolling connection with the concave arc outer circle of the front support wheel and the rear support wheel.

6. The unwinding bar and automatic extrusion device according to claim 5, characterized in that: The left and right radial positioning mechanisms have identical structures and are symmetrically arranged. The lever heads at both ends have identical structures and are also symmetrically arranged. The left radial positioning mechanism includes a bearing, a locking sleeve, a round nut, and a clamp-type retaining ring. The inner hole of the lever head at the left end, from left to right, consists of a round hole section, a conical section (larger on the left and smaller on the right), and a square hole section. The outer square section on the spindle is clearance-fitted with the square hole section. The clamp-type retaining ring is coaxially mounted on the outer cylindrical surface of the left annular groove. The outer diameter of the bearing is interference-fitted into the round hole section of the lever head. The inner circle of the bearing is a conical bore that is larger on the left and smaller on the right. The adapter sleeve is coaxially mounted on the outer circle of the mandrel on the right side of the clamp-type retaining ring. The adapter sleeve has an expansion joint along the axial direction. The right side of the outer circle of the adapter sleeve is a conical surface that is larger on the left and smaller on the right. The conical surface of the adapter sleeve is coaxially fitted into the conical bore of the inner circle of the bearing. The left side of the outer circle of the adapter sleeve has an external thread. The round nut is threaded onto the external thread on the left side of the adapter sleeve. The left end of the round nut is press-fitted with the right end face of the clamp-type retaining ring. The conical surface of the adapter sleeve is press-fitted with the conical bore of the inner circle of the bearing.

7. The unwinding bar and automatic extrusion device according to claim 1 or 2, characterized in that: The left and right horizontal conveying mechanism is a roller conveyor. The roller conveyor includes several rubber rollers arranged at intervals along the left and right direction. The top of the rubber rollers is lower than the top of the front side of the support frame. A rubber pad is laid on the upper part of the frame of the roller conveyor. The vertical cross section of the rubber pad along the front and back direction is grooved. The rear edge of the rubber pad is connected to the front edge of the support frame. The bottom of the rubber pad has a through hole corresponding to each rubber roller. The top of the middle of each rubber roller protrudes upward from the through hole and is located inside the rubber pad.

8. The unwinding bar and automatic extrusion device according to claim 1, characterized in that: A stop bar is rotatably connected to the left side of the left sliding frame and the right side of the right sliding frame via a pin. The distance from the pin to the upper end of the stop bar is less than the distance from the pin to the lower end of the stop bar. A counterweight is provided at the lower end of the stop bar. The stop bar is located in front of the spindle. A limit block is fixed on the support frame. The rear side of the lower end of the stop bar contacts the front side of the limit block.

Images