Yarn tension mechanism for loom
By designing a yarn tension mechanism using the same driving system in the loom, the yarn wear and rotational asymmetry caused by the not-setting of the driving mechanism of the tension roller is solved, and more uniform tension adjustment and higher production efficiency are achieved.
Patent Information
- Application Number
- CN202510102045.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In traditional looms, the tensioning roller is not equipped with a driving mechanism, which causes friction and wear on the tensioning roller, and the rotation of the tensioning roller and the threading roller are not synchronized, affecting the production of textiles.
A yarn tension mechanism for a weaver is designed, including a first tension roller, a second tension roller, a third tension roller, a lower thread roller and an upper thread roller. The rotation is driven by the same driving system, and the tension adjustment and synchronous rotation are realized through the pulley mechanism and the linkage.
By coordinating the tension, the adjustment range is larger and the yarn tension is more even, which avoids the problem of yarn wear and rotation out of synchronization and improves the production efficiency of textiles.
Smart Images
Figure CN119800582A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of textile equipment, in particular to a yarn tension mechanism for a loom. Background Art
[0002] A loom, also known as a spinning machine, a weaving machine, a cotton spinning machine, etc., is a machine used for weaving. In the weaving process of the textile industry, it is crucial to achieve good control of yarn tension, which is also the most easily overlooked factor in the spinning process. Without proper tension control, many problems will arise in the normal production process, such as frequent yarn breakage and low production efficiency. The mechanism used to adjust the yarn tension in traditional looms is to adjust the height of a roller shaft. This method of adjusting tension has a limited degree of tension adjustment, and the tension of the yarn after adjustment is uneven; The existing patent CN217350220U discloses a tension adjustment mechanism for a loom, which can adjust the distance between two adjacent tension rollers in the vertical direction and the horizontal direction by adjusting the distance between two first sliders by providing a cross-arranged multiple linkage rods, so that the multiple tension rollers can be used to coordinately adjust the tension. In addition, the range of tension adjustment is large, and the tension of the yarn after adjustment is relatively uniform, which solves the problem that the tension adjustment method of the traditional loom has a limited degree of tension adjustment and uneven tension of the yarn after adjustment. In the prior art, most of the tensioning rollers are not provided with a driving mechanism, and the tensioning rollers cannot rotate by themselves. When the yarn is overlapped on the tensioning roller for guidance, the yarn is in a tensioned state and rubs against the tensioning roller during transmission, causing wear of the yarn. Some rotatable tensioning rollers do not use the same driving system as the pay-off roller, so the rotation of the tensioning roller and the pay-off roller may be out of sync, resulting in inconsistent transmission speeds of the yarn and rotation speeds of the pay-off roller. Relative displacement is likely to occur between the two, and the yarn may still wear on the tensioning roller, affecting the production of textiles. Therefore, a yarn tension mechanism for a loom is proposed. Summary of the invention
[0003] The purpose of the present invention is to solve the technical problem that most tensioning rollers are not provided with a driving mechanism, the tensioning roller cannot rotate by itself, and when the yarn is overlapped on the tensioning roller for guidance, since the yarn is in a tensioned state, the yarn will rub against the tensioning roller during transmission, causing the yarn to be worn. Since some rotatable tensioning rollers do not use the same driving system as the pay-off roller, the rotation of the tensioning roller and the pay-off roller will be out of sync, resulting in inconsistent transmission of the yarn and rotation speed of the pay-off roller, and relative displacement is likely to occur between the two. The yarn will still be worn on the tensioning roller, affecting the production of textiles. The present invention provides a yarn tension mechanism for a loom.
[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: The cam is provided with a first tension roller, a second tension roller and a third tension roller, and a shaft rod is coaxially distributed with the cam, and the shaft rod is linked with the second tension roller and the third tension roller through a linkage member. When the shaft rod rotates, the second tension roller and the third tension roller are driven to rotate synchronously in the opposite direction through the linkage member. A lower wire-laying roller and an upper wire-laying roller are rotatably provided on the fixed frame, and the lower wire-laying roller is linked with the upper wire-laying roller through a linkage part. When the lower wire-laying roller rotates, the upper wire-laying roller is driven to rotate synchronously in the opposite direction through the linkage part. The first tension roller, the driving rod and the lower wire-laying roller are connected by a pulley mechanism. A connecting member is provided between the driving rod and the shaft rod, and the driving rod is connected or disconnected with the shaft rod through the connecting member.
[0005] Furthermore, the linkage member includes a fixed gear arranged on the shaft rod, the second tensioning roller is provided with a linkage gear meshing with the fixed gear, and the shaft rod and the third tensioning roller are transmission-connected via a pulley component.
[0006] Furthermore, the driving member includes a driving frame slidably arranged on the frame, a driving screw threadedly penetrating the driving frame is rotatably arranged on the frame, a waist hole is opened on the rotating frame, and two protrusions are arranged on the driving frame, and the two protrusions are respectively slidably matched with the two waist holes.
[0007] Furthermore, the linkage part comprises a linkage rod rotatably arranged on a fixed frame, and the lower pay-off roller and the upper pay-off roller are both transmission-connected to the linkage rod via a bevel gear assembly.
[0008] Furthermore, an adjustment block is slidably provided on the fixed frame, and the upper pay-off roller is rotatably provided on the adjustment block. The linkage rod includes an outer rod rotatably provided on the fixed frame, and an inner rod slidably matched with the outer rod is rotatably provided on the adjustment block. The lower pay-off roller is transmission connected to the outer rod through a bevel gear assembly, and the upper pay-off roller is transmission connected to the inner rod through a bevel gear assembly.
[0009] Furthermore, the outer rod is provided with a central hole and a concave hole that are connected, the inner rod is slidably matched with the central hole, and the inner rod is provided with a convex strip that is slidably matched with the concave hole.
[0010] Furthermore, an adjusting screw is threadedly penetrated on the fixing frame, and a free end of the adjusting screw is rotatably connected to the adjusting block.
[0011] Furthermore, the pulley mechanism comprises a first pulley assembly arranged between the lower pay-off roller and the driving rod, and a second pulley assembly is arranged between the driving rod and the first tensioning roller.
[0012] Furthermore, the connecting member includes a ring plate arranged on the shaft rod, and two connecting blocks are slidably arranged on the driving rod, both of which are in contact with and overlap the inner wall of the ring plate. The driving rod is rotatably provided with forward and reverse screw rods, and the two connecting blocks are respectively threadedly matched with the forward and reverse threaded sections of the forward and reverse screw rods.
[0013] Furthermore, the first tensioning roller, the second tensioning roller, the third tensioning roller, the lower pay-off roller and the upper pay-off roller are all configured with an annular groove.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: in the present invention, the first tensioning roller, the second tensioning roller and the third tensioning roller play a role in cooperatively adjusting the tension, the range of adjusting the tension is large, and the tension of the yarn after adjustment is relatively uniform, which overcomes the problem that the tension adjustment method of the traditional loom has a limited degree of tension adjustment and uneven tension of the spinning line after adjustment. At the same time, the first tensioning roller, the second tensioning roller, the third tensioning roller, the lower wire-paying roller and the upper wire-paying roller are driven to rotate by the same drive system to avoid the phenomenon of asynchronous rotation, thereby reducing the risk of yarn wear and ensuring the production of textiles, and is therefore more practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional diagram of the structure of the present invention; Figure 2 It is a three-dimensional diagram of part of the structure of the present invention; Figure 3 It is a three-dimensional diagram of another part of the structure of the present invention; Figure 4 It is a three-dimensional diagram of another part of the structure of the present invention; Figure 5 For the present invention Figure 4 The enlarged view of point A in the middle; Figure 6 It is an exploded perspective view of part of the structure of the present invention.
[0016] In the figure: 1. frame; 2. first tensioning roller; 3. rotating frame; 4. driving rod; 5. fixed frame; 6. second tensioning roller; 7. third tensioning roller; 8. shaft rod; 9. lower pay-off roller; 10. upper pay-off roller; 11. fixed gear; 12. linkage gear; 13. pulley component; 14. driving frame; 15. driving screw; 16. waist hole; 17. convex block; 18. bevel gear assembly; 19. adjusting block; 20. outer rod; 21. inner rod; 22. adjusting screw; 23. first pulley assembly; 24. second pulley assembly; 25. ring plate; 26. connecting block; 27. forward and reverse screw rods; 28. annular groove. DETAILED DESCRIPTION
[0017] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0018] The present embodiment provides a yarn tension mechanism for a loom, which is mainly used to solve the problem that most tensioning rollers are not provided with a driving mechanism, and the tensioning roller cannot rotate by itself. When the yarn is overlapped on the tensioning roller for guidance, the yarn is in a tensioned state, and the yarn will rub against the tensioning roller during transmission, causing the yarn to wear. Some rotatable tensioning rollers do not use the same driving system as the pay-off roller, so the rotation of the tensioning roller and the pay-off roller will be out of sync, resulting in inconsistent yarn transmission and rotation speeds of the pay-off roller, and relative displacement is likely to occur between the two. The yarn will still wear on the tensioning roller, affecting the production of textiles. The following technical solutions are provided. Figure 1-Figure 6 Make a detailed description: A yarn tension mechanism for a loom comprises a frame 1, on which a first tensioning roller 2, two rotating frames 3 and two driving rods 4 are rotatably arranged, a driving member and two fixed frames 5 are arranged on the frame 1, and the two rotating frames 3 are driven to rotate synchronously in the opposite direction by the driving member, a second tensioning roller 6, a third tensioning roller 7 and a shaft rod 8 are rotatably arranged on the rotating frame 3, the shaft rod 8 is coaxially distributed with the rotating frame 3, the shaft rod 8 is linked with the second tensioning roller 6 and the third tensioning roller 7 through a linkage member, and when the shaft rod 8 rotates, the second tensioning roller 6 and the third tensioning roller 7 are driven to rotate synchronously in the opposite direction through the linkage member, and the synchronous reverse rotation here means that the second tensioning roller 6 and the shaft rod 8 rotate in the opposite direction, and the third tensioning roller 7 and the shaft rod 8 rotate in the same direction, a lower wire-releasing roller 9 and an upper wire-releasing roller 10 are rotatably arranged on the fixed frame 5, the lower wire-releasing roller 9 is linked with the upper wire-releasing roller 10 through a linkage part, and when the lower wire-releasing roller 9 rotates, the upper wire-releasing roller 10 is driven by the linkage part The pay-off rollers 10 rotate synchronously in opposite directions, and the first tensioning roller 2, the driving rod 4 and the lower pay-off roller 9 are connected by a pulley mechanism. When any one of the first tensioning roller 2, the driving rod 4 and the lower pay-off roller 9 rotates, the pulley mechanism drives the other multiple pay-off rollers to rotate synchronously in the same direction. A connecting piece is provided between the driving rod 4 and the shaft rod 8, and the driving rod 4 is connected or disconnected from the shaft rod 8 by the connecting piece. When the driving rod 4 is connected to the shaft rod 8 by rotation, the shaft rod 8 is driven to rotate synchronously by the rotation of the driving rod 4. When the driving rod 4 is disconnected from the shaft rod 8, the driving rod 4 cannot drive the shaft rod 8 to rotate synchronously. The first tensioning roller 2, the driving rod 4, the second tensioning roller 6, the third tensioning roller 7, the shaft rod 8, the lower pay-off roller 9 and the upper pay-off roller 10 are all in a horizontal direction, the second tensioning roller 6 is close to the first tensioning roller 2, the third tensioning roller 7 is close to the upper pay-off roller 10, and the upper pay-off roller 10 and the lower pay-off roller 9 are spaced apart from each other. When the yarn is transmitted, any one of the first tensioning roller 2, the driving rod 4 and the lower tensioning roller 9 is driven to rotate, and the other multiple tensioning rollers are driven to rotate synchronously in the same direction through the pulley mechanism. When the driving rod 4 rotates, the shaft rod 8 is driven to rotate synchronously. When the shaft rod 8 rotates, the second tensioning roller 9 and the upper tensioning roller 10 are driven to rotate synchronously. The rollers 7 rotate synchronously in the opposite direction. When the lower pay-off roller 9 rotates, the upper pay-off roller 10 is driven to rotate synchronously in the opposite direction through the linkage part, that is, the first tensioning roller 2, the third tensioning roller 7 and the lower pay-off roller 9 rotate synchronously and the rotation direction is all in the positive direction, and the second tensioning roller 6 rotates synchronously with the upper pay-off roller 10 and the rotation direction is all in the opposite direction, so as to convey the yarn. When it is necessary to adjust the tension of the yarn, the driving rod 4 is disconnected from the shaft rod 8 by the connecting piece, and the two rotating frames 3 are driven by the driving piece to rotate synchronously in the opposite direction until they both tend to the horizontal direction. In this process, the second tensioning roller 6 moves downward to away from the first tensioning roller 2, and the third tensioning roller 7 moves upward to away from the upper pay-off roller 10, so as to increase the tension of the yarn. Conversely, the two rotating frames 3 are driven by the driving piece to rotate synchronously in the opposite direction until they both tend to the inclined direction, the second tensioning roller 6 moves upward to close to the first tensioning roller 2, and the third tensioning roller 7 moves downward to close to the upper pay-off roller 10, so as to reduce the tension of the yarn. In summary, when the present application is in use, the first tensioning roller 2, the second tensioning roller 6 and the third tensioning roller 7 play a role in cooperatively adjusting the tension. The range of adjusting the tension is large, and the yarn tension after adjustment is relatively uniform, which overcomes the problem that the tension adjustment method of the traditional loom has a limited degree of tension adjustment and the tension of the spinning line is uneven after adjustment. At the same time, the first tensioning roller 2, the second tensioning roller 6, the third tensioning roller 7, the lower wire-paying roller 9 and the upper wire-paying roller 10 are driven to rotate by the same drive system to avoid the phenomenon of asynchronous rotation, thereby reducing the risk of yarn wear and ensuring the production of textiles, and is therefore more practical.
[0019] like Figure 3As shown, in this embodiment, the linkage member includes a fixed gear 11 arranged on the shaft 8, the fixed gear 11 is in a vertical direction and fixed on the shaft 8, and the second tensioning roller 6 is provided with a linkage gear 12 meshing with the fixed gear 11, the linkage gear 12 is in a vertical direction and fixed on the second tensioning roller 6, the shaft 8 and the third tensioning roller 7 are connected by a pulley component 13, the pulley component 13 includes two pulleys and a connecting belt, the two pulleys are in a vertical direction and are respectively fixed on the shaft 8 and the third tensioning roller 7, and the connecting belt is sleeved on the two pulleys; Referring to the above, when the shaft 8 rotates, it drives the fixed gear 11 to rotate together, and the linkage gear 12 will rotate in the opposite direction due to the meshing action and drive the second tensioning roller 6 to rotate together, and drive the third tensioning roller 7 to rotate synchronously through the pulley component 13, so that the second tensioning roller 6 and the shaft 8 rotate in the opposite direction, and the third tensioning roller 7 and the shaft 8 rotate in the same direction.
[0020] like Figure 2 As shown, in this embodiment, the driving member includes a driving frame 14 slidably arranged on the frame 1, the driving frame 14 slides in the vertical direction, and a driving screw 15 with a thread penetrating the driving frame 14 is rotatably arranged on the frame 1, and the driving screw 15 is in a vertical direction. A waist hole 16 is opened on the rotating frame 3, and the waist hole 16 is opened along the length direction of the rotating frame 3. The waist hole 16 has an initial point and a limit point that are relatively distributed. Two protrusions 17 are arranged on the driving frame 14, and the protrusions 17 are in a horizontal direction and fixed on the driving frame 14. The two protrusions 17 are respectively slidably matched with the two waist holes 16; Referring to the above, in the initial state, the driving frame 14 is located at the initial position, the waist hole 16 is in an inclined direction, and the initial point and the limit point are distributed up and down, the two protrusions 17 are respectively located at the two initial points, and the two rotating frames 3 are both in an inclined direction. When in use, the driving screw 15 is rotated forward, and the driving frame 14 will slide downward to the limit position due to the action of the thread. During this process, the two protrusions 17 slide from the two initial points to the two limit points respectively, thereby driving the two rotating frames 3 to rotate synchronously in the opposite direction until both tend to the horizontal direction. Conversely, the driving screw 15 is reversed, and the driving frame 14 will slide upward to the initial position due to the action of the thread. During this process, the two protrusions 17 slide from the two limit points to the two initial points respectively, thereby driving the two rotating frames 3 to rotate synchronously in the opposite direction until both are in an inclined direction.
[0021] like Figure 6 As shown, in this embodiment, the linkage part includes a linkage rod rotatably arranged on the fixed frame 5, the linkage rod is in a vertical direction, the lower pay-off roller 9 and the upper pay-off roller 10 are both connected to the linkage rod through a bevel gear assembly 18, and the bevel gear assembly 18 includes two meshing bevel gears, two bevel gears of one bevel gear assembly 18 are respectively fixed on the lower pay-off roller 9 and the linkage rod, and two bevel gears of the other bevel gear assembly 18 are respectively fixed on the upper pay-off roller 10 and the linkage rod; Referring to the above, when the lower pay-off roller 9 rotates, one of the bevel gear assemblies 18 drives the linkage rod to rotate. When the linkage rod rotates, the other bevel gear assembly 18 drives the upper pay-off roller 10 to rotate. The upper pay-off roller 10 rotates in opposite directions to the lower pay-off roller 9.
[0022] like Figure 6 As shown, in this embodiment, an adjusting block 19 is slidably provided on the fixed frame 5, and the adjusting block 19 slides in the vertical direction. The upper pay-off roller 10 is rotatably provided on the adjusting block 19, and the linkage rod includes an outer rod 20 rotatably provided on the fixed frame 5, and an inner rod 21 slidably matched with the outer rod 20 is rotatably provided on the adjusting block 19, and the inner rod 21 and the outer rod 20 are both in the vertical direction and slidably matched in the vertical direction, and the lower pay-off roller 9 is connected to the outer rod 20 through the bevel gear assembly 18, and the upper pay-off roller 10 is connected to the inner rod 21 through the bevel gear assembly 18; Referring to the above, in the initial state, the adjustment block 19 is located at the initial position, and the upper pay-off roller 10 is close to the lower pay-off roller 9. In actual use, the adjustment block 19 can be driven to slide upward to the limit position, driving the upper pay-off roller 10 to move away from the lower pay-off roller 9, so as to adjust the distance between the lower pay-off roller 9 and the upper pay-off roller 10 to adapt to yarns of different sizes and improve the flexibility and applicability of use. When the adjustment block 19 slides, it drives the inner rod 21 to slide upward together. When the lower pay-off roller 9 rotates, the outer rod 20 is driven to rotate through the bevel gear assembly 18. When the outer rod 20 rotates, it drives the inner rod 21 to rotate. When the inner rod 21 rotates, the upper pay-off roller 10 is driven to rotate through the bevel gear assembly 18, so as to realize the synchronous reverse rotation of the upper pay-off roller 10 and the lower pay-off roller 9 without being affected by the change in the distance between the two, which is more convenient to use.
[0023] like Figure 6 As shown, in this embodiment, the outer rod 20 is provided with a central hole and a concave hole in communication, both of which are in a vertical direction, the inner rod 21 is slidably matched with the central hole, and the inner rod 21 is provided with a convex strip that is slidably matched with the concave hole, which is in a vertical direction and fixed on the outer surface of the inner rod 21; Referring to the above, when the adjustment block 19 slides, the inner rod 21 slides in the center hole, and the convex strip slides in the concave hole. When the outer rod 20 rotates, the inner rod 21 is driven to rotate together through the cooperation of the convex strip and the concave hole.
[0024] like Figure 6 As shown, in this embodiment, an adjusting screw 22 is threaded through the fixing frame 5, the adjusting screw 22 is in a vertical direction, and the free end of the adjusting screw 22 is rotatably connected to the adjusting block 19; Referring to the above, when in use, the adjusting screw 22 is driven to rotate forward, and the adjusting screw 22 will move upward due to the action of the thread, thereby driving the adjusting block 19 to slide upward. Conversely, the adjusting screw 22 is driven to rotate reversely, and the adjusting screw 22 will move downward due to the action of the thread, thereby driving the adjusting block 19 to slide downward.
[0025] like Figure 4 As shown, in this embodiment, the pulley mechanism includes a first pulley assembly 23 arranged between the lower pay-off roller 9 and the driving rod 4, the first pulley assembly 23 includes two pulleys and a connecting belt, the two pulleys are respectively fixed on the lower pay-off roller 9 and the driving rod 4, the connecting belt is wound around the two pulleys, and a second pulley assembly 24 is arranged between the driving rod 4 and the first tensioning roller 2, the second pulley assembly 24 includes two pulleys and a connecting belt, the two pulleys are respectively fixed on the driving rod 4 and the first tensioning roller 2, and the connecting belt is wound around the two pulleys; Referring to the above, when the first tensioning roller 2 rotates, the two driving rods 4 are driven to rotate synchronously through the two second pulley assemblies 24, and then the two lower pay-off rollers 9 are driven to rotate synchronously through the two first pulley assemblies 23.
[0026] like Figure 3-Figure 5 As shown, in this embodiment, the connecting member includes a ring plate 25 arranged on the shaft rod 8, the ring plate 25 is in a vertical direction and fixed on the shaft rod 8, and two connecting blocks 26 are slidably arranged on the driving rod 4, both of which are in contact with and overlapped with the inner wall of the ring plate 25, and the sliding direction of the connecting block 26 is perpendicular to the axis of the driving rod 4. The driving rod 4 is rotatably provided with a positive and negative screw rod 27, and the positive and negative screw rod 27 is perpendicular to the axis of the driving rod 4. The two connecting blocks 26 are respectively threadedly matched with the positive and negative thread segments of the positive and negative screw rod 27; Referring to the above, in the initial state, the two connecting blocks 26 are far away from each other and both are in contact with the inner wall of the ring plate 25. When the drive rod 4 rotates, the forward and reverse screw rods 27 and the two connecting blocks 26 are driven to rotate together, thereby driving the ring plate 25 and the shaft rod 8 to rotate together to realize the transmission connection between the drive rod 4 and the shaft rod 8. Conversely, the forward and reverse screw rods 27 are driven to reverse, and the two connecting blocks 26 slide synchronously in opposite directions due to the action of the forward and reverse threads until they are close to each other. The two connecting blocks 26 are far away from the inner wall of the ring plate 25. At this time, even if the drive rod 4 rotates, it cannot drive the shaft rod 8 to rotate, so as to disconnect the drive rod 4 from the shaft rod 8.
[0027] like Figure 3 As shown, in this embodiment, the first tensioning roller 2, the second tensioning roller 6, the third tensioning roller 7, the lower pay-off roller 9 and the upper pay-off roller 10 are all configured with an annular groove 28, and the annular groove 28 is in a vertical direction; Referring to the above, after the free end of the yarn passes between the lower pay-off roller 9 and the upper pay-off roller 10 located on the same fixed frame 5, the free end of the yarn is then passed around one of the third tensioning rollers 7, one of the second tensioning rollers 6, the first tensioning roller 2, the other second tensioning roller 6 and the other third tensioning roller 7 in sequence, and then the free end of the yarn is passed between the lower pay-off roller 9 and the upper pay-off roller 10 on another fixed frame 5, so that the yarn is located in the annular groove 28. When the yarn is transmitted, the yarn is guided and limited by multiple annular grooves 28 to prevent the yarn from shifting horizontally.
[0028] The working process of the present invention is as follows: the free end of the yarn is passed between the lower pay-off roller 9 and the upper pay-off roller 10 located on the same fixed frame 5, and then the free end of the yarn is passed around one of the third tensioning rollers 7, one of the second tensioning rollers 6, the first tensioning roller 2, the other second tensioning roller 6 and the other third tensioning roller 7 in sequence, and then the free end of the yarn is passed between the lower pay-off roller 9 and the upper pay-off roller 10 on the other fixed frame 5. When the yarn is transmitted, any one of the first tensioning roller 2, the driving rod 4 and the lower pay-off roller 9 is driven to rotate, and the other multiple rollers are driven to rotate synchronously in the same direction through the pulley mechanism. When the driving rod 4 rotates, the shaft rod 8 is driven to rotate synchronously. When the shaft rod 8 rotates, the second tensioning roller 6 and the third tensioning roller 7 are driven to rotate synchronously in the opposite direction through the linkage member. When the lower pay-off roller 9 rotates, the upper pay-off roller 10 is driven to rotate synchronously in the opposite direction through the linkage part. The first tensioning roller 2, the third tensioning roller 7 and the lower pay-off roller 9 rotate synchronously and the rotation direction is positive, the second tensioning roller 6 and the upper pay-off roller 10 rotate synchronously and the rotation direction is reverse, so as to convey the yarn. When it is necessary to adjust the tension of the yarn, the driving rod 4 is disconnected from the shaft rod 8 by the connecting piece, and the two rotating frames 3 are driven by the driving piece to rotate synchronously in the opposite direction until they are both horizontal. During this process, the second tensioning roller 6 moves downward to away from the first tensioning roller 2, and the third tensioning roller 7 moves upward to away from the upper pay-off roller 10, so as to increase the tension of the yarn. Conversely, the two rotating frames 3 are driven by the driving piece to rotate synchronously in the opposite direction until they are both inclined, the second tensioning roller 6 moves upward to close to the first tensioning roller 2, and the third tensioning roller 7 moves downward to close to the upper pay-off roller 10, so as to reduce the tension of the yarn.
[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A yarn tension mechanism for a loom, characterized in that: The invention comprises a frame (1), wherein a first tensioning roller (2), two rotating frames (3) and two driving rods (4) are rotatably arranged on the frame (1), a driving member and two fixed frames (5) are arranged on the frame (1), and the two rotating frames (3) are driven by the driving member to rotate synchronously in opposite directions, and a second tensioning roller (6), a third tensioning roller (7) and a shaft rod (8) are rotatably arranged on the rotating frame (3), and the shaft rod (8) is coaxially distributed with the rotating frame (3), and the shaft rod (8) is linked with the second tensioning roller (6) and the third tensioning roller (7) through a linkage member, and when the shaft rod (8) rotates, the linkage member drives the second tensioning roller (6) and the third tensioning roller (7) to rotate. The tensioning roller (6) and the third tensioning roller (7) rotate synchronously in opposite directions. A lower wire-releasing roller (9) and an upper wire-releasing roller (10) are rotatably arranged on the fixed frame (5). The lower wire-releasing roller (9) is linked with the upper wire-releasing roller (10) via a linkage portion. When the lower wire-releasing roller (9) rotates, the upper wire-releasing roller (10) is driven to rotate synchronously in opposite directions via the linkage portion. The first tensioning roller (2), the driving rod (4) and the lower wire-releasing roller (9) are connected in transmission via a pulley mechanism. A connecting piece is arranged between the driving rod (4) and the shaft rod (8), and the driving rod (4) and the shaft rod (8) are connected in transmission or disconnected via the connecting piece.
2. The yarn tension mechanism for a loom according to claim 1, characterized in that: The linkage member comprises a fixed gear (11) arranged on the shaft (8); the second tensioning roller (6) is provided with a linkage gear (12) meshing with the fixed gear (11); the shaft (8) and the third tensioning roller (7) are connected in transmission via a pulley component (13).
3. The yarn tension mechanism for a loom according to claim 1, characterized in that: The driving member comprises a driving frame (14) slidably arranged on the frame (1); a driving screw (15) is rotatably arranged on the frame (1) and is threadedly penetrated through the driving frame (14); a waist hole (16) is opened on the rotating frame (3); and two protrusions (17) are arranged on the driving frame (14); the two protrusions (17) are respectively slidably matched with the two waist holes (16).
4. The yarn tension mechanism for a loom according to claim 1, characterized in that: The linkage part comprises a linkage rod rotatably arranged on a fixed frame (5), and the lower pay-off roller (9) and the upper pay-off roller (10) are both transmission-connected to the linkage rod via a bevel gear assembly (18).
5. The yarn tension mechanism for a loom according to claim 4, characterized in that: An adjusting block (19) is slidably arranged on the fixed frame (5), the upper pay-off roller (10) is rotatably arranged on the adjusting block (19), the linkage rod comprises an outer rod (20) rotatably arranged on the fixed frame (5), an inner rod (21) slidably matched with the outer rod (20) is rotatably arranged on the adjusting block (19), the lower pay-off roller (9) is transmission-connected to the outer rod (20) via a bevel gear assembly (18), and the upper pay-off roller (10) is transmission-connected to the inner rod (21) via a bevel gear assembly (18).
6. The yarn tension mechanism for a loom according to claim 5, characterized in that: The outer rod (20) is provided with a central hole and a concave hole that are connected, the inner rod (21) is slidably engaged with the central hole, and the inner rod (21) is provided with a convex strip that is slidably engaged with the concave hole.
7. The yarn tension mechanism for a loom according to claim 5, characterized in that: An adjusting screw rod (22) is threadedly passed through the fixing frame (5), and a free end of the adjusting screw rod (22) is rotatably connected to the adjusting block (19).
8. The yarn tension mechanism for a loom according to claim 1, characterized in that: The pulley mechanism comprises a first pulley assembly (23) arranged between a lower pay-off roller (9) and a driving rod (4), and a second pulley assembly (24) is arranged between the driving rod (4) and a first tensioning roller (2).
9. The yarn tension mechanism for a loom according to claim 1, characterized in that: The connecting member comprises a ring plate (25) arranged on the shaft (8); two connecting blocks (26) are slidably arranged on the driving rod (4) and are both in contact with and overlapped with the inner wall of the ring plate (25); a forward and reverse screw rod (27) is rotatably arranged on the driving rod (4); and the two connecting blocks (26) are respectively threadedly engaged with the forward and reverse thread segments of the forward and reverse screw rod (27).
10. The yarn tension mechanism for a loom according to claim 1, characterized in that: The first tensioning roller (2), the second tensioning roller (6), the third tensioning roller (7), the lower pay-off roller (9) and the upper pay-off roller (10) are all configured with an annular groove (28).