An unwinding mechanism for metal coil processing

Abstract

The present invention relates to the technical field of uncoiler processing, specifically to an unwinding mechanism for metal coil processing, comprising a mounting frame and an expansion and contraction mechanism arranged on the mounting frame, and further comprising: a pressure arm mechanism, arranged on the mounting frame, for pressing the metal coil sleeved on the outside of the expansion and contraction mechanism; the pressure arm mechanism comprises a pressure arm assembly, which can be pressed on the surface of the metal coil after being driven; a transmission assembly, for transmitting power between the expansion and contraction mechanism and the pressure arm assembly; an axial adjustment assembly, for connecting the transmission assembly and the pressure arm assembly. The beneficial effect of the present invention is that the pressure arm assembly is connected to the expansion and contraction mechanism through the transmission assembly and the axial adjustment assembly, and when the expansion and contraction mechanism drives the metal coil to rotate and unwind, it can synchronously drive the pressure arm assembly to deflect to the side close to the metal coil, so that the deflection speed of the pressure arm assembly matches the linear speed change of the diameter of the metal coil, thereby ensuring that the pressure arm assembly can always press the metal coil.

Description

Technical Field

[0001] The present invention relates to the technical field of decoilers, and specifically relates to an unwinding mechanism for metal coil processing. Background Art

[0002] A metal coil unwinding mechanism, also known as a decoiler, is a device used in the metal processing and manufacturing process to unwind coils (such as steel coils, aluminum coils, etc.) and transport them to subsequent processing equipment. It is widely used in industries such as steel, non-ferrous metals, automotive manufacturing, and home appliance production.

[0003] For example, the patent with the publication number CN116605690A discloses a decoiler, which includes a frame, a hydraulic station, and a decoiler main body. The decoiler main body is installed on the frame. The decoiler main body is used to drive the coil to rotate. A pressure roller assembly for providing a pressing force to the coil is installed on one side of the decoiler main body. A disc is fixedly installed on the decoiler main body. A disc brake assembly for quickly stopping the decoiler main body is provided on one side of the disc. The hydraulic station is located on one side of the frame, and the hydraulic station is used to control hydraulic drive. Among them, a hydraulic cylinder drives a driving arm and a pressure wheel to move towards the coil direction, so that the pressure wheel fits on the outer surface of the coil for pressing to prevent the coil from loosening during unwinding.

[0004] The disadvantages of the prior art are that it drives the pressure wheel to move through a hydraulic cylinder to press the metal coil. However, during high-speed unwinding, the servo adjustment speed of the pressure wheel is difficult to keep up with the linear speed change of the diameter of the metal coil, resulting in the pressure wheel being unable to stably and continuously press the metal coil, causing a sudden change in the tension of the metal coil and affecting the stability and accuracy of coil unwinding. For this reason, we propose an unwinding mechanism for metal coil processing to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an unwinding mechanism for metal coil processing to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An unwinding mechanism for metal coil processing, including an installation frame and a telescopic mechanism arranged on the installation frame, further including: a pressure arm mechanism arranged on the installation frame for pressing the metal coil sleeved outside the telescopic mechanism;

[0007] The pressure arm mechanism includes a pressure arm assembly that can be pressed on the surface of the metal coil after being driven; a transmission assembly for transmitting power between the telescopic mechanism and the pressure arm assembly; and an axial adjustment assembly for connecting the transmission assembly and the pressure arm assembly;

[0008] The transmission assembly includes a first electric telescopic rod and a gear set. When the expansion and contraction mechanism rotates, it can drive the pressing arm assembly to deflect through the transmission of the transmission assembly and the axial adjustment assembly. The first electric telescopic rod switches the cooperation between different gears in the gear set, and can adjust the deflection direction of the pressing arm assembly and the deflection speed in different deflection directions.

[0009] Preferably, the transmission assembly further includes a speed reducer and a sprocket component. The sprocket component is arranged at one end of the input shaft of the speed reducer and is used to transmit power between the speed reducer and the expansion and contraction mechanism. The gear set includes a one-way ratchet gear one and a one-way ratchet gear two fixedly sleeved on the input shaft of the speed reducer, a one-way ratchet gear three and a one-way ratchet gear four fixedly sleeved on the output shaft of the speed reducer, and a transmission gear one and a transmission gear two.

[0010] Preferably, the transmission gear one can be switched by the first electric telescopic rod to engage with the one-way ratchet gear one or the one-way ratchet gear two, and the transmission gear two can be switched by the first electric telescopic rod to engage with the one-way ratchet gear three or the one-way ratchet gear four. The rotation directions of the one-way ratchet gear one and the one-way ratchet gear three are the same, and the rotation directions of the one-way ratchet gear two and the one-way ratchet gear four are the same.

[0011] Preferably, the axial adjustment assembly includes a transmission sleeve and a transmission rod that are movably sleeved. The transmission rod can slide in the transmission sleeve to adjust the position of the pressing arm assembly in the axial direction of the expansion and contraction mechanism. The cooperation between the transmission sleeve and the transmission rod can transmit torque between the transmission assembly and the axial adjustment assembly.

[0012] Preferably, the pressing arm assembly includes a connecting pressing arm and a center pressing roller and a side pressing roller that are movably installed on the connecting pressing arm. The side pressing roller and the center pressing roller are on the same central axis, and a positioning stop edge is arranged at one end of the side pressing roller away from the center pressing roller.

[0013] Preferably, the positioning stop edge can be driven to move at the end of the center pressing roller and make the positioning stop edge snap onto the edge position of the metal coil.

[0014] Preferably, the expansion and contraction mechanism includes a support shaft movably installed on the installation frame and a hydraulic cylinder at one end of the support shaft. A support plate assembly is arranged on the periphery of the support shaft, and the support plate assembly is in transmission connection with the hydraulic cylinder.

[0015] Preferably, the support plate assembly includes a sector-shaped support plate. A cavity is formed in the sector-shaped support plate, and a transmission plate is clamped in the cavity, and hydraulic oil is filled on top of the transmission plate. A jacking component and an auxiliary support strip are arranged on the side of the sector-shaped support plate away from the support shaft.

[0016] Preferably, one end of the lifting component is fixedly connected to the auxiliary support bar, and the other end is connected to the cavity inside the fan-shaped support plate. When the transmission plate moves in the cavity, the auxiliary support bar can be pushed out through the transmission of hydraulic oil and the lifting component.

[0017] Preferably, the auxiliary support bars are arranged on the fan-shaped support plate in a direction parallel to the support axis, and the auxiliary support bars are located on both sides of the longitudinal bisector of the fan-shaped support plate.

[0018] In the above technical scheme, the beneficial effect of the present invention is: the pressure arm assembly is connected to the expansion and contraction mechanism through the transmission assembly and the axial adjustment assembly, and when the expansion and contraction mechanism drives the metal coil to rotate and unwind, it can synchronously drive the pressure arm assembly to deflect to the side close to the metal coil, so that the deflection speed of the pressure arm assembly matches the linear speed change of the diameter of the metal coil, thereby ensuring that the pressure arm assembly can always press the metal coil tightly. In addition, by arranging one-way ratchet gears with opposite rotation directions on the input and output shafts of the reducer, the pressure arm assembly can be driven to move slowly to press the metal coil through the speed reduction of the reducer and the transmission through the one-way ratchet gear on the output shaft, and the one-way ratchet gear on the input shaft of the reducer can drive the quick pressure arm assembly to deflect in the opposite direction for reset, thereby shortening the operation time.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a structural schematic diagram of one side of the mounting frame of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the other side of the mounting frame of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the installation frame of the present invention from a top view;

[0025] Figure 4 It is a structural schematic diagram of the transmission assembly of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the two ends of the reducer of the present invention;

[0027] Figure 6 Schematic diagram of the axial adjustment assembly of the present invention;

[0028] Figure 7 Schematic diagram of the pressing arm assembly of the present invention;

[0029] Figure 8 Schematic diagram of the expansion and contraction mechanism of the present invention;

[0030] Figure 9 Schematic diagram of the support plate assembly of the present invention;

[0031] Figure 10 Schematic diagram of the cross-section of the sector support plate of the present invention;

[0032] Figure 11 Schematic diagram of the bottom of the auxiliary support bar of the present invention;

[0033] Figure 12 Schematic diagram of the jacking component of the present invention.

[0034] Explanation of reference numerals:

[0035] In the figure: 1, mounting frame;

[0036] 2, expansion and contraction mechanism; 21, support shaft; 22, outer sleeve; 23, hydraulic cylinder; 24, support plate assembly; 241, sector support plate; 242, drive plate; 243, auxiliary support bar; 244, jacking component; 2441, positioning sleeve; 2442, drive piston; 2443, return spring;

[0037] 3, drive motor; 4, tail end support frame; 5, loading trolley;

[0038] 6, pressing arm mechanism;

[0039] 61, drive assembly; 611, electric telescopic rod one; 612, speed reducer; 613, sprocket component; 614, drive gear one; 615, drive gear two; 616, one-way ratchet gear one; 617, one-way ratchet gear two; 618, one-way ratchet gear three; 619, one-way ratchet gear four;

[0040] 62, axial adjustment assembly; 621, drive sleeve; 622, drive rod; 623, adjustment screw;

[0041] 63, pressing arm assembly; 631, connecting pressing arm; 632, center pressing roller; 633, side pressing roller; 634, positioning edge; 635, electric telescopic rod two. Detailed implementation manners

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0043] Please refer to Figures 1-12 , an embodiment of the present invention provides a technical solution: an unwinding mechanism for metal coil processing, including an installation frame 1 and a telescopic mechanism 2 provided on the installation frame 1, and further including: a pressing arm mechanism 6 provided on the installation frame 1 for pressing the metal coil sleeved outside the telescopic mechanism 2; a tail-end support frame 4 provided at the tail of the installation frame 1 for assisting in supporting the telescopic mechanism 2; and a loading trolley 5 provided on one side of the installation frame 1 close to the tail-end support frame 4 for transporting the metal coil to the telescopic mechanism 2.

[0044] The pressing arm mechanism 6 includes a pressing arm assembly 63 that can be pressed against the surface of the metal coil after being driven; a transmission assembly 61 for transmitting power between the telescopic mechanism 2 and the pressing arm assembly 63; and an axial adjustment assembly 62 for connecting the transmission assembly 61 and the pressing arm assembly 63;

[0045] The transmission assembly 61 includes a first electric telescopic rod 611 and a gear set. When the telescopic mechanism 2 rotates, it can drive the pressing arm assembly 63 to deflect through the transmission of the transmission assembly 61 and the axial adjustment assembly 62. The first electric telescopic rod 611 switches the cooperation between different gears in the gear set, and can adjust the deflection direction of the pressing arm assembly 63 and the deflection speed in different deflection directions.

[0046] Specifically, the mounting frame 1 is used to provide an installation position for the expansion and contraction mechanism 2 and the pressure arm mechanism 6. The pressure arm assembly 63 is connected to the expansion and contraction mechanism 2 through the transmission assembly 61 and the axial adjustment assembly 62. In the initial state, the pressure arm assembly 63 is adjusted to the position of pressing the metal coil. When the expansion and contraction mechanism 2 drives the metal coil to unwind, a group of gears in the gear group is driven to drive the pressure arm assembly 63 to deflect synchronously to the side close to the metal coil, so that the deflection speed of the pressure arm assembly 63 matches the linear speed change of the metal coil diameter, ensuring that the pressure arm assembly Component 63 can always press the metal coil tightly; when the metal coil is unrolled, the expansion and contraction mechanism 2 rotates clockwise, and the transmission through the reducer 612 and the one-way ratchet gear three 618 can drive the pressure arm assembly 63 to deflect to the side close to the metal coil, and at this time, the pressure arm assembly 63 is in a slow moving state and can match the change of the linear velocity of the metal coil diameter. The expansion and contraction mechanism 2 rotates counterclockwise, and directly transmits through the one-way ratchet gear one 616 without deceleration through the reducer 612, which can drive the pressure arm assembly 63 to quickly deflect to the side away from the metal coil for reset, thereby shortening the operation time.

[0047] Compared with the prior art, the pressure arm assembly 63 is connected to the expansion and contraction mechanism 2 through the transmission assembly 61 and the axial adjustment assembly 62. When the expansion and contraction mechanism 2 drives the metal coil to rotate and unwind, it can synchronously drive the pressure arm assembly 63 to deflect toward the side close to the metal coil, so that the deflection speed of the pressure arm assembly 63 matches the linear speed change of the diameter of the metal coil, thereby ensuring that the pressure arm assembly 63 can always press the metal coil. In addition, through the deceleration of the reducer 612 and the transmission through the one-way ratchet gear on the output shaft, the pressure arm assembly 63 can be driven to move slowly to press the metal coil. Through the one-way ratchet gear transmission on the input shaft of the reducer 612, the quick pressure arm assembly 63 can be driven to deflect in the opposite direction for reset, thereby shortening the operation time.

[0048] As a preferred technical solution of this embodiment, the transmission assembly 61 further includes a speed reducer 612 and a sprocket component 613. The sprocket component 613 is arranged at one end of the input shaft of the speed reducer 612 and is used to transmit power between the speed reducer 612 and the expansion and contraction mechanism 2. The gear set includes a one-way ratchet gear one 616 and a one-way ratchet gear two 617 fixedly sleeved on the input shaft of the speed reducer 612, a one-way ratchet gear three 618 and a one-way ratchet gear four 619 fixedly sleeved on the output shaft of the speed reducer 612, and a transmission gear one 614 and a transmission gear two 615. Specifically, the transmission assembly 61 further includes a mounting bracket which is fixedly installed on the mounting frame 1. The speed reducer 612 and the first electric telescopic rod 611 are both fixedly installed on the mounting bracket. The first electric telescopic rod 611 and the speed reducer 612 are prior arts and are commercially available. The speed reducer 612 is preferably a stepless speed regulation speed reducer. Since the expansion and contraction mechanism 2 needs to unwind metal coils with different thicknesses, the deflection speed of the pressing arm assembly 63 can be adjusted according to the linear speed change of the diameters of metal coils with different thicknesses through the stepless speed regulation speed reducer; the sprocket component 613 is composed of two groups of transmission sprockets and a group of transmission chains. One group of transmission sprockets is sleeved on the input shaft of the speed reducer 612, and the other group of transmission sprockets is sleeved on the support shaft 21 to realize the transmission of power between the expansion and contraction mechanism 2 and the speed reducer 612.

[0049] In an embodiment provided by the present invention, the first transmission gear 614 can be switched by the first electric telescopic rod 611 to engage with the first one-way ratchet gear 616 or the second one-way ratchet gear 617, and the second transmission gear 615 can be switched by the first electric telescopic rod 611 to engage with the third one-way ratchet gear 618 or the fourth one-way ratchet gear 619. The rotation directions of the first one-way ratchet gear 616 and the third one-way ratchet gear 618 are the same, and the rotation directions of the second one-way ratchet gear 617 and the fourth one-way ratchet gear 619 are the same. Specifically, when unwinding the metal coil, the second transmission gear 615 engages with the third one-way ratchet gear 618, and the first transmission gear 614 engages with the first one-way ratchet gear 616. The expansion and contraction mechanism 2 drives the metal coil to rotate clockwise for unwinding. Through the reduction gear 612, the third one-way ratchet gear 618, and the second transmission gear 615 rotate, which can drive the pressing arm assembly 63 to slowly deflect towards the side close to the metal coil. Since the first one-way ratchet gear 616 and the third one-way ratchet gear 618 can only rotate in one direction, no power is transmitted between the first one-way ratchet gear 616 and the first transmission gear 614 at this time; when the expansion and contraction mechanism 2 rotates in reverse, no power is transmitted between the third one-way ratchet gear 618 and the second transmission gear 615 at this time, driving the first one-way ratchet gear 616 and the first transmission gear 614 to rotate, directly driving the pressing arm assembly 63 to quickly deflect away from the side of the metal coil without being decelerated by the reduction gear 612, so that the pressing arm assembly 63 can be quickly reset; the first electric telescopic rod 611 is movably connected to the transmission sleeve 621 through a lever. When winding the metal coil, the first electric telescopic rod 611 drives the transmission sleeve 621 to axially move, so that the second one-way ratchet gear 617 engages with the first transmission gear 614, and the fourth one-way ratchet gear 619 engages with the second transmission gear 615, adjusting the working state of the pressing arm assembly 63. At this time, when the pressing arm assembly 63 moves towards the side close to the expansion and contraction mechanism 2, it is in a fast moving state, and when the pressing arm assembly 63 moves away from the side of the expansion and contraction mechanism 2, it is in a slow moving state, so that the pressing arm assembly 63 can press the metal coil tightly when winding the metal coil.

[0050] In another embodiment provided by the present invention, the axial adjustment assembly 62 includes a driving sleeve 621 and a driving rod 622 that are movably sleeved. The driving rod 622 can slide in the driving sleeve 621 to adjust the position of the pressing arm assembly 63 in the axial direction of the expansion and contraction mechanism 2. The driving sleeve 621 and the driving rod 622 cooperate to transmit torque between the transmission assembly 61 and the axial adjustment assembly 62. Specifically, the driving sleeve 621 is movably installed on the mounting bracket and can move axially under the drive of the first electric telescopic rod 611. The driving sleeve 621 and the driving rod 622 are connected by a spline to ensure that the driving rod 622 can slide inside the driving sleeve 621 and can transmit torque at the same time. An adjustment screw 623 is rotatably installed on the driving sleeve 621, and the adjustment screw 623 is threadedly connected to the driving rod 622. By rotating the adjustment screw 623 to drive the driving rod 622 to move, the position of the pressing arm assembly 63 in the axial direction of the expansion and contraction mechanism 2 can be adjusted to ensure that the pressing arm assembly 63 can press on the middle position of the metal coil.

[0051] In yet another embodiment provided by the present invention, the pressing arm assembly 63 includes a connecting pressing arm 631 and a central pressing roller 632 and side pressing rollers 633 that are movably installed on the connecting pressing arm 631. The side pressing rollers 633 and the central pressing roller 632 are on the same central axis, and a positioning edge 634 is provided at one end of the side pressing roller 633 away from the central pressing roller 632. Specifically, a shaft rod is fixedly installed at one end of the connecting pressing arm 631 away from the axial adjustment assembly 62. The central pressing roller 632 and the side pressing rollers 633 are both movably sleeved on the shaft rod. There are two groups of side pressing rollers 633, which are respectively located at both ends of the central pressing roller 632. The metal coil can be pressed tightly at multiple places through the cooperation of the central pressing roller 632 and the side pressing rollers 633 to avoid damage to the metal coil due to excessive local stress; an electric telescopic rod two 635 is fixedly installed on the connecting pressing arm 631, and the electric telescopic rod two 635 is movably connected to the side pressing roller 633 through a connecting rod. The electric telescopic rod two 635 is a prior art and is commercially available.

[0052] In still another embodiment provided by the present invention, the positioning edge 634 can be driven to move at the end of the central pressing roller 632, and the positioning edge 634 is clamped at the edge position of the metal coil. Specifically, after the pressing arm assembly 63 is integrally adjusted to the center position of the metal coil through the axial adjustment assembly 62, the side pressing roller 633 is driven to move through the electric telescopic rod two 635, and the positioning edge 634 is clamped at the edge position of the end of the metal coil. While ensuring that the side pressing roller 633 can press the metal coil tightly, the metal coil can be restricted by the positioning edge 634, and the deviation correction of the metal coil can be realized.

[0053] In the prior art, the support shaft 21 tightens the metal coil through the support plate assembly 24 that moves radially. However, the surface curvature of the support plate assembly 24 is fixed. However, for metal coils with different hole diameters, the curvature of the inner wall of the holes is different. Therefore, when the existing support plate assembly 24 supports metal coils with different hole diameters, in fact, a single-line contact is formed through the highest point of the support plate assembly 24. Although multiple support plate assemblies 24 distributed annularly can achieve the positioning of the metal coil, there are still problems of poor adhesion and unstable support. In response to this, the following embodiments are proposed to solve this problem.

[0054] In an embodiment provided by the present invention, the expansion and contraction mechanism 2 includes a support shaft 21 movably installed on the installation frame 1, a hydraulic cylinder 23 located at one end of the support shaft 21. A support plate assembly 24 is arranged on the circumferential side of the support shaft 21, and the support plate assembly 24 is in transmission connection with the hydraulic cylinder 23. Specifically, a driving motor 3 is fixedly installed on the top of the installation frame 1 to provide power for the rotation of the support shaft 21. The hydraulic cylinder 23 is rotatably installed in the installation frame 1, and its oil supply is realized through a rotary oil supply structure in the prior art; an outer sleeve 22 is sleeved outside the support shaft 21, and a connecting shaft is passed through the inside. One end of the connecting shaft is fixedly connected to the outer sleeve 22, and the other end is fixedly connected to the output shaft of the hydraulic cylinder 23. The hydraulic cylinder 23 can drive the outer sleeve 22 to move axially through the connecting shaft; the support plate assembly 24 is integrally clamped on the support shaft 21 and can move radially. The support plate assembly 24 is connected to the outer sleeve 22 through a wedge block. When the outer sleeve 22 moves axially, the support plate assembly 24 is driven to move radially through the transmission of the wedge block.

[0055] In another embodiment provided by the present invention, the support plate assembly 24 includes a sector-shaped support plate 241. A cavity is formed in the sector-shaped support plate 241, and a transmission plate 242 is clamped in the cavity, and hydraulic oil is filled on top of the transmission plate 242. A jacking component 244 and an auxiliary support bar 243 are arranged on the side of the sector-shaped support plate 241 away from the support shaft 21. Specifically, when the wedge block drives the sector-shaped support plate 241 to move and its highest point contacts the inner wall of the metal coil, the wedge block continues to drive the transmission plate 242 to move, pushing the hydraulic oil into the jacking component 244, and then pushing out the auxiliary support bar 243 and pressing it against the inner wall of the metal coil to realize tightening the metal coil at multiple positions.

[0056] In another embodiment provided by the present invention, one end of the jacking component 244 is fixedly connected to the auxiliary support bar 243, and the other end is communicated with the cavity inside the sector-shaped support plate 241. When the transmission plate 242 moves in the cavity, it can drive the auxiliary support bar 243 to be jacked out through hydraulic oil transmission with the jacking component 244. Specifically, the auxiliary support bar 243 is clamped on the top of the sector-shaped support plate 241. The jacking component 244 includes a positioning sleeve 2441 which is nested on the top of the sector-shaped support plate 241, a transmission plate 242 which is movably installed inside the positioning sleeve 2441, and a return spring 2443 which is movably sleeved outside the transmission piston 2442. The bottom end of the positioning sleeve 2441 is communicated with the cavity, and the hydraulic oil in the cavity can enter the positioning sleeve 2441 along the bottom of the positioning sleeve 2441 and push the transmission piston 2442 to move. The top end of the transmission piston 2442 is fixedly connected to the auxiliary support bar 243.

[0057] In another embodiment provided by the present invention, the auxiliary support bar 243 is arranged on the sector-shaped support plate 241 along the direction parallel to the support shaft 21, and the auxiliary support bar 243 is located on both sides of the longitudinal bisecting plane of the sector-shaped support plate 241. Specifically, a plurality of auxiliary support bars 243 are arranged on the sector-shaped support plate 241, which can realize multi-line jacking of the metal coil and improve the positioning effect of the metal coil; a plurality of jacking components 244 are arranged at the bottom of the auxiliary support bar 243, and the hydraulic oil in the cavity can apply thrust to the auxiliary support bar 243 at multiple places; the return spring 2443 in the jacking component 244 applies an elastic force to the transmission piston 2442, which can keep the initial position of the transmission piston 2442 stable. When the wedge block drives the sector-shaped support plate 241 to move, a reaction force is applied to the transmission piston 2442 and the hydraulic oil through the return spring 2443, avoiding the movement of the transmission plate 242 in the cavity at this time. After the highest point of the sector-shaped support plate 241 contacts the inner wall of the metal coil, the wedge block continues to drive the transmission plate 242 to move and overcome the elastic force of the return spring 2443 to push the transmission piston 2442 through the hydraulic oil to drive the auxiliary support bar 243 to move.

[0058] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A reeling mechanism for metal coil processing, comprising a mounting frame (1) and an expansion and contraction mechanism (2) arranged on the mounting frame (1), characterized in that: Also includes: A pressing arm mechanism (6) is arranged on the mounting frame (1) and is used to press the metal coiled material sleeved on the outside of the expansion and contraction mechanism (2); The pressing arm mechanism (6) comprises a pressing arm assembly (63) which can be pressed on the surface of the metal coil after being driven; a transmission assembly (61) used to transmit power between the expansion and contraction mechanism (2) and the pressing arm assembly (63); and an axial adjustment assembly (62) used to connect the transmission assembly (61) and the pressing arm assembly (63); The transmission assembly (61) comprises an electric telescopic rod (611) and a gear set. When the expansion and contraction mechanism (2) rotates, the transmission energy is transmitted through the transmission assembly (61) and the axial adjustment assembly (62) to drive the pressure arm assembly (63) to deflect. The electric telescopic rod (611) switches the coordination between different gears in the gear set, and can adjust the deflection direction of the pressure arm assembly (63) and the deflection speed under different deflection directions. The transmission assembly (61) further includes a reducer (612) and a sprocket component (613); The gear set includes a one-way ratchet gear 1 (616) and a one-way ratchet gear 2 (617) fixedly mounted on the input shaft of the reducer (612), a one-way ratchet gear 3 (618) and a one-way ratchet gear 4 (619) fixedly mounted on the output shaft of the reducer (612), and a transmission gear 1 (614) and a transmission gear 2 (615); The transmission gear 1 (614) is switched by the electric telescopic rod 1 (611) to mesh with the one-way ratchet gear 1 (616) or the one-way ratchet gear 2 (617), and the transmission gear 2 (615) is switched by the electric telescopic rod 1 (611) to mesh with the one-way ratchet gear 3 (618) or the one-way ratchet gear 4 (619). The one-way ratchet gear 1 (616) and the one-way ratchet gear 3 (618) have the same rotation direction, and the one-way ratchet gear 2 (617) and the one-way ratchet gear 4 (619) have the same rotation direction.

2. The unwinding mechanism for metal coil processing according to claim 1, characterized in that: The sprocket component (613) is arranged at one end of the input shaft of the reducer (612) and is used to transmit power between the reducer (612) and the expansion and contraction mechanism (2).

3. The unwinding mechanism for metal coil processing according to claim 1, characterized in that: The axial adjustment component (62) comprises a transmission sleeve (621) and a transmission rod (622) which are movable in a sleeve. The transmission rod (622) slides in the transmission sleeve (621) to adjust the position of the pressure arm component (63) along the axial direction of the expansion and contraction mechanism (2). The transmission sleeve (621) and the transmission rod (622) cooperate to transmit torque between the transmission component (61) and the axial adjustment component (62).

4. The unwinding mechanism for metal coil processing according to claim 1, characterized in that: The pressure arm assembly (63) comprises a connecting pressure arm (631), a central pressure roller (632) and a side pressure roller (633) movably mounted on the connecting pressure arm (631); the side pressure roller (633) and the central pressure roller (632) are located on the same central axis, and a positioning flange (634) is provided at one end of the side pressure roller (633) away from the central pressure roller (632).

5. The unwinding mechanism for metal coil processing according to claim 4, characterized in that: The positioning edge (634) is driven to move at the end of the central pressure roller (632), and the positioning edge (634) is clamped at the edge of the metal coil.

6. The unwinding mechanism for metal coil processing according to claim 1, characterized in that: The expansion and contraction mechanism (2) comprises a support shaft (21) movably mounted on the mounting frame (1), a hydraulic cylinder (23) located at one end of the support shaft (21), a support plate assembly (24) provided on the peripheral side of the support shaft (21), and a transmission connection between the support plate assembly (24) and the hydraulic cylinder (23).

7. The unwinding mechanism for metal coil processing according to claim 6, characterized in that: The support plate assembly (24) comprises a fan-shaped support plate (241), a cavity being formed in the fan-shaped support plate (241), a transmission plate (242) being clamped in the cavity, and hydraulic oil being injected at the top of the transmission plate (242), and a lifting component (244) and an auxiliary support bar (243) being provided on a side of the fan-shaped support plate (241) away from the support shaft (21).

8. The unwinding mechanism for metal coil processing according to claim 7, characterized in that: One end of the lifting component (244) is fixedly connected to the auxiliary support bar (243), and the other end is communicated with the cavity inside the fan-shaped support plate (241). When the transmission plate (242) moves in the cavity, the auxiliary support bar (243) can be pushed out through transmission of hydraulic oil and the lifting component (244).

9. The unwinding mechanism for metal coil processing according to claim 8, characterized in that: The auxiliary support strips (243) are arranged on the fan-shaped support plate (241) along a direction parallel to the support shaft (21), and the auxiliary support strips (243) are located on both sides of a longitudinal bisector of the fan-shaped support plate (241).

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