Impeller structure for high-speed braiding machine

Abstract

The utility model discloses an impeller structure for a high-speed braiding machine, which comprises a workbench, the workbench comprises a cover plate and a base plate, the base plate is fixedly provided with a rotating shaft assembly extending upwards from the cover plate, and a first buffer assembly and a second buffer assembly are arranged between the inner wall of a shaft sleeve piece and the outer wall of a central shaft body. The first buffering assembly and the second buffering assembly are arranged in a layered mode, differential buffering is conducted on axial impact and radial impact, and therefore the fracture risk of the center shaft body caused by combined load concentration is obviously reduced, and when the impeller blades and the shaft sleeve piece are impacted to generate circumferential deviation, the elastic belt body is stretched along a spiral groove path, and the service life of the impeller blades and the shaft sleeve piece is prolonged. According to the spiral direction, the deviation amplitude is limited through geometric constraint, the energy release time is prolonged through increase of the deformation length of the elastic belt body, instant impact is converted into progressive buffering, meanwhile, the self-resetting characteristic of the spiral structure can assist the shaft sleeve piece in fast returning after impact disappears, and vibration residues are reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-speed braiding machine technology, specifically to an impeller structure for a high-speed braiding machine. Background Technology

[0002] High-speed braiding machines are suitable for weaving various round or flat non-elastic and elastic ropes and belts. They are mainly used to weave various ropes and belts, shoelaces, elastic bands, decorative bands, high-tensile bands, fishing net lines, fishing lines, trailer ropes, marine ropes, sports belts, curtain tapes, wires, fibers and other high-quality products.

[0003] During impeller operation, the impeller needs to drive multiple spinning wheels to rotate at high speed. During the high-speed rotation and exchange of spinning wheels between two adjacent impellers, the impeller and the spinning wheels will collide to some extent, causing the impeller to vibrate and further affecting its operation. In the long-term high-speed collision process, it is also easy to cause damage to the contact position between the spinning wheels and the impeller. As described in the published patent "Weaving Belt Machine with Spinning Wheels" with publication number CN2832856Y, when the weaving belt machine is operating, the transmission group drives the multiple impellers to rotate, which in turn drives the spinning wheels to rotate around the impellers and repeat continuously to complete the weaving operation. The spinning wheels will rub against the impeller, causing damage to either the spinning wheels or the impeller.

[0004] In summary, during the operation of existing high-speed knitting machines, when two adjacent impellers rotate at high speed to exchange spindles, there will be collisions between the spindles and the impellers. At the same time, during the high-speed rotation of the impellers, the impeller shaft will be subjected to a large force, resulting in excessive instantaneous combined load on the impeller shaft, which can easily lead to damage. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution for an impeller structure used in high-speed braiding machines that can solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An impeller structure for a high-speed braiding machine includes a worktable, the worktable including a cover plate and a base plate, and a rotating shaft assembly extending upward from the cover plate is fixed on the base plate.

[0008] The rotating shaft assembly includes a central shaft rotatably mounted on a substrate, and a first boss and a second boss are sequentially formed on the outer wall of the central shaft from bottom to top.

[0009] A transmission gear is fixedly mounted on the outer wall of the first boss;

[0010] A sleeve is fixedly installed on the upper end face of the second boss, and an annular mounting groove is opened on the upper end face of the sleeve.

[0011] A shaft assembly is rotatably fitted onto the annular mounting groove. An elastic buffer position is pre-set between the outer wall of the annular mounting groove and the inner wall of the shaft assembly. An impeller is fixed on the outer wall of the shaft assembly. A first buffer component and a second buffer component are installed between the inner wall of the shaft assembly and the outer wall of the central shaft.

[0012] The outer wall of the sleeve has a spiral groove extending from the lower end to the upper end. An elastic band is installed in the spiral groove. The upper end of the elastic band is fixedly connected to the lower end face of the shaft assembly, and the lower end of the elastic band is fixedly mounted on the outer wall of the sleeve.

[0013] As a further embodiment of this utility model: a plurality of annular limiting grooves are sequentially opened on the outer wall of the central shaft from top to bottom. The first buffer assembly includes a spring buffer installed in the annular limiting groove. One end of the spring buffer abuts against the inner bottom surface of the annular limiting groove, and the other end of the spring buffer abuts against the inner wall of the shaft assembly.

[0014] As a further embodiment of this utility model: a first abutting block is formed at the lower end of the inner wall of the shaft assembly, and the second buffer assembly includes a first abutting ring fixedly sleeved on the outer wall of the central shaft, and a second abutting ring opposite to the first abutting block is fixedly sleeved on the outer wall of the first abutting ring.

[0015] As a further embodiment of this utility model: the inner ring of the shaft assembly is equipped with a sealing ring sleeved on the central shaft body to isolate the first buffer component. The outer side of the sealing ring is in tight contact with the shaft assembly, and the inner side of the sealing ring is in tight contact with the central shaft body.

[0016] As a further embodiment of this utility model: the first abutting ring includes a nylon composite ring, and the second abutting ring includes a highly wear-resistant polyurethane ring.

[0017] As a further embodiment of this utility model: the elastic band includes a highly resilient thermoplastic polyurethane band or a hydrogenated nitrile rubber band.

[0018] As a further embodiment of this utility model: the upper end face of the second boss is uniformly formed with multiple positioning posts along the circumference, and the lower end face of the sleeve is uniformly formed with multiple positioning holes that are respectively inserted and matched with the positioning posts along the circumference.

[0019] As a further embodiment of this utility model: a bearing component is fixedly provided at the lower end of the outer wall of the central shaft, the outer wall of the bearing component is fixedly provided on the base plate, and the inner wall of the bearing component is fixedly connected to the central shaft.

[0020] As a further embodiment of this utility model: a first bolt mounting hole is provided at the upper end of the central shaft, and a plurality of second bolt mounting holes are provided at equal intervals around the periphery of the first bolt mounting hole.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] First, through the elastic buffer position reserved in the annular mounting groove between the sleeve and the shaft assembly in the rotating shaft assembly, when the impeller rotates at high speed, the instantaneous collision impact force on the shaft assembly and the impeller blade can be accommodated by the buffer position, avoiding the rigid contact being directly transmitted to the central shaft.

[0023] The first and second buffer components are arranged in layers to provide differentiated buffering for axial and radial impacts, thereby significantly reducing the risk of fracture of the central shaft due to concentrated composite loads.

[0024] When the impeller blades and shaft assembly are subjected to impact and circumferential displacement occurs, the elastic band is stretched along the spiral groove path. Its spiral direction not only limits the displacement amplitude through geometric constraints, but also extends the energy release time by increasing the deformation length of the elastic band, transforming the instantaneous impact into a gradual buffer. At the same time, the self-resetting characteristic of the spiral structure can assist the shaft assembly to quickly return to its position after the impact disappears, reducing residual vibration. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural view of the present invention;

[0026] Figure 2 This is a three-dimensional view of the structure of the rotating shaft assembly 103 in this utility model, showing their mutual operation and cooperation.

[0027] Figure 3 This is a schematic diagram of the structure of the rotating shaft assembly 103 and the working mechanism of the spinning wheel in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the rotating shaft assembly 103 in this utility model, showing the transmission connection between each other;

[0029] Figure 5 This is a three-dimensional structural view of the rotating shaft assembly 103 of this utility model;

[0030] Figure 6 This is a front view of the rotating shaft assembly 103 of this utility model;

[0031] Figure 7 yes Figure 6 A cross-sectional view along the AA direction;

[0032] Figure 8 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0033] The reference numerals and names in the figure are as follows:

[0034] Workbench-100, Cover plate-101, Base plate-102, Rotating shaft assembly-103, Central shaft-104, First boss-105, Second boss-106, Transmission gear-107, Sleeve-108, Annular mounting groove-109, Shaft assembly-110, Elastic buffer position-111, Impeller-112, First buffer assembly-113, Second buffer assembly-114, Spiral groove-115, Elastic belt-116, Annular limiting groove-117, Spring buffer-118, First abutting block-119, First abutting ring-120, Second abutting ring-121, Sealing ring-122, Positioning post-127, Positioning hole-128, Bearing-129, First bolt mounting hole-130, Second bolt mounting hole-131. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figure 1-8 An impeller structure for a high-speed braiding machine includes a worktable 100, the worktable 100 including a cover plate 101 and a base plate 102, and a rotating shaft assembly 103 extending upward from the cover plate 101 is fixed on the base plate 102.

[0037] The rotating shaft assembly 103 includes a central shaft 104 rotatably disposed on the substrate 102, and a first boss 105 and a second boss 106 are sequentially formed on the outer wall of the central shaft 104 from bottom to top.

[0038] A transmission gear 107 is fixedly provided on the outer wall of the first boss 105;

[0039] The upper end face of the second boss 106 is fixedly equipped with a sleeve 108, and the upper end face of the sleeve 108 is provided with an annular mounting groove 109.

[0040] A shaft assembly 110 is rotatably fitted onto the annular mounting groove 109. An elastic buffer position 111 is preset between the outer wall of the annular mounting groove 109 and the inner wall of the shaft assembly 110. An impeller blade 112 is fixed on the outer wall of the shaft assembly 110. A first buffer assembly 113 and a second buffer assembly 114 are installed between the inner wall of the shaft assembly 110 and the outer wall of the central shaft 104.

[0041] A spiral groove 115 extending from the lower end to the upper end is provided on the outer wall of the sleeve 108. An elastic band 116 is installed in the spiral groove 115. The upper end of the elastic band 116 is fixedly connected to the lower end face of the shaft assembly 110, and the lower end of the elastic band 116 is fixed on the outer wall of the sleeve 108.

[0042] like Figure 1 , Figure 3 and Figure 7 As shown, firstly, through the elastic buffer position 111 reserved in the annular mounting groove 109 between the sleeve 108 and the shaft assembly 110 in the rotating shaft assembly 103, when the impeller rotates at high speed, the instantaneous collision impact force received by the shaft assembly 110 and the impeller blade 112 can be accommodated by the buffer position, avoiding rigid contact directly transmitted to the central shaft 104.

[0043] Secondly, the first buffer assembly 113 and the second buffer assembly 114 are arranged in layers (such as springs, damping rubber or composite elastic materials) to provide differentiated buffering for axial and radial impacts respectively. The first buffer assembly 113 can suppress the radial x and axial y vibrations (mainly radial) of the impeller blade 112 after being impacted, while the second buffer assembly 114 further weakens the shear stress on the connection part of the central shaft 104 by radial compression deformation, thereby significantly reducing the risk of fracture of the central shaft 104 due to the concentration of composite loads.

[0044] Furthermore, the spiral groove 115 on the outer wall of the sleeve 108 and the elastic band 116 form a dynamic linkage mechanism, such as... Figure 3 As shown, during the process of the rotating spindle transferring power from one impeller to the next, since the rotating spindle enters the next impeller tangentially, it will generate a circumferential force f1 on the next impeller. As a result, the rotating shaft assembly 103 will be subjected to not only radial and axial forces, but also a circumferential instantaneous impact force z. During long-term use, this can easily lead to metal fatigue. Under normal conditions, the shaft assembly 110 and the impeller blade 112 are rotated by the elastic belt 116. When the impeller blade 112 is impacted by the rotating spindle, the impeller blade 112 and the shaft assembly 110 are circumferentially offset by the impact. The elastic belt 116 is stretched along the path of the spiral groove 115. Its spiral direction not only limits the offset amplitude through geometric constraints, but also extends the energy release time by increasing the deformation length of the elastic belt 116, transforming the instantaneous impact into a gradual buffer. At the same time, the self-resetting characteristic of the spiral structure can assist the shaft assembly 110 to quickly return to its position after the impact disappears, reducing residual vibration.

[0045] In one embodiment, the helical direction of the helical groove 115 includes a forward helix and a reverse helix, depending on actual needs.

[0046] Furthermore, the split design of the transmission gear component 107 and the rotating shaft assembly 103 (the first boss 105 fixes the transmission gear, and the second boss 106 connects the buffer structure) achieves functional decoupling of power transmission and impact protection. This not only ensures the accuracy and efficiency of gear meshing transmission, but also isolates the interference of periodic loads on the transmission system during high-speed rotation through the flexible connection between the sleeve component 108 and the shaft assembly 110, thereby ensuring that the weaving machine maintains stability and reliability during long-term high-load operation.

[0047] In this embodiment of the present invention, a plurality of annular limiting grooves 117 are sequentially opened on the outer wall of the central shaft 104 from top to bottom. The first buffer assembly 113 includes a spring buffer member 118 installed in the annular limiting groove 117. One end of the spring buffer member 118 abuts against the inner bottom surface of the annular limiting groove 117, and the other end of the spring buffer member 118 abuts against the inner wall of the shaft assembly 110.

[0048] like Figure 7 As shown, an axially graded elastic buffer system is constructed by multiple annular limiting grooves 117 and corresponding spring buffers 118 arranged from top to bottom on the outer wall of the central shaft 104. When the shaft assembly 110 is impacted, the instantaneous impact force can be decomposed into multiple axial and radial components and evenly distributed to different height areas of the central shaft 104 through the synchronous compression deformation of the spring buffers 118 in each annular limiting groove 117, which significantly reduces the risk of local stress concentration.

[0049] The design of the spring buffer 118 having its two ends abutting against the inner bottom surface of the annular limiting groove 117 and the inner wall of the shaft assembly 110 respectively not only constrains the axial and radial displacement of the shaft assembly 110 through multi-point elastic support, but also utilizes the elastic recovery characteristics of the spring to push the shaft assembly 110 to quickly reset after the impact disappears, reducing residual vibration.

[0050] In addition, the stepped distribution of the annular limiting groove 117 optimizes the matching relationship between the structural strength of the central shaft 104 and the buffer space. While ensuring axial stiffness, modular maintenance is achieved through the split installation of the spring buffer 118, reducing the overall performance degradation caused by the failure of a single buffer element.

[0051] This structure further works in conjunction with the elastic belt 116 in the spiral groove 115 of the sleeve 108 to form an axial, radial and circumferential composite buffer network. During high-speed rotation, it effectively suppresses the multi-directional vibration of the impeller blade 112 caused by the collision of the spinning wheel, ensuring the long-term stability of the impeller's dynamic balance and transmission accuracy, and ultimately extending the service life of the central shaft 104 and the impeller blade 112 assembly.

[0052] In this embodiment of the utility model, a first abutting block 119 is formed on the lower end of the inner wall of the shaft assembly 110, and the second buffer assembly 114 includes a first abutting ring 120 fixedly sleeved on the outer wall of the central shaft 104, and a second abutting ring 121 opposite to the first abutting block 119 is fixedly sleeved on the outer wall of the first abutting ring 120.

[0053] like Figure 7 As shown, the nested engagement structure of the first abutment block 119 at the lower end of the inner wall of the shaft assembly 110 with the first abutment ring 120 and the second abutment ring 121 on the central shaft body 104 forms a multi-level buffer interface for radial impact force. When the shaft assembly 110 is subjected to excessive radial displacement due to lateral impact, the contact surface of the first abutment block 119 and the second abutment ring 121 absorbs the initial impact energy through elastic deformation. At the same time, the rigid connection between the first abutment ring 120 and the central shaft body 104 constrains the displacement amplitude, preventing the shaft assembly 110 from directly colliding with the central shaft body 104.

[0054] The relative motion path between the second abutting ring 121 and the first abutting block 119 further transforms the remaining impact force into shear stress distributed along the axial direction of the central shaft 104. This stress is then evenly distributed to the outer wall of the central shaft 104 through the annular support structure of the first abutting ring 120, significantly reducing the local stress peak. The impact energy is consumed through the frictional damping effect of the abutting surface, thereby reducing the wear at the connection between the central shaft 104 and the shaft assembly 110, extending the service life of the overall structure, and ultimately achieving stable operation of the impeller under high-speed ingot changing conditions.

[0055] In this embodiment of the present invention, the inner ring of the shaft assembly 110 is provided with a sealing ring 122 sleeved on the central shaft 104 for isolating the first buffer assembly 113. The outer side of the sealing ring 122 is in tight contact with the shaft assembly 110, and the inner side of the sealing ring 122 is in tight contact with the central shaft 104.

[0056] like Figure 7 As shown, by setting a sealing ring 122 on the inner ring of the shaft assembly 110 and fitting it to the central shaft 104, and making its outer side form a bidirectional sealed contact with the shaft assembly 110 and its inner side form a bidirectional sealed contact with the central shaft 104, a physical isolation barrier is constructed for the first buffer assembly 113. This not only prevents external dust and oil from entering the buffer area and causing component wear or damping characteristic attenuation, but also prevents internal lubricating medium leakage, maintaining the cleanliness and lubrication stability of the working environment of the buffer assembly.

[0057] In this embodiment of the present invention, the first abutting ring 120 includes a nylon composite ring, and the second abutting ring 121 includes a highly wear-resistant polyurethane ring.

[0058] Polyurethane elastomers combine high elastic modulus with fatigue resistance, enabling them to efficiently absorb the instantaneous impact energy when the first abutting block 119 and the second abutting ring 121 come into contact through their own compression deformation. At the same time, the high wear resistance of the material reduces wear on the abutting surface caused by high-frequency friction.

[0059] By adding glass fiber or carbon fiber reinforcement, the nylon composite material can improve shear strength while maintaining lightweight, ensuring the rigid connection stability between the first abutment ring 120 and the central shaft 104. The self-lubricating properties of the composite material reduce the coefficient of friction and reduce vibration energy loss. The synergistic optimization of materials and structure suppresses the plastic deformation and thermal aging risk of the abutment ring, thereby extending the service life of the buffer assembly and maintaining the impeller rotation accuracy and transmission stability.

[0060] In this embodiment of the present invention, the elastic band 116 includes a highly resilient thermoplastic polyurethane band or a hydrogenated nitrile rubber band.

[0061] In this embodiment of the invention, the elastic belt 116 can be made of high-resilience thermoplastic polyurethane (TPU) or hydrogenated nitrile butadiene rubber (HNBR). TPU, with its excellent tensile strength and tear resistance, can maintain a stable deformation recovery rate during repeated stretching-rebound cycles within the spiral groove 115, ensuring the elastic belt 116 quickly recovers after absorbing impact energy. Simultaneously, its wear-resistant properties resist frictional losses caused by the relative movement of the sleeve 108 and the shaft assembly 110. HNBR, through hydrogenation modification, combines oil resistance, high-temperature resistance, and aging resistance, making it suitable for environments where lubricating grease or temperature rise may occur inside the braiding machine. Its high damping characteristics further convert impact kinetic energy into heat dissipation, suppressing vibration transmission. Both materials can adapt to the dynamic load requirements of the elastic belt 116 under high-speed rotation and frequent impacts. Through the synergistic effect of the material's high elasticity and the spiral path of the structure, the energy release time is extended and the instantaneous stress peak is reduced, thereby improving buffering efficiency and structural durability, ensuring the long-term stable operation of the impeller.

[0062] In this embodiment of the utility model, the upper end face of the second boss 106 is uniformly formed with a plurality of positioning posts 127 along the circumferential direction, and the lower end face of the sleeve 108 is uniformly formed with a plurality of positioning holes 128 that are respectively inserted and matched with the positioning posts 127 along the circumferential direction.

[0063] like Figure 7 As shown, by inserting and engaging multiple positioning pins 127 evenly distributed circumferentially on the upper end face of the second boss 106 with the corresponding positioning holes 128 on the lower end face of the sleeve 108, the sleeve 108 and the rotating shaft assembly 103 are positioned quickly and accurately, ensuring the concentricity and circumferential angle consistency of the two during assembly, and avoiding the problem of uneven force on the buffer assembly caused by installation deviation.

[0064] The multi-point rigid connection structure of the positioning post 127 and the positioning hole 128 further enhances the anti-torsion capability between the sleeve 108 and the second boss 106. When the impeller rotates at high speed, it effectively suppresses the circumferential fretting displacement of the sleeve 108 caused by periodic impact loads. In addition, the circumferentially evenly distributed positioning post 127 distributes the radial impact force on the sleeve 108 to different areas of the second boss 106 through the distributed load transmission path, reducing the fatigue damage of the central shaft 104 caused by local stress concentration. At the same time, it complements the spiral guiding mechanism of the elastic belt 116, improves the synergistic efficiency of the dynamic buffer of the shaft assembly 110, and ultimately ensures the long-term operational stability and assembly maintainability of the overall impeller structure.

[0065] In this embodiment of the present invention, a bearing component 129 is fixedly provided at the lower end of the outer wall of the central shaft 104, the outer wall of the bearing component 129 is fixedly provided on the base plate 102, and the inner wall of the bearing component 129 is fixedly connected to the central shaft 104.

[0066] like Figure 7 As shown, by fixing a bearing 129 to the lower end of the outer wall of the central shaft 104 and rigidly connecting its outer wall to the base plate 102 and its inner wall to the central shaft 104, a dual support system of the rotating shaft assembly 103 is constructed. The bearing 129, as the main bearing node, directly transmits the radial load of the central shaft 104 to the base plate 102, which significantly reduces the bending stress at the root of the central shaft 104.

[0067] The rigid fixing design of the bearing component 129 effectively suppresses the radial vibration and axial movement of the central shaft 104 when the impeller rotates at high speed, and avoids the decrease in meshing accuracy or abnormal wear of the transmission gear component 107 due to shaft misalignment. In addition, the solid connection between the outer wall of the bearing component 129 and the base plate 102 further enhances the overall impact resistance of the shaft assembly 103, forming a rigid-flexible synergistic mechanism with the upper buffer structure, which extends the service life of the central shaft 104 and the transmission system while ensuring power transmission efficiency.

[0068] In one embodiment, in order to further improve the installation stability of the central shaft 104, a second bearing 129 is fixed on the outer wall of the sleeve 108. The outer wall of the second bearing 129 is fixed in the mounting hole opened on the cover plate 101. The inner wall of the second bearing 129 is fixedly connected to the sleeve 108. The spiral groove 115 passes through the inner ring of the second bearing 129. The elastic band 116 does not interfere with the second bearing 129 in the spiral groove 115.

[0069] In this embodiment of the utility model, a first bolt mounting hole 130 is provided at the upper end of the central shaft 104, and a plurality of second bolt mounting holes 131 are provided at equal intervals around the periphery of the first bolt mounting hole 130.

[0070] As shown in 7, by setting a multi-level fastening structure consisting of a first bolt mounting hole 130 and a plurality of second bolt mounting holes 131 evenly distributed around the periphery at the upper end of the central shaft 104, a composite rigid fixation between the impeller blade 112 or external connector and the central shaft 104 is achieved.

[0071] The first bolt mounting hole 130 serves as the main positioning reference. A large-diameter bolt provides axial preload to ensure initial positioning accuracy. The circumferentially distributed second bolt mounting holes 131 are locked together with small-diameter bolts to form a multi-directional constraint network. This effectively decomposes the radial shear force and centrifugal load transmitted by the impeller blade 112 during high-speed rotation, and avoids thread stripping or hole wall deformation caused by stress concentration at a single bolt connection point.

[0072] Meanwhile, the equidistantly distributed bolt holes, through the circumferentially symmetrical load transfer path, significantly reduce the peak bending moment in the upper flange area of ​​the central shaft 104, suppressing the risk of microcrack propagation caused by non-uniform stress.

[0073] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An impeller structure for a high-speed braiding machine, characterized in that, The system includes a worktable (100), which includes a cover plate (101) and a base plate (102), and a rotating shaft assembly (103) extending upward from the cover plate (101) is fixed on the base plate (102). The rotating shaft assembly (103) includes a central shaft (104) rotatably mounted on a substrate (102), and a first boss (105) and a second boss (106) are formed sequentially from bottom to top on the outer wall of the central shaft (104). A transmission gear (107) is fixed on the outer wall of the first boss (105). The upper end face of the second boss (106) is fixedly equipped with a sleeve (108), and the upper end face of the sleeve (108) is provided with an annular mounting groove (109). A shaft assembly (110) is rotatably sleeved on the annular mounting groove (109). An elastic buffer position (111) is preset between the outer wall of the annular mounting groove (109) and the inner wall of the shaft assembly (110). An impeller blade (112) is fixed on the outer wall of the shaft assembly (110). A first buffer assembly (113) and a second buffer assembly (114) are installed between the inner wall of the shaft assembly (110) and the outer wall of the central shaft (104). The outer wall of the sleeve (108) is provided with a spiral groove (115) extending from the lower end to the upper end. An elastic band (116) is installed in the spiral groove (115). The upper end of the elastic band (116) is fixedly connected to the lower end face of the shaft assembly (110), and the lower end of the elastic band (116) is fixed on the outer wall of the sleeve (108).

2. The impeller structure for a high-speed braiding machine according to claim 1, characterized in that, Multiple annular limiting grooves (117) are sequentially opened on the outer wall of the central shaft (104) from top to bottom. The first buffer assembly (113) includes a spring buffer (118) installed in the annular limiting groove (117). One end of the spring buffer (118) abuts against the inner bottom surface of the annular limiting groove (117), and the other end of the spring buffer (118) abuts against the inner wall of the shaft assembly (110).

3. The impeller structure for a high-speed braiding machine according to claim 2, characterized in that, The lower end of the inner wall of the shaft assembly (110) is formed with a first abutting block (119), and the second buffer assembly (114) includes a first abutting ring (120) fixedly sleeved on the outer wall of the central shaft (104), and a second abutting ring (121) opposite to the first abutting block (119) is fixedly sleeved on the outer wall of the first abutting ring (120).

4. The impeller structure for a high-speed braiding machine according to claim 3, characterized in that, The inner ring of the shaft assembly (110) is fitted with a sealing ring (122) that is sleeved on the central shaft (104) to isolate the first buffer assembly (113). The outer side of the sealing ring (122) is in tight contact with the shaft assembly (110), and the inner side of the sealing ring (122) is in tight contact with the central shaft (104).

5. The impeller structure for a high-speed braiding machine according to claim 4, characterized in that, The first abutting ring (120) comprises a nylon composite ring, and the second abutting ring (121) comprises a highly abrasion resistant polyurethane ring.

6. An impeller structure for a high-speed braiding machine according to any one of claims 1-5, characterized in that, The elastic band (116) includes a highly resilient thermoplastic polyurethane band or a hydrogenated nitrile rubber band.

7. The impeller structure for a high-speed braiding machine according to claim 6, characterized in that, The upper end face of the second boss (106) is uniformly formed with multiple positioning posts (127) along the circumference, and the lower end face of the sleeve (108) is uniformly formed with multiple positioning holes (128) that are respectively inserted and matched with the positioning posts (127).

8. The impeller structure for a high-speed braiding machine according to claim 7, characterized in that, A bearing component (129) is fixedly provided at the lower end of the outer wall of the central shaft (104). The outer wall of the bearing component (129) is fixed on the base plate (102), and the inner wall of the bearing component (129) is fixedly connected to the central shaft (104).

9. The impeller structure for a high-speed braiding machine according to claim 8, characterized in that, The upper end of the central shaft (104) is provided with a first bolt mounting hole (130), and a plurality of second bolt mounting holes (131) are provided at equal intervals around the first bolt mounting hole (130).

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