A drafting structure for a pure cotton yarn drawing frame

Abstract

This utility model relates to the technical field of pure cotton yarn drawing frame accessories, and discloses a drafting structure for a pure cotton yarn drawing frame, including a U-shaped frame. A top frame is fixed to the top of the U-shaped frame, and three drafting roller groups are arranged inside the U-shaped frame. The three drafting roller groups include three driving rollers and three driven rollers. Three square openings are provided on both sides of the U-shaped frame. By setting three sets of driving rollers and driven rollers inside the U-shaped frame, and combining them with the elastic buffer structure formed by the sliding block, the first spring and the second spring, the drafting process can provide a stretching margin for yarn thickness fluctuations while ensuring pressure. At the same time, the servo electric cylinder drives the U-shaped block to rise and fall, and with the adjustment mechanism of the threaded sleeve block and the limit ring, the yarn width is limited and controlled, effectively avoiding drafting displacement. In addition, the fit design of the buffer wheel and the driven roller further improves the safety and smoothness of the drafting process.

Description

Technical Field

[0001] This utility model relates to the technical field of pure cotton yarn drawing frame accessories, specifically a drafting structure for a pure cotton yarn drawing frame. Background Technology

[0002] The drafting structure of the drawing frame is the core mechanism in the spinning drawing process. Through multiple sets of drafting rollers arranged in pairs, the cotton sliver or fiber sliver is drawn in an orderly manner with different speed differences, so that the fibers are fully straightened, dispersed and mixed, thereby improving the evenness of the yarn and providing a stable quality semi-finished product for the subsequent spinning process.

[0003] Existing drawing frame drafting structures often suffer from uneven roller pressure and a lack of elastic buffer adjustment space in the driven rollers during fiber drafting. When the fiber sliver thickness fluctuates, it can easily lead to an imbalance in the distribution of drafting force, resulting in uneven yarn and poor drafting. At the same time, the lack of an effective limiting structure to constrain the fiber sliver can easily cause yarn deviation during drafting, thereby affecting the parallelism and arrangement stability of the fibers, ultimately reducing the quality and production efficiency of subsequent spinning.

[0004] Therefore, it is necessary to design a drafting structure for pure cotton yarn drawing frames to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a drafting structure for a pure cotton yarn drawing frame, which solves the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drafting structure for a pure cotton yarn drawing frame, comprising a U-shaped frame, a top frame fixedly connected to the top of the U-shaped frame, three drafting roller groups arranged inside the U-shaped frame, the three drafting roller groups including three driving rollers and three driven rollers, three square openings on both sides of the U-shaped frame, a second spring fixedly connected to the top of the inner cavity of each square opening, a sliding block fixedly connected to the bottom end of the second spring, insert blocks fixedly connected to both sides of each sliding block, and slots opened on both sides of each square opening. The insert blocks are slidably inserted into the interior of the two slots respectively. The two ends of the three driven rollers are rotatably set on one side of the six sliding blocks respectively. Three buffer wheels are slidably set on the top frame. The three buffer wheels are respectively in contact with the outer surface of the three driven rollers. A servo electric cylinder is fixedly connected to the bottom of the inner cavity of the U-shaped frame. A U-shaped block is fixedly connected to the top of the servo electric cylinder. A rotating shaft is rotatably connected inside the U-shaped block. Both ends of the rotating shaft are threaded with threaded sleeves. An operating connecting ring is fixedly connected to one side of the threaded sleeve. A limit ring is fixedly connected to one side of the operating connecting ring.

[0007] Preferably, both ends of the rotating shaft are provided with threaded grooves, and the two threaded sleeves are respectively threaded into the two threaded grooves. The adjacent sides of the two limiting rings are provided with arc-shaped surfaces, and a gap is formed between the two limiting rings. The diameter of the two operating connecting rings is greater than the diameter of the two limiting rings.

[0008] Preferably, the U-shaped frame has positioning openings on both sides, and the two ends of the U-shaped block are slidably disposed inside the two positioning openings, and the outer surfaces of the two ends of the U-shaped block are respectively in contact with the two sides of the two sliding blocks.

[0009] Preferably, the top of the top frame is slidably connected to three first inserts, the outer surface of the first inserts is sleeved with a first spring, the top and bottom ends of the first inserts are respectively fixed with a limiting piece and an open box, the three buffer wheels are respectively rotatably disposed inside the three open boxes, the top of the top frame is provided with two symmetrical operating ports, and the two operating ports are located on both sides of the central stretching roller group.

[0010] Preferably, the U-shaped block is slidably disposed between the two stretching roller groups, and the top of each of the six square openings is provided with a cylindrical groove, and the top of each of the six openings is fixedly connected with a second insert post, and the top of each of the six second insert posts is slidably inserted into the interior of the six cylindrical grooves.

[0011] Preferably, all three limiting pieces are slidably disposed on the top of the top frame, and the bottom of all three limiting pieces are in contact with the top of the top frame. There are three first springs, and the top and bottom of the three first springs are respectively fixed to the top of the inner cavity of the top frame and the top of the three open boxes.

[0012] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0013] This invention, by setting three sets of active and driven rollers inside the U-shaped frame and combining them with an elastic buffer structure formed by a sliding block, a first spring, and a second spring, provides a stretching margin for yarn thickness fluctuations while ensuring pressure during the drafting process. At the same time, a servo electric cylinder drives the U-shaped block to rise and fall, and in conjunction with the adjustment mechanism of the threaded sleeve block and the limiting ring, it realizes the limiting control of the yarn width, effectively avoiding drafting displacement. In addition, the close fit design of the buffer wheel and the driven roller further improves the safety and smoothness of the drafting process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of the U-shaped frame structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0017] In the diagram: 1. U-shaped frame; 2. Top frame; 4. Operating port; 5. Sliding block; 6. Square opening; 7. Slot; 8. First insert post; 9. Limiting plate; 10. First spring; 11. Insert block; 12. Servo electric cylinder; 13. Second insert post; 14. Second spring; 15. Rotating shaft; 16. Threaded sleeve block; 17. Operating connecting ring; 18. Limiting ring; 19. U-shaped block; 20. Opening box; 21. Buffer wheel; 22. Positioning port. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Obviously, many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Please see Figure 1-3This utility model provides a drafting structure for a pure cotton yarn drawing frame, including a U-shaped frame 1. A top frame 2 is fixedly connected to the top of the U-shaped frame 1. Three drafting roller groups are arranged inside the U-shaped frame 1, including three driving rollers and three driven rollers. Three square openings 6 are provided on both sides of the U-shaped frame 1. A second spring 14 is fixedly connected to the top of the inner cavity of each square opening 6. A sliding block 5 is fixedly connected to the bottom end of the second spring 14. Insert blocks 11 are fixedly connected to both sides of the sliding block 5. Slots 7 are provided on both sides of the opening 6. The two inserts 11 are slidably inserted into the two slots 7 respectively. The two ends of the three driven rollers are rotatably disposed on one side of the six sliding blocks 5. Three buffer wheels 21 are slidably disposed on the top frame 2. The three buffer wheels 21 are respectively in contact with the outer surface of the three driven rollers. A servo electric cylinder 12 is fixedly connected to the bottom of the inner cavity of the U-shaped frame 1. A U-shaped block 19 is fixedly connected to the top of the servo electric cylinder 12. A rotating shaft 15 is rotatably connected inside the U-shaped block 19. Both ends of the rotating shaft 15 are threaded with threaded sleeve blocks 16. An operating connecting ring 17 is fixed to one side of the threaded sleeve block 16, and a limiting ring 18 is fixed to one side of the operating connecting ring 17. When the U-shaped frame 1 is placed on one side of the drawing frame, and three drafting roller groups with different speeds are used to draft the pure cotton yarn, during the drafting process, the elastic sliding of the three driven rollers in the three drafting roller groups and the contact of the three buffer wheels 21 with the three driven rollers respectively ensure that the driven rollers and the driving rollers have elastic expansion and contraction space for lines with fluctuating thickness while ensuring the drafting pressure. This ensures the safety and smoothness of the drafting process. At the same time, the height of the U-shaped block 19 is adjusted by the servo cylinder 12, and the distance between the two limiting rings 18 can be adjusted by rotating the two threaded sleeve blocks 16 using the two operating connecting rings 17, thereby limiting the drafting line and preventing the line from shifting during the drafting process, which would cause the subsequent pure cotton yarn to shift, further improving the safety and smoothness of the drafting process.

[0021] To facilitate adjustment of the spacing between the two limiting rings 18 and thus adapt to the width requirements of the synchronous drawing line, and to better limit the drawing line, threaded grooves are provided at both ends of the rotating shaft 15, and two threaded sleeves 16 are respectively threaded into the two threaded grooves. An arc-shaped surface is provided on the adjacent side of the two limiting rings 18, and a gap is formed between the two limiting rings 18. The diameter of the two operating connecting rings 17 is greater than the diameter of the two limiting rings 18.

[0022] To improve the stability of the sliding and lifting of the U-shaped block 19, positioning openings 22 are provided on both sides of the U-shaped frame 1. The two ends of the U-shaped block 19 are slidably set inside the two positioning openings 22, and the outer surfaces of the two ends of the U-shaped block 19 are respectively in contact with the two sides of the two sliding blocks 5.

[0023] To facilitate the threading of pure cotton yarn and to further improve the elastic sliding stability of the three driven rollers by using the buffer wheel 21, three first inserts 8 are slidably inserted into the top of the top frame 2. A first spring 10 is sleeved on the outer surface of the first insert 8. A limit piece 9 and an open box 20 are fixed to the top and bottom of the first insert 8, respectively. The three buffer wheels 21 are rotatably arranged inside the three open boxes. Two symmetrical operating ports 4 are opened on the top of the top frame 2, and the two operating ports 4 are located on both sides of the central drafting roller group.

[0024] Furthermore, in order to better limit the work of the drawing line, the U-shaped block 19 is slidably set between the two drawing roller groups, and the top of each of the six square openings 6 is provided with a cylindrical groove, and the top of each of the six 5 is fixedly connected with a second insert post 13, and the top of each of the six second insert posts 13 is slidably inserted into the interior of the six cylindrical grooves.

[0025] To improve the stability of the elastic sliding of the three buffer wheels 21 and the three driven rollers, the three limiting plates 9 are all slidably disposed on the top of the top frame 2, and the bottom of the three limiting plates 9 are all in contact with the top of the top frame 2. There are three first springs 10, and the top and bottom of the three first springs 10 are respectively fixed to the top of the inner cavity of the top frame 2 and the top of the three open boxes 20.

[0026] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0027] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0028] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A drafting structure for a pure cotton yarn drawing frame, comprising a U-shaped frame (1), characterized in that: The top of the U-shaped frame (1) is fixedly connected to a top frame (2). Three drawing roller groups are arranged inside the U-shaped frame (1). Each drawing roller group includes three driving rollers and three driven rollers. Three square openings (6) are provided on both sides of the U-shaped frame (1). A second spring (14) is fixedly connected to the top of the inner cavity of each square opening (6). A sliding block (5) is fixedly connected to the bottom end of the second spring (14). Insert blocks (11) are fixedly connected to both sides of each sliding block (5). Slots (7) are provided on both sides of each square opening (6). Two insert blocks (11) are slidably inserted into the interior of two slots (7). The two ends of the three driven rollers are respectively... Rotary arrangement on one side of six sliding blocks (5), three buffer wheels (21) are slidably arranged on the top frame (2), the three buffer wheels (21) respectively fit against the outer surface of three driven rollers, a servo electric cylinder (12) is fixedly connected to the bottom of the inner cavity of the U-shaped frame (1), a U-shaped block (19) is fixedly connected to the top of the servo electric cylinder (12), a rotating shaft (15) is rotatably connected inside the U-shaped block (19), threaded sleeve blocks (16) are threadedly sleeved at both ends of the rotating shaft (15), an operating connecting ring (17) is fixedly connected to one side of the threaded sleeve block (16), and a limit ring (18) is fixedly connected to one side of the operating connecting ring (17).

2. The drafting structure for a pure cotton yarn drawing frame according to claim 1, characterized in that: Both ends of the rotating shaft (15) are provided with threaded grooves, and the two threaded sleeves (16) are respectively threaded into the two threaded grooves. The adjacent sides of the two limiting rings (18) are provided with arc-shaped surfaces, and there is a gap between the two limiting rings (18). The diameter of the two operating connecting rings (17) is greater than the diameter of the two limiting rings (18).

3. The drafting structure for a pure cotton yarn drawing frame according to claim 1, characterized in that: The U-shaped frame (1) has positioning openings (22) on both sides. The two ends of the U-shaped block (19) are slidably disposed inside the two positioning openings (22), and the outer surfaces of the two ends of the U-shaped block (19) are respectively attached to the two sides of the two sliding blocks (5).

4. The drafting structure for a pure cotton yarn drawing frame according to claim 1, characterized in that: The top of the top frame (2) is slidably connected to three first inserts (8), and a first spring (10) is sleeved on the outer surface of the first insert (8). The top and bottom ends of the first insert (8) are respectively fixed to a limiting piece (9) and an open box (20). The three buffer wheels (21) are respectively rotatably arranged inside the three open boxes. The top of the top frame (2) is provided with two symmetrical operating ports (4), and the two operating ports (4) are located on both sides of the central stretching roller group.

5. The drafting structure for a pure cotton yarn drawing frame according to claim 1, characterized in that: The U-shaped block (19) is slidably disposed between the two stretching roller groups. The top of each of the six square openings (6) is provided with a cylindrical groove. The top of each of the six (5) is fixedly connected with a second insert (13). The top ends of the six second inserts (13) are slidably inserted into the interior of the six cylindrical grooves respectively.

6. The drafting structure for a pure cotton yarn drawing frame according to claim 4, characterized in that: The three limiting pieces (9) are all slidably disposed on the top of the top frame (2), and the bottom of the three limiting pieces (9) are all in contact with the top of the top frame (2). There are three first springs (10), and the top and bottom of the three first springs (10) are respectively fixed to the top of the inner cavity of the top frame (2) and the top of the three open boxes (20).

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