Anti-twisting yarn guide device

Abstract

The utility model discloses an anti-twisting yarn guide device, which belongs to the technical field of devices for composite material production, and comprises an inner ring and an outer ring, the outer ring is sleeved outside the inner ring, the inner ring is rotatably connected with the outer ring, the inner ring is provided with a yarn passing hole, two shaft sleeves are rotatably connected in the yarn passing hole, the axis of each shaft sleeve is perpendicular to the axis of the inner ring, and a yarn passes through the space between the two shaft sleeves; two limiting columns are fixedly connected to the outer side wall of the inner ring and symmetrically arranged, two limiting holes are formed in the side wall of the outer ring, the two limiting columns penetrate through the two limiting holes respectively, and when the inner ring rotates, the two limiting columns slide in the two limiting holes respectively. On the premise that yarn abrasion is not increased, the twisting angle of the yarn in the running process can be limited, and the yarn is prevented from being twisted or folded.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for composite material production, and in particular to a yarn guiding device for preventing twisting. Background Technology

[0002] In the production of prepregs, yarn twisting in the unwinding section is a key factor affecting product quality and performance, especially for low basis weight prepregs, where the uniformity of fiber arrangement is more sensitive to product performance. Yarn twisting can lead to problems such as insufficient yarn unfolding in the later stages, which can significantly reduce the mechanical properties and process stability of composite materials.

[0003] Therefore, a yarn guiding device to prevent twisting is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a yarn guiding device to prevent twisting, aiming to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a yarn guiding device for preventing twisting, comprising an inner ring and an outer ring, wherein the outer ring is sleeved outside the inner ring, and the inner ring is rotatably connected to the outer ring. A yarn passage hole is provided on the inner ring, and two bushings are rotatably connected in the yarn passage hole. The axis of the bushings is perpendicular to the axis of the inner ring, and the yarn passes through the two bushings.

[0006] Two limiting posts are fixed to the outer side wall of the inner ring. The two limiting posts are symmetrically arranged. Two limiting holes are opened on the side wall of the outer ring. The two limiting posts pass through the two limiting holes respectively. When the inner ring rotates, the two limiting posts slide in the two limiting holes respectively.

[0007] Preferably, a locking knob is threaded onto the limiting post. The locking knob is located outside the outer ring. When it is necessary to lock the inner ring, the locking knob is tightened so that the locking knob presses against the outer wall of the outer ring.

[0008] Preferably, slots are provided on the opposite side walls of the yarn passage hole, the bushing is rotatably sleeved on the outside of the central shaft, the bushing is coaxially arranged with the central shaft, and the two ends of the central shaft are respectively located in the two slots.

[0009] Preferably, the slot is rectangular, and the ends of the two central shafts within the slot are arranged along the length of the slot.

[0010] Preferably, the central shaft slides in contact with the side wall of the slot along the length direction of the slot, and a top shaft spring is fixedly connected to one end of the slot. The top shaft spring abuts against the side wall of one of the central shafts and extends and retracts along the length direction of the slot.

[0011] Preferably, two arc-shaped grooves are formed on the outer side wall of the inner ring, and multiple rollers are rotatably connected in the arc-shaped grooves. An annular groove is formed on the inner side wall of the outer ring, and the annular groove communicates with the limiting hole. The rollers protrude out of the arc-shaped grooves and extend into the annular grooves, and the rollers make rolling contact with the annular grooves.

[0012] Preferably, a bracket is fixed to the outer ring, and the end of the bracket away from the outer ring has a threaded section.

[0013] This utility model discloses the following technical effects: The yarn passes between the two bushings of the yarn passage hole. As the yarn passes through, it drives the bushings to rotate, reducing yarn damage caused by friction. When the yarn deflects, it causes the inner ring to rotate on the outer ring, thereby causing the limiting post to slide within the limiting hole. When the limiting post slides to the end of the limiting hole, it stops rotating, thus limiting the rotation angle of the inner ring and consequently limiting the deflection angle of the yarn during passage, preventing fiber twisting. This utility model can limit the twisting angle of the yarn during operation without increasing yarn wear, preventing yarn twisting or folding. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the inner ring structure in this utility model;

[0017] Figure 3 This is a schematic diagram of the outer ring structure in this utility model;

[0018] Figure 4 This is a schematic diagram of the card slot structure in this utility model.

[0019] In the diagram: 1. Inner ring; 2. Outer ring; 3. Bracket; 4. Yarn passage hole; 5. Central shaft; 6. Slot; 7. Bushing; 8. Top shaft spring; 9. Limiting post; 10. Locking knob; 11. Arc-shaped groove; 12. Roller; 13. Annular groove; 14. Limiting hole. Detailed Implementation

[0020] 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.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-4 This utility model provides a yarn guiding device for preventing twisting, including: an inner ring 1 and an outer ring 2. The outer ring 2 is sleeved outside the inner ring 1. The inner ring 1 and the outer ring 2 are rotatably connected. A yarn passage hole 4 is opened on the inner ring 1. Two bushings 7 are rotatably connected in the yarn passage hole 4. The axis of the bushings 7 is perpendicular to the axis of the inner ring 1. The yarn passes through the two bushings 7.

[0023] Two limiting posts 9 are fixed to the outer side wall of the inner ring 1. The two limiting posts 9 are symmetrically arranged. Two limiting holes 14 are opened on the side wall of the outer ring 2. The two limiting posts 9 pass through the two limiting holes 14 respectively. When the inner ring 1 rotates, the two limiting posts 9 slide in the two limiting holes 14 respectively.

[0024] The yarn passes through the two bushings 7 of the yarn passage hole 4. When the yarn passes through, it can drive the bushings 7 to rotate, reducing yarn damage caused by friction. When the yarn deflects, it drives the inner ring 1 to rotate in the outer ring 2, thereby driving the limiting post 9 to slide in the limiting hole 14. When the limiting post 9 slides to the end of the limiting hole 14, it stops rotating, thereby limiting the rotation angle of the inner ring 1, and thus limiting the deflection angle of the yarn when it passes through, preventing fiber twisting.

[0025] In some alternative embodiments, a locking knob 10 is threaded onto the limiting post 9. The locking knob 10 is located outside the outer ring 2. When it is necessary to lock the inner ring 1, the locking knob 10 is tightened so that the locking knob 10 presses against the outer wall of the outer ring 2.

[0026] When the locking knob 10 is located at the end of the limiting post 9 and has a gap with the side wall of the outer ring 2, the limiting post 9 can slide in the limiting hole 14. When it is necessary to lock the yarn at a specific angle, the locking knob 10 is tightened and pressed against the outer side wall of the outer ring 2 to prevent the limiting post 9 from sliding, thereby locking the inner ring 1.

[0027] In some optional embodiments, slots 6 are respectively provided on the two opposite side walls of the yarn passage hole 4, and the bushing 7 is rotatably sleeved on the outside of the central shaft 5. The bushing 7 is coaxially arranged with the central shaft 5, and the two ends of the central shaft 5 are respectively located in the two slots 6.

[0028] In some alternative embodiments, the slot 6 is rectangular, and the ends of the two central shafts 5 inside the slot 6 are arranged along the length of the slot 6.

[0029] In some alternative embodiments, the central shaft 5 slides in contact with the side wall of the slot 6 along the length direction of the slot 6, and a top shaft spring 8 is fixedly connected to one end of the slot 6. The top shaft spring 8 abuts against the side wall of one of the central shafts 5, and the top shaft spring 8 extends and retracts along the length direction of the slot 6.

[0030] The top spring 8 applies pressure to the central shaft 5, causing the two bushings 7 to automatically come together. When the yarn passes through, the movement of the yarn drives the two bushings 7 to rotate.

[0031] Furthermore, a sliding groove can be opened at one end of the slot 6, one end of the top shaft spring 8 is fixed in the sliding groove, and the other end extends out of the sliding groove. A sliding sleeve is installed on the top shaft spring 8, and the sliding sleeve slides in the sliding groove. The top shaft spring 8 abuts against the side wall of one of the central shafts 5 through the sliding sleeve. The direction of the elastic force of the top shaft spring 8 can be limited by the sliding sleeve to ensure the axial extension and contraction of the top shaft spring 8.

[0032] In some optional embodiments, two arc-shaped grooves 11 are provided on the outer side wall of the inner ring 1, and multiple rollers 12 are rotatably connected in the arc-shaped grooves 11. An annular groove 13 is provided on the inner side wall of the outer ring 2. The annular groove 13 communicates with the limiting hole 14. The rollers 12 protrude out of the arc-shaped grooves 11 and extend into the annular groove 13, and the rollers 12 and the annular groove 13 make rolling contact.

[0033] Two arc-shaped grooves 11 are symmetrically arranged on the inner ring 1. The diameter of the roller 12 is greater than the depth of the arc-shaped grooves 11, so that it can protrude from the arc-shaped grooves 11. When the roller 12 is installed on the inner ring 1, the two are regarded as a whole structure. The diameter of this whole structure is greater than the diameter of the inner ring 1.

[0034] The outer diameter of the annular groove 13 (i.e., the diameter at the largest circle) is slightly larger than the diameter of the overall structure of the inner ring 1 after the roller 12 is installed; the inner diameter of the annular groove 13 (i.e., the diameter at the smallest circle) is larger than the outer wall diameter of the inner ring 1, but smaller than the diameter of the overall structure of the inner ring 1 after the roller 12 is installed, thus ensuring that the inner ring 1 can rotate flexibly within the outer ring 2.

[0035] In some alternative embodiments, a bracket 3 is fixed to the outer ring 2, and the end of the bracket 3 away from the outer ring 2 has a threaded section, so that it can be mounted on a base.

[0036] In use, the device is mounted on the base via the bracket 3. The top spring 8 provides a clamping force to the two bushings 7. When the yarn passes between the two bushings 7, it can drive the bushings 7 to rotate, reducing yarn damage caused by friction. When the yarn deflects, it drives the inner ring 1 to rotate within the outer ring 2, thereby driving the limiting post 9 to slide within the limiting hole 14. When the limiting post 9 slides to the end of the limiting hole 14, it stops rotating, thus limiting the rotation angle of the inner ring 1, thereby limiting the deflection angle of the yarn when it passes through, and preventing fiber twisting.

[0037] When it is necessary to lock the yarn at a specific angle, simply tighten the locking knob 10 to press it against the outer wall of the outer ring 2.

[0038] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A yarn guide device for preventing twisting, characterized by comprising: It includes an inner ring (1) and an outer ring (2). The outer ring (2) is sleeved outside the inner ring (1). The inner ring (1) and the outer ring (2) are rotatably connected. The inner ring (1) has a yarn passage hole (4). Two bushings (7) are rotatably connected inside the yarn passage hole (4). The axis of the bushing (7) is perpendicular to the axis of the inner ring (1). The yarn passes through the two bushings (7). Two limiting posts (9) are fixed to the outer side wall of the inner ring (1). The two limiting posts (9) are symmetrically arranged. Two limiting holes (14) are opened on the side wall of the outer ring (2). The two limiting posts (9) pass through the two limiting holes (14) respectively. When the inner ring (1) rotates, the two limiting posts (9) slide in the two limiting holes (14) respectively.

2. The kink-resistant yarn guide of claim 1, wherein: The limiting post (9) is threaded with a locking knob (10). The locking knob (10) is located outside the outer ring (2). When it is necessary to lock the inner ring (1), tighten the locking knob (10) so that the locking knob (10) presses against the outer wall of the outer ring (2).

3. The kink-resistant yarn guide of claim 1, wherein: The yarn passage hole (4) has slots (6) on its opposite side walls. The bushing (7) is rotatably sleeved on the outside of the central shaft (5). The bushing (7) is coaxial with the central shaft (5). The two ends of the central shaft (5) are located in the two slots (6) respectively.

4. The kink-resistant yarn guide of claim 3, wherein: The slot (6) is rectangular, and the ends of the two central shafts (5) inside the slot (6) are arranged along the length of the slot (6).

5. The kink-resistant yarn guide of claim 3, wherein: The central shaft (5) slides in contact with the side wall of the slot (6) along the length direction of the slot (6). A top shaft spring (8) is fixed to one end of the slot (6). The top shaft spring (8) abuts against the side wall of one of the central shafts (5). The top shaft spring (8) extends and retracts along the length direction of the slot (6).

6. The anti-twisting yarn guiding device according to claim 1, characterized in that: Two arc-shaped grooves (11) are provided on the outer side wall of the inner ring (1). Multiple rollers (12) are rotatably connected in the arc-shaped grooves (11). An annular groove (13) is provided on the inner side wall of the outer ring (2). The annular groove (13) communicates with the limiting hole (14). The rollers (12) protrude out of the arc-shaped grooves (11) and extend into the annular grooves (13). The rollers (12) and the annular grooves (13) are in rolling contact.

7. The kink-resistant yarn guide of claim 1, wherein: A bracket (3) is fixedly connected to the outer ring (2), and the end of the bracket (3) away from the outer ring (2) has a threaded section.

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