Inner diameter expanding and shrinking disc

Abstract

The invention discloses an inner diameter expanding and shrinking disc which comprises a curling disc body, at least one expanding and shrinking block, a driving assembly and a material head fixing structure. At least one expansion and contraction opening is formed in the periphery of the curling disc body, and the expansion and contraction blocks are movably arranged in the expansion and contraction openings and can move towards the radial outer side or the radial inner side of the curling disc body along the expansion and contraction openings. The driving assembly drives the expansion and contraction block to move in the radial direction to achieve adjustment of the outer diameter of the coiling disc body, it is guaranteed that strips are tightly wound during coiling, a gap is formed through contraction during material taking, rapid material taking is facilitated, a reel does not need to be disassembled, the material taking process is greatly simplified, and the overall efficiency of coiling and material taking is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, specifically relates to a kind of inner diameter's expansion and contraction disc. BACKGROUND

[0002] In the field of strip winding processing, when taking out the material after winding is completed, due to the gravity of the strip itself, and there is a certain degree of shrinkage after winding, which causes the strip to be tightly wound on the reel. At this time, the worker needs to disassemble the strip and the reel together, and then disassemble the reel to finally complete the taking out of the material. The whole taking-out process has many steps and is complicated to operate, which seriously affects the overall efficiency of the strip winding. At the same time, when the traditional reel is used with a disposable paper sleeve, there is also the problem of high material cost and single adaptability, which cannot meet the flexible winding needs of different specifications of the strip.

[0003] Therefore, how to provide a kind of inner diameter's expansion and contraction disc to solve the problems existing in the prior art is of great significance to its application. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a kind of inner diameter's expansion and contraction disc to solve the problems.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A kind of inner diameter's expansion and contraction disc, including curling disc body, at least one expansion and contraction block, drive assembly and material head fixing structure;The outer periphery of the curling disc body is provided with at least one expansion and contraction port, the expansion and contraction block is movably arranged in the expansion and contraction port and can move along the expansion and contraction port to the radial outside or inside of the curling disc body, the drive assembly is in transmission with the expansion and contraction block, and the material head fixing structure is arranged at the edge of the curling disc body;The central region of the curling disc body is provided with a sleeve interface matched with the main shaft of winding machine, the inner diameter of the sleeve interface is 300mm, and the inner wall of the sleeve interface is fixedly embedded with a friction ring.

[0007] As a preferred technical solution of the present application, the drive assembly includes an operating component and a transmission member, one end of the transmission member is connected with the operating component, and the other end is in transmission with the expansion and contraction block, and the operating component can drive the expansion and contraction block to move along the expansion and contraction port through the transmission member. Through this design, a clear power transmission path is formed, which facilitates the movement adjustment of the expansion and contraction block by the operator through the control of the operating component, improves the operation convenience, and at the same time, the structure form of the operating component and the transmission member can be flexibly designed according to the actual needs, which is suitable for different winding scenes.

[0008] As a preferred technical scheme of the present application, the transmission member is a ejector rod, and the operating component is a rotating disc; the rotating disc is fixed in a preset mounting groove of the curling disc body by a pressing plate and can rotate in the mounting groove; a driving hole for driving the rotating disc to rotate is formed in the rotating disc; the outer circumferential surface of the rotating disc is provided as a driving contact surface, one end of the ejector rod is in a relatively slidable and fitted engagement with the driving contact surface, and the other end of the ejector rod is inserted into a guide insertion hole of the expansion and contraction block along the axial direction of the ejector rod and the two constitute a clearance fit. The rotating disc is stably mounted by the pressing plate and can freely rotate, and the driving hole facilitates the driving of the rotating disc to rotate by means of a wrench or the like; the slidable and fitted engagement of the ejector rod with the driving contact surface of the rotating disc can convert the rotary motion of the rotating disc into the axial linear motion of the ejector rod, and the clearance fit of the ejector rod with the guide insertion hole of the expansion and contraction block ensures that the ejector rod can smoothly reciprocate and drive the expansion and contraction block to move radially, so that the power transmission is stable and the structure is compact, and the space layout of the curling disc body is adapted.

[0009] As a preferred technical scheme of the present application, the driving contact surface comprises an arc-shaped guide surface continuously extending along the circumference of the rotating disc, at least one arc-shaped recessed surface is arranged on the circumferential path of the arc-shaped guide surface, the arc-shaped recessed surface is recessed from a preset position of the arc-shaped guide surface towards the center of the rotating disc, and the arc-shaped guide surface and the arc-shaped recessed surface are smoothly and transitionally connected; or the driving contact surface is a helical inclined surface continuously extending along the outer circumferential surface of the rotating disc, the axial height of the helical inclined surface continuously and gradually changes with the circumferential rotation of the rotating disc; the fitting point of the ejector rod moves along the helical track; the end of the helical inclined surface is provided with at least one reset notch, the reset notch is composed of a transition step extending towards the inner side in the radial direction, the axial height of the transition step rapidly and smoothly decreases from the limit driving height of the end of the helical inclined surface to a preset reset height along the inner side in the radial direction, and a guide structure for the radial cutting of the ejector rod is formed to drive the expansion and contraction block to reset.

[0010] The convex-concave type driving track formed by the arc-shaped guide surface and the arc-shaped recessed surface causes the radial position of the fitting point of the ejector rod to change along the track when the rotating disc rotates, thereby pushing the ejector rod to axially displace and realizing the radial movement of the expansion and contraction block; the smooth transition design can avoid the jamming between the ejector rod and the driving contact surface, ensure smooth power transmission, and simultaneously realize the diameter adjustment of the expansion and contraction block in multiple gears by arranging multiple arc-shaped recessed surfaces, so as to adapt to the coiling requirements of different strips.

[0011] The continuous gradual structure of the spiral slope can make the top rod attachment point move along the spiral track stably during the rotation of the rotating disc, and continuously convert the rotary motion into the axial linear motion of the top rod through the guiding effect of the slope, so that the expansion and contraction block moves radially stably, compared with the stepped structure, the outer diameter of the expansion and contraction block can be adjusted steplessly, the diameter requirement during the winding of the strip can be matched more accurately, and the tightness and uniformity of the winding of the strip are ensured; the transition step structure of the reset gap can make the top rod cut into the transition step radially quickly when the expansion and contraction block needs to be driven to reset, so that the top rod is quickly retracted axially and drives the expansion and contraction block to move inward, the diameter of the curling disc body is quickly contracted, the reset operation can be completed without slowly rotating the rotating disc, the preparation time for taking the material is greatly shortened, the taking efficiency is improved, and the smooth transition design avoids the impact between the top rod and the reset gap, and protects the component structure.

[0012] As a preferred technical scheme of the present application, an arc-shaped groove is formed on the inside of the expansion and contraction opening of the curling disc body to form an unloading groove, the unloading groove extends along the inside edge of the expansion and contraction opening and communicates with the expansion and contraction opening; an arc-shaped waist-shaped hole is formed on the diametrically opposite region of the expansion and contraction opening of the curling disc body; the arc-shaped waist-shaped hole is arc-shaped and consistent with the circumferential direction of the curling disc body; the arc-shaped waist-shaped hole and the expansion and contraction opening are symmetrically distributed in the radial section of the curling disc body, and the radial projection of the arc-shaped waist-shaped hole and the radial projection of the arc-shaped unloading groove have no overlapping area. The unloading groove can effectively reduce the structural rigidity of the edge of the expansion and contraction opening, provide sufficient deformation allowance for the expansion and contraction opening when the expansion and contraction block moves to the radial outside and pushes the expansion and contraction opening to expand, avoid cracks or permanent deformation of the curling disc body due to excessive local stress, ensure the structural strength and service life of the curling disc body, and the arc-shaped structure design can disperse stress concentration, further optimize the stress state of the curling disc body; the symmetric distribution of the arc-shaped waist-shaped hole and the expansion and contraction opening and the non-overlapping layout of the unloading groove make their functions not interfere with each other: the arc-shaped waist-shaped hole can reduce the material amount of the curling disc body, realize lightweight design, and facilitate the operator to hold or insert tools, assisting in taking and placing the expansion and contraction disc; the unloading groove focuses on providing deformation allowance for the expansion and contraction opening to ensure the normal movement of the expansion and contraction block and optimize the comprehensive performance of the curling disc body.

[0013] As a preferred technical scheme of the present application, the curling disc body is provided with a plurality of strain grooves, the strain grooves are arranged in an arc array to form a plurality of strain groove groups, wherein the strain groove groups respectively extend along the outer periphery of the curling disc body and are synchronously distributed along the extension direction of the unloading groove; the strain grooves are all integrally communicated by a circular groove segment and a straight groove segment, wherein the groove diameter of the circular groove segment is greater than the groove width of the straight groove segment; the straight groove segment of the strain groove distributed along the outer periphery extends in a direction away from the central axis of the curling disc body and penetrates the outer peripheral wall of the curling disc body; the straight groove segment of the strain groove distributed along the unloading groove is tangentially communicated with the inner side groove wall of the unloading groove. The distribution form of the plurality of strain groove groups can disperse the local stress of different regions when the expansion and contraction opening expands; the strain groove along the outer periphery can disperse the stress of the outer peripheral wall; the strain groove along the unloading groove can further disperse the stress around the unloading groove; the structural design of the circular groove segment and the straight groove segment can avoid the concentration of stress at the end of the groove body; the design of penetrating the outer peripheral wall and being tangentially communicated with the unloading groove ensures that the strain groove can fully play a stress dispersion role, improves the structural adaptability of the curling disc body to the radial movement of the expansion and contraction block, and prolongs the service life.

[0014] As a preferred technical scheme of the present application, the guiding assembly comprises at least one guiding screw; the side of the curling disc body facing the expansion and contraction block is provided with a threaded mounting portion, the mounting portion penetrates the unloading groove and partially extends into the expansion and contraction opening; one end of the guiding screw is threadedly connected with the internal thread of the mounting portion, the other end extends along the radial direction of the curling disc body and is inserted into the axial guide hole of the expansion and contraction block and the two constitute a clearance fit. The threaded connection of the guiding screw and the mounting portion realizes the stable fixation of the guiding assembly, the clearance fit of the guiding screw and the axial guide hole of the expansion and contraction block can provide accurate guidance for the radial movement of the expansion and contraction block, limit the deviation of the expansion and contraction block in the direction other than the radial direction, ensure that the expansion and contraction block always moves smoothly and linearly along the expansion and contraction opening, avoid the deviation of the strip winding or the structural jam caused by the deviation of the expansion and contraction block, and improve the winding stability.

[0015] As a preferred technical scheme of the present application, the material head fixing structure is a material head clamping opening, the material head clamping opening is at least provided with two and is uniformly distributed along the outer periphery of the curling disc body; the material head clamping opening is a straight groove structure radially opened along the outer periphery of the curling disc body and penetrates the outer peripheral wall of the curling disc body. The plurality of uniformly distributed material head clamping openings can flexibly select the fixing point according to the winding starting position of the strip, and improve the operation flexibility; the straight groove structure radially opened and penetrating the outer peripheral wall can facilitate the rapid insertion of the starting end of the strip into the clamping opening, and stably fix the strip by the clamping force of the groove wall of the clamping opening, avoid the material head from falling off or deviating in the initial stage of winding, and at the same time, the straight groove structure is simple to process and can adapt to the fixing needs of strips of different thicknesses.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. Efficiency improvement: The radial movement of the expansion and contraction block driven by the drive assembly realizes the adjustment of the outer diameter of the curling disc body. When winding, the expansion and contraction block extends to ensure that the strip is tightly wound. When taking material, the expansion and contraction block shrinks to form a gap between the curling disc body and the inner diameter of the strip. Without disassembling the reel, the material can be quickly taken, greatly simplifying the material taking process and improving the overall efficiency of winding and material taking.

[0018] 2. Stable structure: The structural design of the unloading groove and the strain groove can effectively disperse the local stress of the curling disc body, avoiding structural damage. The guide assembly ensures smooth movement of the expansion and contraction block. The friction ring increases the static friction between the curling disc body and the main shaft of the winding machine, ensuring stable power transmission. The material head clamp stably fixes the starting end of the strip, and the multi-component collaborative lifting device improves the overall structural stability and service life.

[0019] 3. Cost optimization and strong adaptability: The device can replace traditional reels and disposable paper sleeves, reducing material costs. It can adapt to the winding of medium-thick strips with a thickness of >.mm without a core, and can adapt to different winding requirements through multi-gear or stepless adjustment. The arc waist-shaped hole facilitates taking and placing, improving operational convenience and adapting to the needs of large-scale production of slitting production lines.

[0020] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the contents of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following will be described in detail with the preferred embodiments of the present application and the accompanying drawings.

[0021] According to the detailed description of the specific embodiments of the present application below in combination with the drawings, those skilled in the art will better understand the above and other purposes, advantages and features of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 is the front view of the present embodiment, mainly showing the overall structure;

[0024] Figure 2 is the perspective view of the present embodiment, mainly showing the overall structure;

[0025] Figure 3 is the partial exploded view of the present embodiment, mainly showing the drive assembly;

[0026] Figure 4 is a partial exploded view of the present embodiment, mainly showing the specific structure of the rotating disc, expansion and contraction block and expansion and contraction port;

[0027] Figure 5 is a partial exploded view of the present embodiment, mainly showing the spiral slope and reset notch;

[0028] Figure 6 is a partial enlarged view of the present embodiment, mainly showing the strain groove and unloading groove.

[0029] In the figure: 1, curling disc body; 11, expansion and contraction port; 111, sliding block; 12, expansion and contraction block; 121, guide insertion hole; 122, axial guide hole; 123, sliding groove; 13, unloading groove; 14, arc waist-shaped hole; 15, strain groove; 151, circular groove section; 152, straight groove section; 16, sleeve interface; 161, friction ring; 181, mounting part; 182, guide screw; 18, mounting groove; 19, pressing plate; 20, rotating disc; 21, arc-shaped guide surface; 211, arc-shaped recessed surface; 22, spiral slope; 221, reset notch; 23, driving groove; 24, ejector rod; 25, material head clamping opening. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, in order to be clear and concise, the description of known functions and structures is omitted in the embodiments.

[0031] In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0032] The term "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, B exists alone, and A and B exist simultaneously. The term "and" herein is a description of another association relationship of the associated objects, which means that there can be two relationships, for example, A and B can mean that A exists alone, and A and B exist simultaneously. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0033] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0034] Please see Figures 1-3 This invention provides a technical solution for an expanding and contracting disc with an inner diameter:

[0035] The expansion and contraction plates are available in sizes of 300mm, 400mm, and 500mm.

[0036] Example

[0037] A 300mm inner diameter expansion and contraction disk, see reference. Figure 1 and Figure 2 This invention discloses a strip shrinking steel disc for a winding machine, mainly used in slitting production lines. It is suitable for winding strips with a thickness > 0.5mm and can replace traditional reels to achieve coreless winding, or be used in conjunction with paper sleeves. The shrinking steel disc is mounted on the main shaft of the winding machine. By adjusting its outer diameter, it achieves tight winding and convenient material removal of the strip, effectively solving the problems of cumbersome material removal steps and low efficiency in traditional winding devices. It includes a coiling disc body 1, an expansion / contraction block 12, a drive assembly, a material head fixing structure, and a guide assembly. These components work together to achieve outer diameter adjustment and strip winding functions.

[0038] The coil body 1 is a circular disc structure and serves as the basic load-bearing component of the entire shrinking steel disc. A sleeve interface 16, adapted to the main shaft of the winding machine, is provided in its central region. A friction ring 161, such as a rubber friction ring 161 or a metal friction ring 161, is fixedly embedded in the inner wall of the sleeve interface 16. The friction ring 161 increases the static friction between the coil body 1 and the main shaft of the winding machine, ensuring that the coil body 1 can rotate synchronously with the main shaft of the winding machine, thus achieving stable transmission.

[0039] At least one expansion and contraction opening 11 is uniformly provided on the outer periphery of the coiled disc body 1 along the circumferential direction, preferably one opening. The expansion and contraction opening 11 extends radially along the coiled disc body 1 to provide a moving channel for the expansion and contraction block 12.

[0040] To accommodate the radial movement of the expansion and contraction block 12 and optimize structural stiffness, an arc-shaped groove is formed on the inner side of each expansion and contraction port 11 on the coiled disc body 1 as an unloading groove 13. The unloading groove 13 extends along the inner side of the expansion and contraction port 11 and communicates with the expansion and contraction port 11. By reducing the structural stiffness of the edge of the expansion and contraction port 11, the unloading groove 13 provides the expansion and contraction port 11 with a deformation allowance for radial expansion, thus preventing rigid damage to the coiled disc body 1 when the expansion and contraction block 12 moves.

[0041] The arc-shaped waist-shaped hole 14 is arranged on the curling disc body 1 at a region radially opposite to the expansion and contraction opening 11, has an arc-shaped arrangement along the circumferential direction of the curling disc body 1, is symmetrically distributed with the expansion and contraction opening 11 in the radial section of the curling disc body 1, and has a radial projection that does not overlap with the radial projection of the unloading groove 13. This design realizes the light weight of the curling disc body 1 on the one hand, and makes the arc-shaped waist-shaped hole 14 and the unloading groove 13 respectively independently play functions through the non-overlapping layout on the other hand. The arc-shaped waist-shaped hole 14 is convenient for an operator to hold or use a tool to assist in taking out the steel disc, and the unloading groove 13 is focused on providing a deformation allowance.

[0042] With reference to Figure 1 , Figure 2 and Figure 6 In addition, a plurality of strain grooves 15 are arranged on the curling disc body 1, the strain grooves 15 are arranged in an arc-shaped array to form a plurality of groups of strain grooves 15, one group of strain grooves 15 extends along the outer periphery of the curling disc body 1, and another group of strain grooves 15 is synchronously distributed along the extension direction of the unloading groove 13. Each strain groove 15 is integrally communicated by a circular groove segment 151 and a straight groove segment 152, wherein the groove diameter of the circular groove segment 151 is greater than the groove width of the straight groove segment 152. Specifically, the straight groove segment 152 of the strain groove 15 distributed along the outer periphery extends in a direction away from the central axis of the curling disc body 1 and penetrates the outer peripheral wall of the curling disc body 1; the straight groove segment 152 of the strain groove 15 distributed along the unloading groove 13 is tangentially communicated with the inner groove wall of the unloading groove 13. The strain groove 15 disperses the local stress when the expansion and contraction opening 11 expands, avoids cracks of the curling disc body 1 due to stress concentration, and improves the structural adaptability of the curling disc body 1 to the radial movement of the expansion and contraction block 12.

[0043] With reference to Figure 3 and Figure 4 The expansion and contraction block 12 corresponds to the expansion and contraction opening 11, has an outer shape matched with the expansion and contraction opening 11, and is movably arranged in the expansion and contraction opening 11. The expansion and contraction block 12 can move along the expansion and contraction opening 11 to the radial outside or inside of the curling disc body 1, so as to change the overall outer diameter of the curling disc body 1. In this embodiment, a sliding groove 123 is further arranged on the expansion and contraction block 12, and cooperates with the sliding block 111 arranged at the expansion and contraction opening 11 to form a sliding connection pair, so that the sliding of the expansion and contraction block 12 and the expansion and contraction opening 11 is smoother.

[0044] With reference to Figure 3 and Figure 4 A guide insertion hole 121 is arranged on the side of the expansion and contraction block 12 facing the center of the curling disc body 1, and is used for cooperating with the top rod 24 of the driving assembly. At the same time, an axial guide hole 122 is further arranged on the expansion and contraction block 12, and is used for cooperating with the guide screw 182 of the guide assembly.

[0045] With reference to Figure 3 and Figure 4The driving assembly is used to drive the expansion and contraction block 12 to move along the expansion and contraction opening 11, and includes an operating component and a transmission member. The operating component is a rotating disc 20, and the transmission member is a top rod 24. The rotating disc 20 is pressed and fixed in a preset mounting groove 18 of the curling disc body 1 through a pressing plate 19, and the pressing plate 19 is fixedly connected with the curling disc body 1 through a bolt, so that the rotating disc 20 can freely rotate in the mounting groove 18 but cannot axially move. A driving hole is formed in the rotating disc 20, and the driving hole is an internal hexagonal hole, so as to facilitate the insertion and driving of a wrench or the like to rotate the rotating disc 20.

[0046] With reference to Figure 3 and Figure 4 , an outer circumferential surface of the rotating disc 20 is provided as a driving contact surface, and the driving contact surface is in a relatively slidable and fitted cooperation with one end of the top rod 24, so as to realize the axial thrust transmission of the top rod 24 when the rotating disc 20 rotates. Specifically, the driving contact surface can adopt two structural forms. The first form is an arc-shaped guide surface 21 continuously extending along the circumferential direction of the rotating disc 20, and at least one arc-shaped recessed surface 211 is arranged on the circumferential path of the arc-shaped guide surface 21, and the arc-shaped recessed surface 211 is recessed from a preset position of the arc-shaped guide surface 21 to the center direction of the rotating disc 20. The arc-shaped guide surface 21 and the arc-shaped recessed surface 211 are smoothly and transitionally connected, and when the rotating disc 20 rotates, the axial fitting point of the top rod 24 rotates along with the rotating disc 20 to pass through the arc-shaped guide surface 21 and the arc-shaped recessed surface 211, and the radial position changes are generated through the radial height difference of the convex-concave type driving track, and then the rotational motion of the rotating disc 20 is converted into the axial displacement of the top rod 24 along the axial direction of the top rod 24, so as to drive the expansion and contraction block 12 to move along the radial direction of the curling disc body 1.

[0047] With reference to Figure 5 , the second form is a helical inclined surface 22 continuously extending along the outer circumferential surface of the rotating disc 20, and the axial height of the helical inclined surface 22 continuously and gradually changes along with the circumferential rotation of the rotating disc 20. When the rotating disc 20 rotates, the fitting point of the top rod 24 moves along the helical track of the helical inclined surface 22, and the rotational motion of the rotating disc 20 is converted into the axial linear motion of the top rod 24 through the guiding action of the helical inclined surface 22, so as to drive the expansion and contraction block 12 to move. Further, the end of the helical inclined surface 22 is provided with at least one reset notch 221, and the reset notch 221 is composed of a transition step extending to the radial inner side, and the axial height of the transition step rapidly and smoothly decreases from the limit driving height of the end of the helical inclined surface 22 to a preset reset height along the radial inner side, so as to form a guide structure for the radial cutting of the top rod 24, so as to quickly drive the expansion and contraction block 12 to reset when the material is taken out.

[0048] With reference to Figure 4, one end of the ejector rod 24 is attached to the driving contact surface of the rotating disc 20, and the other end is inserted into the guide insertion hole 121 of the expansion block 12 along the axis direction, and the outer periphery of the ejector rod 24 is in clearance fit with the inner wall of the guide insertion hole 121, so that the ejector rod 24 can slide along the axis direction of the guide insertion hole 121, and then drive the expansion block 12 to move along the radial direction of the curling disc body 1.

[0049] Referring to Figure 1 and Figure 2 , the material head fixing structure is a material head clamp 25 for fixing the starting end of the strip. The material head clamp 25 is provided with at least two, preferably spaced apart from the expansion block 12, and uniformly distributed along the outer periphery of the curling disc body 1. The material head clamp 25 is a straight slot structure radially opened along the outer periphery of the curling disc body 1, and penetrates the outer peripheral wall of the curling disc body 1, and the slot width is slightly larger than the thickness of the strip, so that the starting end of the strip can be stably clamped and not easily fall off.

[0050] Referring to Figure 4 , the guide assembly is used to limit the movement direction of the expansion block 12, and ensure that it only moves along the radial direction, including at least one guide screw 182, and the embodiment preferably two. The side of the curling disc body 1 facing the expansion block 12 is provided with a threaded mounting portion 181, the mounting portion 181 penetrates the unloading groove 13 and partially extends into the expansion opening 11. One end of the guide screw 182 is in threaded connection with the internal thread of the mounting portion 181, and the other end extends along the radial direction of the curling disc body 1 and is inserted into the pre-set axial guide hole 122 of the expansion block 12, and the guide screw 182 and the inner wall of the axial guide hole 122 form a clearance fit. Through the sliding fit of the guide screw 182 and the axial guide hole 122, the guide assembly can limit the deviation of the expansion block 12 in the direction other than the radial direction, and guide the expansion block 12 to make linear reciprocating motion along the expansion opening 11.

[0051] The implementation principle of the embodiment is:

[0052] In the winding preparation stage, the operator sets the shrinkable steel disc on the main shaft of the winding machine, and through the close cooperation of the friction ring 161 in the sleeve interface 16 and the main shaft, it is ensured that the two can rotate synchronously. Subsequently, the operator inserts a tool such as a wrench into the driving hole of the rotating disc 20 and rotates the rotating disc 20, so that the driving assembly drives the expansion block 12 to move outward along the radial direction. In this process, the guide screw 182 of the guide assembly slides along the axial guide hole 122 of the expansion block 12 synchronously, limiting the deviation of the expansion block 12, ensuring its smooth movement; at the same time, the expansion opening 11 is slightly expanded under the push of the expansion block 12, and the unloading groove 13 and the strain groove 15 disperse stress through deformation, avoiding damage to the curling disc body 1.

[0053] In the strip coiling stage, the starting end of the cut strip is inserted into the material head clamp 25, and the clamping force of the clamp is used to fix the strip. Since the width of the cut strip is greater than the width of the coiling disc body, it is generally controlled to be 1-2 mm on one side, so as to avoid friction damage between the edge of the strip and the coiling disc body 1 during the coiling process. Start the winding machine, rotate the main shaft of the winding machine, and drive the coiling disc body 1 to rotate synchronously through the friction ring 161, and the strip is gradually wound on the outer periphery of the coiling disc body 1 (the outer periphery formed when the expansion and contraction block 12 is in the extended state). As the number of layers of the strip coiling increases, the expansion and contraction block 12 always remains in the extended state, ensuring that the strip is tightly wound to form a coil.

[0054] In the material taking stage, after the strip coiling is completed, the strip coil and the shrink steel disc are taken out from the main shaft of the winding machine as a whole. At this time, due to the gravity of the strip itself and the shrinkage after winding, the strip is tightly wound on the shrink steel disc, and the shrink steel disc needs to be taken out through the following steps:

[0055] The operator inserts a tool into the drive hole of the rotating disc 20 and reversely rotates the rotating disc 20, so that the drive assembly drives the expansion and contraction block 12 to move radially inward. As the expansion and contraction block 12 moves inward, the outer diameter of the coiling disc body 1 gradually decreases, and a gap is formed between the outer diameter of the coiling disc body 1 and the inner diameter of the strip coil. At this time, the operator can easily take out the shrink steel disc from the strip coil by holding the arc-shaped waist-shaped hole 14 or using a tool to pass through the waist-shaped hole, and the material taking process is completed.

[0056] The above only describes the preferred embodiments of the present application, and does not limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and variations. Any changes, modifications, replacements, integrations and parameter changes to these embodiments within the spirit and principles of the present application, which can realize the same functions without departing from the principles and spirit of the present application, fall within the protection scope of the present application.

Claims

1. A disc with an inner diameter that expands and contracts, characterized in that, The device includes a winding disc body (1), at least one expansion and contraction block (12), a drive assembly, and a material head fixing structure (25). The outer periphery of the winding disc body (1) is provided with at least one expansion and contraction opening (11). The expansion and contraction block (12) is movably disposed within the expansion and contraction opening (11) and can move radially outward or inward along the expansion and contraction opening (11) towards the winding disc body (1). The drive assembly is connected to the expansion and contraction block (12) in a transmission manner. The material head fixing structure (25) is disposed at the edge of the winding disc body (1). The central area of ​​the winding disc body (1) is provided with a sleeve interface (16) adapted to the main shaft of the winding machine. The inner diameter of the sleeve interface (16) is mm. A friction ring (161) is fixedly embedded in the inner wall of the sleeve interface (16).

2. The expanding and contracting disc with an inner diameter according to claim 1, characterized in that, The drive assembly includes an operating component and a transmission component. One end of the transmission component is connected to the operating component, and the other end is connected to the expansion block (12). The operating component can drive the expansion block (12) to move along the expansion port (11) through the transmission component.

3. The expanding and contracting disc with an inner diameter according to claim 2, characterized in that, The transmission component is a push rod (24), and the operating component is a turntable (20). The turntable (20) is pressed and fixed in the mounting groove (18) of the coiled disc body (1) by a pressure plate (19) and can rotate in the mounting groove (18). The turntable (20) is provided with a drive hole for driving the turntable (20) to rotate. The outer peripheral surface of the turntable (20) is set as a drive contact surface. One end of the push rod (24) forms a sliding fit with the drive contact surface. The other end of the push rod (24) is inserted into the guide hole (121) of the expansion block (12) along its own axis and the two form a clearance fit.

4. The expanding and contracting disc with an inner diameter according to claim 3, characterized in that, The driving contact surface includes an arc-shaped guide surface (21) that extends continuously along the circumference of the turntable (20). At least one arc-shaped recessed surface (211) is provided on the circumferential path of the arc-shaped guide surface (21). The arc-shaped recessed surface (211) is formed by recessing from a preset position of the arc-shaped guide surface (21) toward the center of the turntable (20). The arc-shaped guide surface (21) and the arc-shaped recessed surface (211) are smoothly connected. Alternatively, the driving contact surface is a spiral inclined surface (22) that extends continuously along the outer circumference of the turntable (20). The axial height of the spiral inclined surface (22) is... The degree of rotation of the turntable (20) is continuously and gradually changing; the contact point between the push rod (24) and the spiral inclined surface (22) moves along the spiral trajectory; the end of the spiral inclined surface (22) is provided with at least one reset notch (221), which is composed of a transition step extending radially inward. The axial height of the transition step is rapidly and smoothly reduced from the limit driving height at the end of the spiral inclined surface (22) to the preset reset height, forming a guide structure for the push rod (24) to cut radially in, so as to drive the expansion block (12) to reset.

5. The expanding and contracting disc with an inner diameter according to claim 1, characterized in that, An arc-shaped groove is formed on the inner side of the expansion and contraction port (11) of the coiled disc body (1) to form an unloading groove (13). The unloading groove (13) extends along the inner side of the expansion and contraction port (11) and communicates with the expansion and contraction port (11). An arc-shaped waist-shaped hole (14) is formed on the radial opposite side of the expansion and contraction port (11) of the coiled disc body (1). The arc-shaped waist-shaped hole (14) has an arc-shaped direction and is consistent with the circumferential direction of the coiled disc body (1). The arc-shaped waist-shaped hole (14) and the expansion and contraction port (11) are symmetrically distributed on the radial section of the coiled disc body (1), and its radial projection has no overlapping area with the radial projection of the arc-shaped unloading groove (13).

6. The expanding and contracting disc with an inner diameter according to claim 5, characterized in that, The coiled disc (1) is provided with a plurality of strain grooves (15), which are arranged in an arc-shaped array to form multiple groups of strain grooves. The strain groove groups extend along the outer periphery of the coiled disc (1) and are synchronously distributed along the extension direction of the unloading groove (13). Each strain groove (15) is formed by an integral connection of a circular groove segment (151) and a straight groove segment (152). The diameter of the circular groove segment (151) is larger than the width of the straight groove segment (152). The straight groove segment (152) of the strain groove (15) distributed along the outer periphery extends in a direction away from the central axis of the coiled disc (1) and penetrates the outer periphery of the coiled disc (1). The straight groove segment (152) of the strain groove (15) distributed along the unloading groove (13) is tangentially connected to the inner wall of the unloading groove (13).

7. The expanding and contracting disc with an inner diameter according to claim 1, characterized in that, It also includes a guide assembly, which includes at least one guide screw (182); the coiled disc body (1) has a mounting part (181) with internal threads protruding on one side facing the expansion block (12), the mounting part (181) passes through the unloading groove (13) and extends partially into the expansion port (11); one end of the guide screw (182) is threadedly connected to the internal thread of the mounting part (181), and the other end extends radially along the coiled disc body (1) and is inserted into the pre-set axial guide hole (122) of the expansion block (12), and the two form a clearance fit.

8. The expanding and contracting disc with an inner diameter according to claim 1, characterized in that, The material head fixing structure (25) is a material head clamp, and there are at least two material head clamps that are evenly distributed in a circle along the outer periphery of the coiled disc (1). The material head clamp is a straight groove structure that is radially opened along the outer periphery of the coiled disc (1) and penetrates the outer periphery of the coiled disc (1).

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