Large tension stroke three-dimensional braiding machine with spool

Abstract

The utility model discloses a big tension stroke three -dimensional braider carries yarn spindle, in view of traditional yarn carrying spindle tension stroke short, small yarn storage space etc.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment technology, and in particular to a yarn-carrying spindle for a high-tension stroke three-dimensional weaving machine. Background Technology

[0002] In many key fields such as aerospace, automotive, energy, and biomedicine, the demand for complex structures and high-performance woven products is continuously increasing with technological advancements and industrial development. To meet this growing demand, three-dimensional rotary knitting machines are rapidly developing towards larger specifications and multi-layered designs. Larger specifications mean a significant increase in the span between the inner and outer layers of the three-dimensional rotary knitting machine chassis, directly leading to significant variations in the length of the yarn catenary. Traditional yarn-carrying spindles have limited yarn tension adjustment lengths, making it difficult to effectively adjust tension when faced with significant changes in the yarn catenary length, thus easily leading to yarn slack. Yarn slack severely affects the quality of woven products, causing key indicators such as mechanical properties and structural stability to fail to meet requirements, thus restricting the production of high-performance woven products in related fields.

[0003] Based on currently available patent information, optimizing the yarn tensioning function of yarn-carrying spindles still faces significant challenges. Most related designs have a short tensioning stroke, typically not exceeding 200mm. Such a limited stroke is simply insufficient to meet the yarn tension adjustment requirements of large-scale three-dimensional rotary knitting machines. Even if some designs address the yarn tensioning issue to some extent, structural flaws significantly reduce yarn storage space. This severely restricts yarn storage during production, resulting in shorter knitted pieces that cannot meet the demands for longer pieces in complex environments. Furthermore, this structural deficiency hinders large-scale production, increasing costs and reducing efficiency. In conclusion, the deficiencies in yarn tension adjustment and storage structure of existing yarn-carrying spindles have become a bottleneck restricting the development and application of three-dimensional knitting technology, urgently requiring a yarn-carrying spindle that can solve the high-tension stroke problem and possess a reasonable yarn storage structure. Utility Model Content

[0004] In view of this, it is necessary to optimize the yarn tensioning function of the yarn-carrying spindle and increase the storage capacity of the yarn carrier. To this end, this utility model designs a yarn-carrying spindle for a three-dimensional braiding machine with a large tension stroke, which relies on elastic elements and dynamic tensioners to achieve yarn tension adjustment.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A high-tension stroke three-dimensional knitting machine with a yarn-carrying spindle includes a base, a linkage slot, a shaft, a flip cover, a fixing member, a tension frame, a dynamic tensioner, a first elastic element, a second elastic element, a top push rod, and a connecting rod. The shaft is movably mounted on the base, the flip cover is mounted on the upper end of the shaft, the linkage slot is fitted onto the shaft, the fixing member is connected to the flip cover, the first elastic element is located inside the fixing member, the upper end of the connecting rod is inserted into the fixing member, the lower end of the connecting rod is connected to the base, the tension frame is fitted onto the connecting rod, one end of the top push rod is connected to the tension frame, and the other end is connected to the first elastic element, the second elastic element is mounted on the connecting rod, the dynamic tensioner is slidably mounted on the connecting rod and abuts against the second elastic element, the tension frame cooperates with the linkage slot, and the yarn bobbin is fitted onto the shaft.

[0007] The fixing component has a hollow cavity inside, with the top center connected to a flat-end set screw, containing a first elastic element and a top push rod. The two side hollow cavities are connected to one end of the connecting rod and contain a portion of a second elastic element. When the second elastic element is compressed, it can enter the two side hollow cavities, increasing the yarn tension stroke. The top push rod on the fixing component is located in the middle hollow cavity, with its upper end connected to the first elastic element. When the tension frame moves upward, it compresses the first elastic element, further giving the tension frame a downward rebound force. The fixing component has cylindrical through holes on both sides of its center for assembling the connecting rod. Inside, the second elastic element is mounted on the connecting rod; the dynamic tensioner can move up and down on the connecting rod; the upper end of the dynamic tensioner is connected to the bottom of the second elastic element. When the dynamic tensioner moves upward, the second elastic element provides a downward force to the dynamic tensioner, thereby providing yarn tension; the base cooperates with the lower end of the tension frame. When the dynamic tensioner moves upward, it lifts the tension frame, and the tension frame moves upward to disengage from the linkage slot. The linkage slot rotates with the yarn bobbin. After the yarn moves outward, the tension frame moves downward, and the tension frame and linkage slot re-engage.

[0008] In a structure that optimizes the aforementioned solution, rectangular locking teeth are provided on the linkage slot and the tension frame, and the linkage slot engages with the rectangular locking teeth on the tension frame. The lower end of the tension frame has locking teeth that engage with the linkage slot. When the tension frame moves upward, the locking teeth move upward and disengage from the locking teeth on the linkage slot. The linkage slot rotates with the yarn bobbin, and after the yarn moves outward, the tension frame moves downward, and the locking teeth re-engage.

[0009] In a structure that optimizes the aforementioned solution, the connecting rod includes connecting rod A and connecting rod B, which are arranged parallel to each other. The upper end of connecting rod A is inserted into a fixing member, and the lower end is connected to the base. Connecting rod A and connecting rod B are used for overall structural fixation; their uppermost ends are connected to the fixing member, their middle ends pass through a tension frame, and their lowermost ends rest on the base.

[0010] In a structure that optimizes the aforementioned solution, a flat-end set screw is also included. The flat-end set screw fixes the first elastic element inside the fixing element and is connected to the fixing element, serving as a force-bearing point at one end of the first elastic element.

[0011] In a structure that optimizes the aforementioned solution, a yarn guide opening is also included. The yarn guide opening is located on the upper part of the fixing member, and the yarn guide opening leads the yarn out and into the structural member for weaving.

[0012] In a structure that optimizes the aforementioned solution, a yarn guide opening is also included, which is located at the lower part of the fixing member, and the yarn guide opening draws the yarn out from the yarn bobbin.

[0013] In a structure that optimizes the aforementioned solution, an anti-slip-thread pulley is also included. The anti-slip-thread pulley is installed on the dynamic tensioner and has a bearing inside. This allows the yarn to pass through smoothly while effectively preventing the yarn from loosening and coming off during movement due to tension changes. This ensures the stability of the yarn during tension adjustment and weaving, and avoids weaving failures and product quality problems caused by yarn coming off.

[0014] In a structure that optimizes the aforementioned solution, a pressure plate is further included, and the lower ends of connecting rod A and connecting rod B are fixed to the base by the pressure plate. The pressure plate presses the ends of connecting rod A and connecting rod B tightly against the base.

[0015] In a structure that optimizes the aforementioned solution, the first and second elastic elements are compression springs. Compression springs possess excellent elastic properties, enabling them to stably provide corresponding elastic force when compressed and released by external forces, meeting the elastic force requirements during yarn tension adjustment. Furthermore, compression springs have a simple structure, low cost, and are easy to install and maintain, effectively achieving automatic yarn tension adjustment and improving the working performance and practicality of the yarn-carrying spindle.

[0016] Compared to existing technologies, the yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine described in this utility model achieves yarn tension adjustment through elastic elements and dynamic tensioners, with the following specific advantages:

[0017] The yarn-carrying spindle of this utility model, with its large tension stroke, employs compression springs as both the first and second elastic elements. Utilizing their excellent elastic properties, these springs stably output elastic force during compression and release. Combined with the unique hollow cavity design of the fixing component, the second elastic element can be embedded into the hollow cavities on both sides during compression. This overcomes the limitation of traditional yarn-carrying spindles with a tension stroke of less than 200mm, perfectly adapting to the working conditions of large-scale three-dimensional rotary braiding machines where the length of the yarn catenary changes significantly. Simultaneously, the dynamic tensioner works closely with the second elastic element to achieve real-time, automatic adjustment of the yarn tension, with the linkage groove and tension... The rectangular toothed structure of the frame ensures flexible yarn movement and precise tension adjustment, effectively preventing yarn slack and improving the quality of woven products. In addition, the clever layout of each component structure and the rational planning of yarn storage space solve the problem that existing technologies sacrifice yarn storage space when optimizing tensioning function, meeting the production needs of long-size woven parts and promoting large-scale production applications. Furthermore, the parallel connecting rods A and B, together with the pressure plate, are fixed to the base, and the anti-skid pulley on the dynamic tensioner and the flat-end set screw precisely fix the first elastic element, comprehensively improving the stability and working performance of the overall structure of the yarn-carrying spindle. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine described in this utility model.

[0020] Figure 2 This is a diagram showing the yarn path of the yarn-carrying spindle in the high-tension stroke three-dimensional braiding machine described in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Base, 2. Linkage slot, 3. Shaft, 4. Flip cover, 5. Fixing component, 6. Tension frame, 7. Dynamic tensioner, 8. First elastic element, 9. Second elastic element, 10. Top push rod, 111. Connecting rod A, 112. Connecting rod B, 12. Flat end set screw, 13. Yarn inlet, 14. Yarn guide, 15. Anti-skid pulley, 16. Pressure plate, 17. Yarn cylinder. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-2 As shown, this embodiment of a high-tension stroke three-dimensional braiding machine yarn-carrying spindle includes a base 1, a linkage slot 2, a shaft 3, a flip cover 4, a fixing member 5, a tension frame 6, a dynamic tensioner 7, a first elastic element 8, a second elastic element 9, a top push rod 10, and a connecting rod. The shaft 3 is vertically and movably disposed at the center of the base 1, and its upper end is connected to the flip cover 4 by a thread. The linkage slot 2 is sleeved in the middle of the shaft 3 by a bearing and can rotate freely around the shaft. The fixing member 5 is a hollow column, and its lower end is fixedly connected to the flip cover 4 by bolts. The internal hollow cavity is divided into a central main cavity and two side secondary cavities: the top of the central main cavity is fixed with a flat-end set screw 12 to the compression spring of the first elastic element 8, and its lower end is connected to the top push rod 10; the two side secondary cavities are respectively provided with cylindrical through holes for assembling the connecting rod.

[0028] The connecting rod includes parallel connecting rods A111 and B112. Their upper ends are inserted into the secondary cavities on both sides of the fixing member 5 and fixed with an interference fit. Their lower ends are bolted to the base 1 via a pressure plate 16, forming a support frame that runs through the tension frame 6. The tension frame 6 has a rectangular frame structure with a through hole in the middle that matches the connecting rod. It is fitted onto the middle of connecting rods A111 and B112 and can slide up and down. Its lower outer edge has rectangular teeth that correspond to and engage with the rectangular teeth at the upper end of the linkage groove 2.

[0029] The dynamic tensioner 7 is a slider with a through hole in the middle that matches the connecting rod. It is slidably sleeved on connecting rods A111 and B112. Its top abuts against the lower end of the compression spring of the second elastic element 9. The upper end of the second elastic element 9 is embedded in the secondary cavities on both sides of the fixing element 5 and abuts against the cavity walls. When the dynamic tensioner 7 slides upward, the second elastic element 9 is compressed and stores elastic force. The dynamic tensioner 7 is equipped with an anti-slip-thread pulley 15, which has a built-in bearing to guide the yarn through and prevent it from slipping out.

[0030] The yarn bobbin 17 is fitted at the lower part of the shaft 3. After the yarn is drawn out from the yarn bobbin, it enters through the yarn guide port 14 at the lower part of the fixing member 5, passes around the anti-skid pulley 15 of the dynamic tension device 7, and is then led out to the weaving area through the yarn guide port 13 at the upper part of the fixing member 5.

[0031] In the specific implementation of this scheme, when the yarn tension decreases due to the braiding speed of the braiding machine, the dynamic tensioner 7 slides upward with the yarn under the effect of yarn relaxation, compressing the second elastic element 9 and pushing the tension frame 6 upward, causing the locking teeth at the lower end of the tension frame 6 to disengage from the locking teeth of the linkage slot 2. The linkage slot 2 then rotates freely with the yarn bobbin 17 to release the yarn. When the yarn tension increases, the second elastic element 9 resets and pushes the dynamic tensioner 7 downward, causing the tension frame 6 to descend synchronously. The locking teeth re-engage with the linkage slot 2, restricting the rotation of the yarn bobbin and achieving tension stability. The first elastic element 8 provides downward rebound force to the tension frame 6 through the top push rod 10, which, together with the second elastic element 9, expands the tension adjustment stroke. At the same time, the secondary cavities on both sides of the fixing element 5 provide space for the compression of the second elastic element 9, allowing the tension stroke to break through the traditional 200mm limit. The parallel connecting rod and pressure plate 16 ensure structural stability, and the anti-skid pulley 15 prevents the yarn from coming out. The overall structure achieves large tension stroke adjustment while retaining sufficient yarn storage space in the yarn bobbin through reasonable layout, meeting the production needs of long-size braided parts.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A yarn-carrying spindle for a high-tension stroke three-dimensional braiding machine, characterized in that: The device includes a base (1), a linkage slot (2), a shaft (3), a flip cover (4), a fixing part (5), a tension frame (6), a dynamic tensioner (7), a first elastic element (8), a second elastic element (9), a top push rod (10), and a connecting rod. The shaft (3) is movably mounted on the base (1), the flip cover (4) is mounted on the upper end of the shaft (3), the linkage slot (2) is fitted on the shaft (3), the fixing part (5) is connected to the flip cover (4), the first elastic element (8) is mounted inside the fixing part (5), the upper end of the connecting rod is inserted into the fixing part (5), the lower end of the connecting rod is connected to the base (1), the tension frame (6) is fitted on the connecting rod, one end of the top push rod (10) is connected to the tension frame (6), and the other end is connected to the first elastic element (8). The second elastic element (9) is mounted on the connecting rod, the dynamic tensioner (7) is slidably mounted on the connecting rod and abuts against the second elastic element (9), and the tension frame (6) cooperates with the linkage slot (2).

2. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: The linkage slot (2) and tension frame (6) are provided with rectangular teeth, and the linkage slot (2) cooperates with the rectangular teeth on the tension frame (6).

3. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: The connecting rod includes connecting rod A (111) and connecting rod B (112). Connecting rod A (111) and connecting rod B (112) are arranged in parallel, with the upper end inserted into the fixing member (5) and the lower end connected to the base (1).

4. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: It also includes a flat-end set screw (12) that fixes the first elastic element (8) inside the fixing element (5).

5. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: It also includes a yarn feeder (13), which is located on the upper part of the fixing member (5).

6. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: It also includes a yarn guide (14), which is located at the lower part of the fixing member (5).

7. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: It also includes an anti-skid pulley (15), which is installed on the dynamic tensioner (7).

8. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 3, characterized in that: It also includes a pressure plate (16), and the lower ends of the connecting rod A (111) and connecting rod B (112) are fixed to the base (1) by the pressure plate (16).

9. The yarn-carrying spindle of the high-tension stroke three-dimensional braiding machine according to claim 1, characterized in that: The first elastic element (8) and the second elastic element (9) are compression springs.

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