A kind of expansion mechanism for unwinding and winding material

Abstract

The utility model relates to a kind of expansion and contraction mechanism for unwinding and winding material, belong to the unwinding and winding material equipment technical field of amorphous strip material.The utility model is combined by the cooperation of shaft assembly, chuck, inner liner, wing plate and winding material driving group, forms the automatic expansion and contraction mechanism that can be applied to winding material, unwinding material, not only can make winding material tensioned by timely making adjustment to collect and release according to tension condition, the gap condition between winding material and roll, prevent winding material from appearing to move or bounce, winding material can also be ensured not to fall off by front and rear baffle, winding rotation movement of winding material can also be satisfied simultaneously, two sets of power source are reasonably distributed and do not interfere with each other, overall structure can be directly connected to the process production line of amorphous strip material, improve the quality and work efficiency of product.

Description

Technical Field

[0001] This utility model relates to an expansion and contraction mechanism for unwinding and rewinding rolled materials, belonging to the technical field of unwinding and rewinding equipment for amorphous ribbon materials. Background Technology

[0002] In the field of amorphous strip processing, the strip cutter, as a key piece of equipment for achieving core processes such as fixed-length cutting and slitting, directly determines the precision and quality of the final product through the operational stability of its winding and unwinding devices. Currently, the core actuators of the winding and unwinding devices in mainstream amorphous strip cutters in the industry are all ordinary rigid rollers. These rollers have a simple structure and low manufacturing cost, and can meet basic usage requirements in early low-speed, low-precision processing scenarios. Therefore, they are widely used in various small and medium-sized amorphous strip processing equipment. However, as the application scenarios of amorphous ribbon extend to high-end fields such as high-frequency transformers and precision sensors, the market's requirements for the processing precision of ribbon (such as thickness uniformity and cut flatness) continue to increase. The limitations of ordinary rigid rollers are gradually becoming apparent, and stability issues during the winding and unwinding processes are becoming increasingly prominent. Specifically, during the winding stage of amorphous ribbon, as the ribbon diameter continuously increases during the winding process, if the speed adjustment response of the winding motor is lagging or the parameters are not properly matched, instantaneous fluctuations in the winding speed are very likely to occur. During the unwinding stage, when the initial roll diameter is large, the influence of the ribbon's own weight on the unwinding tension, or when the roll diameter decreases, if the tension feedback adjustment is not timely, it will also lead to unstable unwinding speed. The aforementioned speed fluctuations directly lead to two core problems: First, the coil bounces, meaning the strip moves or bounces on the roller surface, disrupting the relative positional accuracy between the strip and the subsequent cutting die; second, the gap between the coil and the roller (die) is uneven. Amorphous strips are relatively thin (usually only 20-50μm), and even small gap deviations can cause uneven stress on the strip during transmission, resulting in defects such as wrinkles and tensile deformation. Further analysis reveals that the fatal flaw of existing ordinary rigid rollers lies in their inability to automatically adjust the clearance between the rollers and the coiled material. On one hand, parameters such as the diameter and surface flatness of the rigid rollers are fixed values, making dynamic adjustment impossible based on the real-time state of the coiled material (e.g., changes in coil diameter, tension fluctuations, and strip thickness deviations). On the other hand, existing equipment lacks an effective clearance detection and feedback mechanism. Even if an abnormal clearance is detected manually, it requires stopping the machine and adjusting the mechanical structure (e.g., replacing rollers with different diameters, adjusting shim thickness, etc.) to correct it. This is not only cumbersome and inefficient but also makes it difficult to guarantee adjustment accuracy. This passive clearance control method ultimately leads to frequent transmission instability issues during the winding and unwinding of amorphous strips, directly affecting the output accuracy of subsequent cutting processes. This results in finished strip dimensional tolerances exceeding design requirements and increases the probability of defects such as strip breakage and surface scratches, severely restricting capacity improvement and product quality upgrades in the amorphous strip processing industry. Utility Model Content

[0003] To solve the above problems, this utility model provides an expansion and contraction mechanism for unwinding and rewinding rolled material, comprising: The roll drive unit includes an unwinding / rewinding power source and a tensioning power source fixed to the frame; The shaft assembly includes an inner shaft connected to the unwinding and rewinding power source at its rear end and a main shaft sleeved outside the inner shaft. The inner shaft and the main shaft are fitted together by bearings with a gap, and the inner shaft can rotate and extend relative to the main shaft. A chuck, fitted to the non-end portion outside the spindle; The inner liner is fitted to the part of the spindle that extends out of the chuck. The outer periphery of the inner liner is provided with multiple strip-shaped pieces. The inner liner is connected to the front end of the inner shaft. The wing plate is movably connected to the outer periphery of the chuck, and has an inclined wing groove on its inner side, which movably engages with the strip member. When the inner shaft rotates relative to the main shaft and performs telescopic movements, it will drive the inner liner to move along the wing groove of the wing plate, thereby causing the wing plate to contract or expand relative to the axis of the main shaft.

[0004] Furthermore, the wing groove is a dovetail groove that slopes from back to front and from inside to outside. When the inner shaft drives the inner liner to move forward, the wing plate retracts relative to the main shaft axis; when the inner shaft drives the inner liner to move backward, the wing plate expands relative to the main shaft axis.

[0005] Furthermore, the front end of the liner is connected to the front end of the inner shaft via a sliding cover plate.

[0006] Furthermore, the front end and rear end of the wing plate are respectively equipped with a front baffle and a rear baffle.

[0007] Furthermore, the front baffle is a double-leaf vertical plate structure, and the rear baffle is a four-leaf cross-shaped plate structure. When the coil is wound on the wing plate, it is limited by the front baffle and the rear baffle.

[0008] Furthermore, the shaft assembly between the chuck and the coil drive assembly is mounted on a support bracket.

[0009] Furthermore, the expansion bracket includes an expansion stand fixed to the frame and a sleeve installed on the top of the expansion stand. The sleeve is fitted with a main shaft through a bearing, and bearing caps are provided at both ends of the sleeve.

[0010] Furthermore, the expansion bracket is connected to the expansion slide rail via an expansion slide plate, and the expansion slide rail is fixed to the frame.

[0011] Furthermore, the unwinding and rewinding power source includes an unwinding and rewinding servo motor fixed to the frame. The output end of the unwinding and rewinding servo motor is connected to the drive pulley. The main shaft is fitted to the driven pulley via a bushing. The drive pulley is connected to the driven pulley via a synchronous belt and drives the transmission. The unwinding and rewinding servo motor sequentially drives the drive pulley and the driven pulley, thereby driving the main shaft to rotate together with the inner liner and the wing plate.

[0012] Furthermore, the expansion power source includes at least one expansion cylinder fixed to the frame. The output end of the expansion cylinder is connected to the top plate, and the top plate is connected to the rear end of the inner shaft. The expansion cylinder drives the top plate to push or pull the inner shaft.

[0013] The beneficial effects of this utility model are: This invention combines a shaft assembly, chuck, liner, and wing plate with a roll drive assembly to form an automatic expansion and contraction mechanism suitable for take-up and unwinding of rolls. It not only adjusts the take-up and unwinding according to tension and the gap between the roll and the roller to tighten the roll and prevent it from shifting or bouncing, but also ensures the roll does not fall off through front and rear baffles. Simultaneously, it satisfies the roll's rotational movement during take-up. The two power sources are rationally distributed and do not interfere with each other. The overall structure can be directly connected to the amorphous ribbon production line, improving product quality and work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front side of the overall structure in one embodiment of the present invention; Figure 2 This is a schematic diagram of the rear side of the overall structure in one embodiment of the present utility model; Figure 3 This is a half-sectional view showing the fit of the shaft assembly, chuck, liner, and wing plate in one embodiment of the present invention. In the diagram: 1. Unwinding / rewinding power source; 2. Expansion power source; 3. Inner shaft; 4. Main shaft; 5. Chuck; 6. Wing plate; 7. Sliding cover plate; 8. Expansion bracket; 9. Liner; 11. Unwinding / rewinding servo motor; 12. Driven pulley; 21. Expansion cylinder; 22. Top plate; 31. Strip component; 61. Front baffle; 62. Rear baffle; 81. Expansion slide rail. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] This utility model provides an expansion and contraction mechanism for unwinding and rewinding coiled material. It is generally connected to the process production line of amorphous strip cutting equipment. It can be installed on both the unwinding mechanism and the rewinding mechanism. It includes a coil drive group and a shaft assembly driven by the coil drive group. The shaft assembly is provided with a chuck 5, a liner 9, and a wing plate 6. The coiled material is wound around the outer periphery of the wing plate 6.

[0019] In some embodiments, the roll drive assembly includes a winding and unwinding power source 1 and a stretching power source 2 fixed to the frame, as shown in Figure 2. These two power sources can be arranged vertically on the rear frame without interfering with each other.

[0020] In the example of Figure 2, the unwinding and rewinding power source 1 includes an unwinding and rewinding servo motor 11 fixed to the frame. The output end of the unwinding and rewinding servo motor 11 is connected to the drive pulley. The main shaft 4 is fitted to the driven pulley 12 through a bushing. The drive pulley is connected to the driven pulley 12 through a synchronous belt and drives the transmission. The unwinding and rewinding servo motor 11 drives the drive pulley and the driven pulley 12 in sequence, thereby driving the main shaft 4 to rotate together with the inner liner 9 and the wing plate 6.

[0021] In the example of Figure 2, the expansion power source 2 includes at least one expansion cylinder 21 fixed to the frame. The output end of the expansion cylinder 21 is connected to the top plate 22, which is connected to the rear end of the inner shaft 3. The expansion cylinder 21 drives the top plate 22 to push or pull the inner shaft 3.

[0022] In some embodiments, components such as the expansion cylinder 21 and the top plate 22 are mounted on a fixed frame above the take-up and unwind servo motor 11, and the driven wheel 12 is located above the driving wheel near the expansion bracket 8, so that it will not interfere with other components.

[0023] In the examples shown in Figures 1 and 3, the shaft assembly includes an inner shaft 3 connected to the unwinding / rewinding power source 1 at its rear end and a main shaft 4 sleeved outside the inner shaft 3. The inner shaft 3 and the main shaft 4 are fitted together by bearings with a gap, allowing the inner shaft 3 to rotate and extend relative to the main shaft 4. The chuck 5 is fitted to the non-end portion outside the main shaft 4, i.e., between the inner liner 9 and the expansion bracket 8. The inner liner 9 is fitted to the portion of the main shaft 4 that extends out of the chuck 5. The outer periphery of the inner liner 9 is provided with multiple strip-shaped pieces 31, and the inner liner 9 is connected to the front end of the inner shaft 3. The wing plate 6 is movably connected to the outer periphery of the chuck 5, and its inner side has an inclined wing groove that movably engages with the strip-shaped pieces 31 through the wing groove.

[0024] In some embodiments, when the inner shaft 3 rotates relative to the main shaft 4 and simultaneously extends and retracts, it causes the inner liner 9 to move along the wing groove of the wing plate 6, thereby causing the wing plate 6 to contract or expand relative to the axis of the main shaft 4. Specifically, in the example of Figure 3, when the inner liner 9 moves to the right (backward) relative to the wing plate 6, the wing plate 6 expands outward due to the tilt of the wing groove, thus forming an expansion action. When the inner liner 9 moves to the left (forward) relative to the wing plate 6, the wing plate 6 retracts inward due to the tilt of the wing groove, thus forming a contraction action.

[0025] In the example of Figure 3, the wing groove is a dovetail groove that slopes from back to front and from inside to outside. When the inner shaft 3 drives the inner liner 9 forward, the wing plate 6 retracts relative to the axis of the main shaft 4; when the inner shaft 3 drives the inner liner 9 backward, the wing plate 6 expands relative to the axis of the main shaft 4. In the example of Figure 3, the front end of the inner liner 9 is connected to the front end of the inner shaft 3 via a sliding cover plate 7, limiting the travel of the inner shaft 3 and the main shaft 4 relative to the inner liner 9. In some embodiments, the front and rear ends of the wing plate 6 are respectively equipped with a front baffle 61 and a rear baffle 62 to prevent the coil material from slipping.

[0026] In the example shown in Figure 1, the front baffle 61 is a double-leaf vertical plate structure, and the rear baffle 62 is a four-leaf cross-shaped plate structure. When the coil is wound onto the wing plate 6, it is limited by the front baffle 61 and the rear baffle 62. In some embodiments, the shaft assembly between the chuck 5 and the coil drive assembly is mounted on the expansion bracket 8.

[0027] In some embodiments, the expansion bracket 8 includes an expansion stand fixed to the frame and a sleeve installed on the top of the expansion stand. The sleeve is fitted with a main shaft 4 through a bearing. Bearing caps are provided at both ends of the sleeve to prevent the sleeve from detaching.

[0028] In some embodiments, the expansion bracket 8 can be connected to the expansion slide rail 81 via an expansion slide plate, and the expansion slide rail 81 is fixed to the frame, thus allowing the position of the expansion bracket 8 to be modified.

[0029] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A shrinking mechanism for unwinding and rewinding rolled material, characterized in that, include: The roll drive unit includes an unwinding / rewinding power source and a tensioning power source fixed to the frame; The shaft assembly includes an inner shaft connected to the unwinding and rewinding power source at its rear end and a main shaft sleeved outside the inner shaft. The inner shaft and the main shaft are fitted together by bearings with a gap, and the inner shaft can rotate and extend relative to the main shaft. A chuck, fitted to the non-end portion outside the spindle; The inner liner is fitted to the part of the spindle that extends out of the chuck. The outer periphery of the inner liner is provided with multiple strip-shaped pieces. The inner liner is connected to the front end of the inner shaft. The wing plate is movably connected to the outer periphery of the chuck, and has an inclined wing groove on its inner side, which movably engages with the strip member. When the inner shaft rotates relative to the main shaft and performs telescopic movements, it will drive the inner liner to move along the wing groove of the wing plate, thereby causing the wing plate to contract or expand relative to the axis of the main shaft.

2. The expansion and contraction mechanism according to claim 1, characterized in that, The wing groove is a dovetail groove that slopes from back to front and from inside to outside. When the inner shaft drives the inner lining to move forward, the wing plate retracts relative to the main shaft axis; when the inner shaft drives the inner lining to move backward, the wing plate expands relative to the main shaft axis.

3. The expansion and contraction mechanism according to claim 1, characterized in that, The front end of the liner is connected to the front end of the inner shaft via a sliding cover plate.

4. The expansion and contraction mechanism according to claim 1, characterized in that, The front and rear ends of the wing plate are respectively equipped with a front baffle and a rear baffle.

5. The expansion and contraction mechanism according to claim 4, characterized in that, The front baffle is a double-leaf vertical plate structure, and the rear baffle is a four-leaf cross-shaped plate structure. When the coil is wound on the wing plate, it is limited by the front baffle and the rear baffle.

6. The expansion and contraction mechanism according to claim 1, characterized in that, The shaft assembly between the chuck and the coil drive group is mounted on the expansion bracket.

7. The expansion and contraction mechanism according to claim 6, characterized in that, The expansion support includes an expansion stand fixed to the frame and a sleeve installed on the top of the expansion stand. The sleeve is fitted with a main shaft through a bearing, and bearing caps are provided at both ends of the sleeve.

8. The expansion and contraction mechanism according to claim 6, characterized in that, The expansion bracket is connected to the expansion slide rail via an expansion slide plate, and the expansion slide rail is fixed to the frame.

9. The expansion and contraction mechanism according to claim 1, characterized in that, The unwinding and rewinding power source includes an unwinding and rewinding servo motor fixed to the frame. The output end of the unwinding and rewinding servo motor is connected to the drive pulley. The main shaft is fitted to the driven pulley through a bushing. The drive pulley is connected to the driven pulley through a synchronous belt and drives the transmission. The unwinding and rewinding servo motor sequentially drives the drive pulley and the driven pulley, thereby driving the main shaft to rotate together with the inner liner and the wing plate.

10. The expansion and contraction mechanism according to claim 1, characterized in that, The expansion power source includes at least one expansion cylinder fixed to the frame. The output end of the expansion cylinder is connected to the top plate, and the top plate is connected to the rear end of the inner shaft. The expansion cylinder drives the top plate to push or pull the inner shaft.

Images