Chuck structure and traction winding device

Abstract

The embodiment of the application provides a chuck structure and traction winding equipment, and relates to the technical field of film production. The chuck structure is used for fixing the end of a winding roller. The end surface of the winding roller has an insertion hole. The inner diameter of the insertion hole gradually increases from the end surface to the other end. The chuck structure comprises a chuck base and a chuck. The material of the chuck is polytetrafluoroethylene. The chuck is axially sleeved on the top of the chuck base. The outer diameter of the chuck gradually increases from the top end to the bottom end. The chuck can be inserted into the insertion hole of the winding roller. The chuck structure and the traction winding equipment can improve the fixing effect of the winding roller, and can improve the winding quality and the winding rate.

Description

Technical Field

[0001] This application relates to the field of thin film production technology, and more specifically, to a clamp structure and a traction winding device. Background Technology

[0002] Biaxially oriented polypropylene (BOPP) film is generally a multi-layer co-extruded film. It is made by co-extruded polypropylene granules into sheets, and then stretching them in both the transverse and longitudinal directions. This type of film has advantages such as good physical stability, mechanical strength, airtightness, high transparency and gloss, and toughness and wear resistance. The production process of BOPP film typically involves the following steps: melt extrusion, filtration, stretching, edge trimming, corona treatment, winding, and packaging. Among these, the winding step is a crucial one, directly affecting the quality of the BOPP film.

[0003] Currently, traction winding equipment is commonly used for film winding. The winding roller in the traction winding equipment rotates, causing the film to wind into a cylindrical shape. The two ends of the winding roller are fixed by clamps and rotate synchronously. Traditional traction winding equipment uses iron clamps to ensure effective fixation of the winding roller. However, iron clamps have the following drawbacks: First, the surface friction coefficient of iron clamps is as high as 0.4~0.6, requiring additional tension during winding to counteract frictional resistance, easily causing film stretching and deformation, affecting the physical and electrical properties of the film product; Second, iron is chemically reactive and easily oxidizes and rusts in humid, acidic, or alkaline industrial environments, further increasing the surface roughness of the clamps and causing scratches on the film surface. In the production of high-precision film materials, this directly reduces the product qualification rate; Third, iron clamps have a high density (approximately 7.8 g / cm³). 3 The large weight and high inertia during high-speed rotation exacerbate the load on the drive system, leading to increased energy consumption and limiting the increase in winding speed.

[0004] Therefore, the chucks in the traction winding equipment need to be designed to meet the usage requirements. Utility Model Content

[0005] The purpose of this application is to provide a clamp structure and a traction winding device that provides good fixation for the winding roller and can improve winding quality and speed.

[0006] In a first aspect, embodiments of this application provide a clamping structure for fixing the end of a take-up roller, wherein the end face of the take-up roller has an insertion hole, the inner diameter of which gradually increases from the end face to the other end, and the clamping structure includes: Chuck base; The chuck is made of polytetrafluoroethylene and is sleeved on the top of the chuck base along its axial direction. The outer diameter of the chuck gradually increases from the top to the bottom and the chuck can be fitted into the insertion hole of the take-up roller.

[0007] In the above implementation process, structurally, the chuck structure adopts a split modular structure. The chuck is mainly fixed via a chuck base, which connects the chuck to the drive end of the drive device, enabling the chuck to receive driving force. The chuck provides a direct contact surface for clamping the take-up roller, stabilizing its clamping action. Furthermore, in this embodiment, the shape of the chuck matches the shape of the insertion hole, and the outer diameter of the chuck gradually increases from the top to the bottom, while the inner diameter of the insertion hole gradually increases from one end to the other. This variable-diameter, matching design makes it very easy to insert the chuck into the insertion hole, resulting in good fixation of the take-up roller. In terms of material, the chuck, which directly contacts and acts on the take-up roller, is made of polytetrafluoroethylene (PTFE), which has advantages such as a low coefficient of friction, good chemical stability, high-temperature resistance, and light weight. Therefore, using the chuck structure of this embodiment to fix the end of the take-up roller for winding the material can improve winding quality and speed.

[0008] In one possible implementation, the insertion hole on the end face of the take-up roller is frustoconical, and the opening of the insertion hole is larger than the bottom of the insertion hole; the chuck is frustoconical, and the top surface of the chuck is smaller than the bottom surface of the chuck.

[0009] In the above implementation process, it is easy to process and the fit between the insertion hole and the chuck is good.

[0010] In one possible implementation, it further includes a chuck cover plate that covers the top surface formed by the chuck and the chuck base, and allows the chuck and the chuck cover plate to be fitted together into the insertion hole of the take-up roller.

[0011] In the above process, the chuck and the chuck base are fixed together by the chuck cover plate, which improves the efficiency of disassembly and assembly.

[0012] In one possible implementation, the chuck cover plate is fixed to the chuck base by a plurality of fasteners, all of which are evenly distributed around the axial direction.

[0013] In the above implementation process, the function of the fastener is to limit and fix the chuck to the chuck base. In addition, the concentricity of the chuck structure as a whole can be adjusted by adjusting the counterweight of the fastener.

[0014] In one possible implementation, the top surface formed by the chuck and the chuck base is provided with a positioning groove, the positioning groove surrounding the top of the chuck base; the chuck cover is sleeved on the top of the chuck base and is engaged with the positioning groove.

[0015] In the above implementation process, the clamp cover plate has a good fixing effect.

[0016] In one possible implementation, the chuck base includes a base and a connecting portion disposed on the base, the base and the connecting portion are coaxial, and the outer diameter of the connecting portion is smaller than the outer diameter of the base, the inner ring shape of the chuck matches the outer ring shape of the connecting portion, and the inner ring of the chuck is sleeved on the connecting portion.

[0017] In one possible implementation, the base and the connecting part are integrally formed; and / or, both the base and the connecting part are cylindrical; and / or, the side of the chuck base is provided with a notch for mounting the positioning pin assembly.

[0018] In the above implementation process, the notch is used to install the positioning pin assembly, which is used to position the take-up roller.

[0019] In one possible implementation, the chuck base has an insertion channel inside for inserting the drive end, the insertion channel being arranged axially thereon.

[0020] In one possible implementation, the insertion channel is designed as a through hole and is divided into an oil injection section and an insertion section from top to bottom, with the inner diameter of the oil injection section being larger than the inner diameter of the insertion section.

[0021] Secondly, this application provides a traction winding device, which includes a support frame, on which a winding roller is provided. The two ends of the winding roller are respectively clamped and fixed by a clamping structure of the first embodiment, and the clamping structure rotates coaxially with the winding roller.

[0022] In one possible implementation, at least one end of the take-up roller is further provided with a positioning pin assembly, the positioning pin assembly being fixed to the chuck structure at the same end and capable of rotating synchronously, and the top of the positioning pin assembly abutting against the end face of the take-up roller to achieve positioning of the take-up roller.

[0023] In one possible implementation, the locating pin assembly includes a locating pin block and a locating pin, wherein the locating pin is inserted into the locating pin block at its bottom along the axial direction, and the locating pin extends out at its top along the axial direction and is telescopically disposed relative to the locating pin block; the side of the chuck base is provided with a notch that matches the locating pin block, the locating pin block is embedded in the notch and fixed together, and the locating pin is kept parallel to the axial direction of the chuck. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a clamp structure provided in the first embodiment of this application; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 1 Top view; Figure 4 for Figure 1 Schematic diagram of the structure of the center clamp base; Figure 5 for Figure 4 A sectional view; Figure 6 This is a schematic diagram of a clamp structure provided in the second embodiment of this application; Figure 7 for Figure 6 A structural diagram from another perspective; Figure 8 for Figure 6 A sectional view; Figure 9 for Figure 6 Top view of the center chuck base; Figure 10 This is an assembly diagram of the winding roller and the chuck base in a traction winding device provided in an embodiment of this application.

[0026] Icons: 100-Chuck structure; 110-Chuck base; 111-Base; 112-Connecting part; 113-Extension part; 114-Insertion section; 115-Oil injection section; 120-Chuck; 130-Chuck cover plate; 140-Fastener; 200-Chuck structure; 210-Chuck base; 211-Notch; 220-Positioning pin assembly; 221-Positioning pin block; 222-Positioning pin; 300-Take-up roller; 310-Intercepting hole; 320-Positioning groove. Detailed Implementation

[0027] In traditional traction winding equipment, the iron chuck, as the core fixing component, faces significant technical bottlenecks.

[0028] Firstly, the coefficient of friction is relatively high: the coefficient of friction between the iron chuck and the material being wound is relatively high, reaching 0.4 to 0.6. During the winding process, additional tension needs to be applied to counteract the frictional resistance, which can easily cause the material to stretch and deform, affecting the material's physical and electrical properties.

[0029] Secondly, it is prone to corrosion: Iron is chemically active, and iron chucks are prone to rust and corrosion in harsh working environments, such as humid, acidic, or alkaline environments. This not only affects the appearance of the chuck but also reduces its mechanical properties and service life, thereby affecting the stability and reliability of the entire traction and winding equipment. In addition, the surface roughness of the chuck increases further due to rust, which can easily cause scratches or wear on the surface of the material being wound during the winding process. This wear is especially serious for materials with high surface quality requirements, and it can severely affect the quality of the product, directly reducing the pass rate of high-precision material products.

[0030] Thirdly, it is relatively heavy: the iron chuck has a high density (approximately 7.8 g / cm³). 3 The weight is relatively large, and the inertia of the iron chuck in the high-speed traction winding equipment will increase the load on the equipment and put great pressure on the drive system and bearings. This may not only increase energy consumption, but also affect the accuracy of the equipment and limit the increase of winding speed.

[0031] In practical applications, existing traction winding equipment uses iron chucks. During the winding process, due to the extremely high requirements for film surface quality, the iron chucks are prone to rust stains and have a large coefficient of friction, resulting in about 5% of film products having defects such as surface scratches and wrinkles, which seriously affects the product yield.

[0032] Therefore, due to the limitations of traditional iron chucks, such as high friction coefficient, easy corrosion, and heavy weight, it is necessary to optimize and modify their structure so that they can not only ensure good fixation of the winding roller, but also solve the above-mentioned problems, thereby improving winding quality and speed.

[0033] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and 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 application.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] First Embodiment Please refer to Figures 1-3 and combined Figure 10 This embodiment provides a chuck structure 100 for fixing the end of a take-up roller 300. The end face of the take-up roller 300 has an insertion hole 310. The inner diameter of the insertion hole 310 gradually increases from the end face to the other end. The chuck structure 100 includes a chuck base 110 and a chuck 120. The chuck 120 is made of polytetrafluoroethylene. The chuck 120 is sleeved on the top of the chuck base 110 along its axial direction. The outer diameter of the chuck 120 gradually increases from the top end to the bottom end, and the chuck 120 can be fitted into the insertion hole 310 of the take-up roller 300.

[0041] In this embodiment, for ease of description, the top and bottom of the chuck structure 100 refer to its orientation when its axial direction is vertical, and are not limited to its orientation after the chuck structure 100 is installed. In practical applications, after the chuck structure 100 is installed, its axial direction is parallel to the axial direction of the take-up roller 300, and they are usually horizontally positioned.

[0042] In this embodiment of the application, the chuck 120 has an axially arranged channel inside, so that the chuck 120 can be sleeved on the chuck base 110. The shape (outer shape) of the chuck 120 matches the shape of the insertion hole 310, that is, the side of the chuck 120 is at least in contact with a certain section of the insertion hole 310 on the take-up roller 300 along its axial direction.

[0043] Structurally, the chuck structure 100 adopts a split modular structure. The chuck 120 is primarily fixed via the chuck base 110, which connects the chuck 120 to the drive end of the drive device (e.g., a motor coupling), providing driving force to the chuck 120. The chuck 120 provides a direct contact surface for clamping the take-up roller 300 (typically a steel core), stabilizing the clamping of the take-up roller 300 and thus optimizing the product. Furthermore, in this embodiment, the shape of the chuck 120 matches the shape of the insertion hole 310, with the outer diameter of the chuck 120 gradually increasing from the top to the bottom, and the inner diameter of the insertion hole 310 gradually increasing from one end to the other. This variable-diameter, matching design makes it very easy to insert the chuck 120 into the insertion hole 310, and provides excellent fixation for the take-up roller 300.

[0044] In terms of materials, the chuck 120 in the chuck structure 100, which is used to directly contact and act with the take-up roller 300, is made of polytetrafluoroethylene, which has the following advantages: Low coefficient of friction: Its coefficient of friction is extremely low, which can effectively reduce the friction between the chuck 120 and the material being wound during the winding process, avoid damage to the material surface, improve the winding quality, and also reduce the energy consumption of the equipment.

[0045] Excellent chemical stability: PTFE plastic has excellent corrosion resistance and hardly reacts with any chemical substances. It can maintain stable performance in various harsh chemical environments, greatly extending the service life of the chuck 120.

[0046] High temperature resistance: It can be used for a long time in a temperature range of -200℃ to +260℃, and can adapt to winding work under various temperature conditions, thus having a wider range of applications.

[0047] Lightweight: Tetrafluoroethylene plastic has a low density and is lightweight, which can reduce the overall load on the traction winding equipment, making the equipment run more smoothly and improving the response speed and control accuracy of the equipment.

[0048] Therefore, by using the clamp structure 100 of this application embodiment to fix the end of the winding roller 300 for winding the material being wound, the winding quality and speed can be improved.

[0049] In some embodiments of this application, the insertion hole 310 on the end face of the take-up roller 300 is frustum-shaped, and the opening of the insertion hole 310 is larger than the bottom of the insertion hole 310; the chuck 120 is frustum-shaped, and the top surface of the chuck 120 is smaller than the bottom surface of the chuck 120.

[0050] In this embodiment, both the chuck 120 and the matching insertion hole 310 adopt a frustum design to facilitate their insertion. In other embodiments, the shape of the chuck 120 and the matching insertion hole 310 may also adopt other variable diameter designs. For example, the chuck 120 may also be frustum-shaped, such as a triangular frustum, a quadrangular frustum, a pentagonal frustum, etc., with the top surface being a small area at one end. The matching insertion hole 310 may be designed with the same shape, which can also achieve quick insertion and stable fixation of the chuck structure 100 to the take-up roller 300.

[0051] In some embodiments of this application, a chuck cover plate 130 is further included. The chuck cover plate 130 covers the top surface formed by the chuck 120 and the chuck base 110, and allows the chuck 120 and the chuck cover plate 130 to be fitted together into the insertion hole 310 of the take-up roller 300. The chuck cover plate 130 is fixed together with the chuck base 110. In this embodiment, the chuck cover plate 130 is also shaped like a frustum, and forms a continuous frustum with the chuck 120. The side surface of the frustum (the side surface of the chuck 120 + the side surface of the chuck cover plate 130) is at least in contact with a certain segment of the insertion hole 310 on the take-up roller 300 along its axial direction. In other embodiments, the chuck cover plate 130 may not be in contact with the insertion hole 310. That is, the chuck cover plate 130 only needs to cover and fix the chuck 120 and the chuck base 110 together without affecting the fitting of the chuck 120 with the insertion hole 310.

[0052] In this embodiment, the chuck 120 and the chuck base 110 are fixed together by the chuck cover plate 130, which improves the disassembly and assembly efficiency by 50% compared to the traditional welding or threaded connection method of iron chucks.

[0053] In some embodiments of this application, the chuck cover plate 130 and the chuck base 110 are fixed together by a plurality of fasteners 140, all of which are evenly distributed around the axial direction. In this embodiment, the fasteners 140 are fastening screws; in other embodiments, other types of fasteners 140 may also be used.

[0054] In this embodiment, the fastener 140 is used to limit and fix the chuck 120 to the chuck base 110. In addition, the concentricity of the chuck structure 100 as a whole can be adjusted by adjusting the counterweight of the fastener 140.

[0055] Please refer to the following: Figure 4 and Figure 5 In some embodiments of this application, the chuck base 110 includes a base 111 and a connecting portion 112 disposed on the base 111. The base 111 and the connecting portion 112 are coaxial, and the outer diameter of the connecting portion 112 is smaller than the outer diameter of the base 111. The overall shape is stepped. The inner ring shape of the chuck 120 matches the outer ring shape of the connecting portion 112, and the inner ring of the chuck 120 is sleeved on the connecting portion 112.

[0056] In some embodiments of this application, the inner ring surface of the chuck 120 is provided with a honeycomb-like microstructure. While reducing the roughness of the inner ring of the chuck 120, the air layer forms a buffer, further reducing the material contact pressure.

[0057] In some embodiments of this application, the base 111 and the connecting portion 112 are integrally formed; and / or, both the base 111 and the connecting portion 112 are cylindrical. In other embodiments, the base 111 and / or the connecting portion 112 may also be other shapes, such as the base 111 being a cube and the connecting portion 112 being a frustum shape, as long as the shape of the connecting portion 112 matches the shape of the channel inside the chuck 120, so that the chuck 120 can be sleeved on the chuck base 110.

[0058] In some embodiments of this application, the chuck base 110 has an insertion channel inside for inserting the drive end. The insertion channel is arranged axially. In one embodiment, the insertion channel is designed as a through hole and is divided into an oiling section 115 and an insertion section 114 from top to bottom. The inner diameter of the oiling section 115 is larger than the inner diameter of the insertion section 114, and the shape of the insertion section 114 matches the shape of the drive end. A cover plate can also be provided on the top surface of the base 111, for example, a removable end cap can be provided directly on the oiling section 115 to protect the drive end during equipment operation. In other embodiments, the insertion channel can also be designed as a blind hole, with the opening located on the bottom surface of the chuck base 110.

[0059] In some embodiments of this application, a positioning groove 320 is provided on the top surface formed by the chuck 120 and the chuck base 110, and the positioning groove 320 surrounds the top of the chuck base 110; the chuck cover plate 130 is sleeved on the top of the chuck base 110 and is fitted with the positioning groove 320. Viewed from the chuck base 110, the chuck base 110 includes an extension 113 disposed on the connecting portion 112. The extension 113 is coaxial with the connecting portion 112 and the base 111, and the outer diameter of the extension 113 is smaller than the outer diameter of the connecting portion 112, forming a stepped shape. The inner ring shape of the chuck cover plate 130 matches the outer ring shape of the extension 113, and the inner ring of the chuck cover plate 130 is sleeved on the extension 113.

[0060] In some embodiments of this application, the base 111, the connecting portion 112, and the extension portion 113 are integrally formed; and / or, the extension portion 113 is cylindrical. In other embodiments, the extension portion 113 may also be of other shapes, as long as the shape of the extension portion 113 matches the inner ring shape of the chuck cover plate 130, so that the chuck cover plate 130 can be sleeved on the extension portion 113.

[0061] In this embodiment, from the top surface formed by the chuck 120 and the chuck base 110, the positioning groove 320 is annular, the chuck cover plate 130 is also annular, and the chuck 120 is spliced ​​together with the chuck base 110 by a dovetail groove engagement method.

[0062] In some embodiments of this application, an annular elastic sealing lip is provided at the edge between the chuck 120 and the chuck cover plate 130. In this embodiment, the self-lubricating properties of PTFE are utilized to prevent the material edges from warping or sticking together, whereas iron chucks, lacking such a design, are prone to problems such as material edge curling and wrinkling.

[0063] In this embodiment, it is proposed to replace the iron clamp with a polytetrafluoroethylene (PTFE) plastic clamp. Through material innovation and structural optimization, not only is the fixing function achieved, but the problems of the iron clamp are also systematically solved. PTFE plastic, with its unique molecular structure, possesses three core advantages: an extremely low coefficient of friction (0.05~0.1), which reduces friction during the winding process by more than 70%, allowing for smooth winding without excessive tension and preventing material deformation; the coefficient of friction is approximately 1 / 5 to 1 / 6 that of the iron clamp, avoiding scratches on the film surface; extremely strong chemical stability, maintaining stable performance even in highly corrosive media such as aqua regia and concentrated alkalis; excellent chemical stability prevents rusting and extends service life by 3 to 5 times; and a density of only 2.1~2.3 g / cm³. 3 Compared to iron chucks, it reduces weight by 70%, significantly reduces equipment inertial load, and increases winding speed by more than 20%.

[0064] In addition, this application embodiment also provides a traction winding device, which includes a bracket, on which a winding roller 300 is disposed. The two ends of the winding roller 300 are respectively clamped and fixed by the clamp structure 100 of the aforementioned embodiment, and the clamp structure 100 and the winding roller 300 rotate coaxially.

[0065] In some embodiments of this application, a driving device is also included. The driving end of the driving device is coaxially connected to the chuck structure 100 and is used to drive the chuck structure 100 and the take-up roller 300 to rotate. Specifically, the driving end of the driving device is inserted into the hole of the chuck base 110.

[0066] In some embodiments of this application, a guide roller is also provided on the support, and the guide roller is arranged side by side with the winding roller 300.

[0067] In practical applications, comparing the chuck structure 100 of this application embodiment with the comparative chuck structure (wherein a chuck structure composed of an iron chuck and a chuck base welded together): The energy consumption of the comparative chuck structure 100 is 1.2~1.5kWh / kg, the winding speed is 190~260m / min, the service life is 1~3 years, the maintenance frequency is 1~2 times per year, and the replacement is difficult and laborious.

[0068] The chuck structure 100 of the embodiment has an energy consumption of 0.8~1.0kWh / kg, a winding speed of 260~330m / min, a service life of 5~8 years, is maintenance-free, and is easy and convenient to replace.

[0069] After a period of production practice, the product surface defect rate has been significantly reduced to less than 1%, and the product yield rate has been significantly improved, saving the company a lot of costs caused by defective products, while also enhancing the product's competitiveness in the market.

[0070] Through the above technical solutions, the embodiments of this application have significant technical advantages in core indicators such as product quality, production efficiency, and equipment lifespan, and have outstanding innovation and practicality.

[0071] Second Embodiment Please refer to Figures 6-9This embodiment provides a chuck structure 200, which differs from the first embodiment in that: a notch 211 is provided on the side of the chuck base 210 (specifically, base 111) for mounting a positioning pin assembly 220, which is used to position the take-up roller 300. In some embodiments of this application, the positioning pin assembly 220 includes a positioning pin block 221 and a positioning pin 222. The positioning pin 222 is inserted into the positioning pin block 221 at its bottom along the axial direction, and extends out at its top along the axial direction and is telescopically arranged relative to the positioning pin block 221. The shape of the notch 211 on the side of the chuck base 210 matches the shape of the positioning pin block 221. The positioning pin block 221 is embedded in the notch 211 and fixed together, and the positioning pin 222 is kept parallel to the axial direction of the chuck 120.

[0072] Please refer to the following: Figure 10 This embodiment also provides a traction winding device, wherein at least one end of the winding roller 300 is provided with a positioning pin assembly 220. Specifically, the positioning pin assembly 220 is fixed to the clamp structure 200 at the same end according to the above structure and can rotate synchronously. The top of the positioning pin 222 of the positioning pin assembly 220 abuts against the positioning groove 320 corresponding to the end face of the winding roller 300 to achieve positioning of the winding roller 300.

[0073] In summary, the chuck structure and traction winding device of this application embodiment have a good fixing effect on the winding roller and can improve the winding quality and speed.

[0074] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A clamp structure for fixing the end of a take-up roller, the end face of the take-up roller having an insertion hole, the inner diameter of the insertion hole gradually increasing from the end face to the other end, characterized in that, The clamp structure includes: Chuck base; The chuck is made of polytetrafluoroethylene and is sleeved on the top of the chuck base along its axial direction. The outer diameter of the chuck gradually increases from the top to the bottom and the chuck can be fitted into the insertion hole of the take-up roller.

2. The clamp structure according to claim 1, characterized in that, The insertion hole on the end face of the take-up roller is frustum-shaped, and the opening of the insertion hole is larger than the bottom of the insertion hole; the chuck is frustum-shaped, and the top surface of the chuck is smaller than the bottom surface of the chuck.

3. The clamp structure according to claim 1, characterized in that, It also includes a chuck cover plate, which covers the top surface formed by the chuck and the chuck base, and allows the chuck and the chuck cover plate to be fitted together into the insertion hole of the take-up roller.

4. The clamp structure according to claim 3, characterized in that, The chuck cover plate is fixed to the chuck base by a plurality of fasteners, all of which are evenly distributed around the axial direction. And / or, the top surface formed by the chuck and the chuck base is provided with a positioning groove, the positioning groove surrounding the top of the chuck base; the chuck cover plate is sleeved on the top of the chuck base and is fitted with the positioning groove.

5. The clamp structure according to claim 1, characterized in that, The chuck base includes a base and a connecting part disposed on the base. The base and the connecting part are coaxial, and the outer diameter of the connecting part is smaller than the outer diameter of the base. The inner ring shape of the chuck matches the outer ring shape of the connecting part, and the inner ring of the chuck is sleeved on the connecting part.

6. The chuck structure according to claim 5, characterized in that, The base and the connecting part are integrally formed; and / or, both the base and the connecting part are cylindrical; and / or, the side of the chuck base is provided with a notch for installing the positioning pin assembly.

7. The clamp structure according to claim 1, characterized in that, The chuck base has an insertion channel inside for inserting the drive end, and the insertion channel is arranged along its axial direction.

8. The chuck structure according to claim 7, characterized in that, The insertion channel is designed as a through hole and is divided into an oil injection section and an insertion section from top to bottom. The inner diameter of the oil injection section is larger than the inner diameter of the insertion section.

9. A traction winding device, characterized in that, It includes a support frame on which a take-up roller is mounted. Both ends of the take-up roller are clamped and fixed by a chuck structure as described in any one of claims 1 to 8, and the chuck structure rotates coaxially with the take-up roller.

10. The traction winding device according to claim 9, characterized in that, At least one end of the take-up roller is provided with a positioning pin assembly, which is fixed to the clamp structure at the same end and can rotate synchronously. The top of the positioning pin assembly abuts against the end face of the take-up roller to achieve positioning of the take-up roller.

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