Spinning drafting assembly

Abstract

The invention relates to the technical field of spinning equipment, in particular to a spinning drafting assembly which comprises a base frame and a lifting frame arranged on the base frame, a lower roller is arranged on the base frame, a front roller and a rear roller are arranged on the lifting frame, and a plurality of opening drafting rollers are arranged in the middle of the lifting frame. Spinning yarn is attached to the outer edge of the lower roller and the outer edge of the opening drafting roller in an attached mode, spinning drafting operation is completed in the mode that the attaching distance is gradually reduced, the extensibility of the spinning yarn in the transverse direction or the longitudinal direction is enhanced, and a limiting mode of traditional clamping drafting is not adopted. Meanwhile, when the yarn is stretched under slight tension fluctuation, the first spring on the corresponding side can be stressed and compressed, that is, the spring drives the movable yarn guide wheel to slide in the sliding groove, the snakelike shapes of the original movable yarn guide wheel and the fixed yarn guide wheel are respectively released, the spun yarn is lengthened on a drafting path, and the yarn breaking condition is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of spinning equipment, in particular to a spinning drafting component. Background Art

[0002] In order to meet the requirements of yarn fineness in different uses and reduce the irregular thickness of fiber strips or rovings, it is necessary to stretch the spun yarn. In the existing spinning process, the yarn stretching method usually adopts a multi-roller drafting system, that is, a progressive drafting effect is achieved through the speed difference between multiple rollers. This system can gradually reduce the diameter of the fiber strip while maintaining the neatness of the fiber arrangement.

[0003] For example, the Chinese patent application number CN202210155862.6 discloses a single drafting zone equal-gauge double-channel ring spinning device, which obtains two equal-gauge independent single drafting zones by designing double-channel rear rollers, double-channel rear rubber rollers, double-channel upper pins, and double-channel lower pins, and is equipped with double yarn guide pressure bars and a modified condensing spinning device, so as to realize independent drafting of double rovings and online variable drafting. The two-channel rear rollers and the looper gear ring drive shaft used can borrow the positions of the middle rollers and rear rollers of the traditional condensing spinning machine, and the output of the two rovings can be changed by adjusting the drafting multiples of the two drafting channels online, so as to spin two components of color-changing yarn. It is flexible and adaptable. However, during the drafting process of the two drafting channels, the yarn is tightly clamped with the rollers, so that the lateral or longitudinal stretchability of the spinning yarn is limited. When the yarn is stretched by a slight tension fluctuation, the elastic recovery force of the straightened yarn is poor, and the yarn is prone to breakage. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a spinning drafting assembly to solve the technical problem that in the prior art, the yarn is tightly clamped with the rollers during the drafting process in the two drafting channels, so that the lateral or longitudinal extensibility of the spun yarn is limited, and when the yarn is stretched by slight tension fluctuations, the elastic recovery force of the straightened yarn is poor.

[0005] Based on the above purpose, the present invention provides a spinning drafting assembly, comprising a base frame and a lifting frame arranged on the base frame, the base frame is provided with a lower roller, the lifting frame is provided with a front roller and a rear roller, a plurality of open drafting rollers are arranged in the middle of the lifting frame, the front roller transmits power to the rear roller through the open drafting roller, the plurality of open drafting rollers are gradually spaced from the lower roller in the drafting and conveying direction of the spinning yarn, a slide rail is also installed on the lifting frame, and the spinning drafting assembly also includes:

[0006] A fixing frame, the fixing frame is adjustably mounted on the slide rail, and the front roller is mounted on the fixing frame;

[0007] Negative pressure generators, each of which is installed at the middle of a plurality of the open drafting rollers;

[0008] An overfeed yarn guide portion, which is mounted on the fixed frame and is used for overfeeding the yarn for bending and winding at the front section of the drafting of the lower roller;

[0009] A driving mechanism for driving the lifting frame to perform lifting actions;

[0010] A buffer portion is used to buffer the opening drafting roller.

[0011] Furthermore, the yarn guide outlet of the overfeed yarn guide portion faces the yarn drafting gap between the bottom roller and the open drafting roller.

[0012] Further, the overfeed yarn guiding unit comprises:

[0013] The yarn guide substrate is in a V-shaped structure, one end of the wide side is the yarn guide inlet end, and one end of the narrow side is the yarn guide outlet end. The yarn guide substrate is arranged in an inclined direction as a whole, and a yarn threading opening is opened at the upper end of the yarn guide substrate;

[0014] A fixed yarn guide wheel, wherein there are a plurality of the fixed yarn guide wheels, and the plurality of the fixed yarn guide wheels are symmetrically positioned and installed on the yarn guide base plate;

[0015] A movable yarn guide wheel, wherein a slide groove is provided on the yarn guide base plate, and the movable yarn guide wheel is slidably arranged in the slide groove through a slider;

[0016] A positioning block, the positioning block is mounted on the upper end of the yarn guide base plate;

[0017] A slide rod, one end of which is fixedly connected to the side end of the slider, and the other end of which is slidably disposed on the positioning block;

[0018] Spring 1, the spring is set on the sliding rod, one end of the spring 1 abuts against the sliding block, and the other end of the spring 1 abuts against the positioning block.

[0019] Furthermore, when the spring 1 is in a non-stressed compressed state, the movable yarn guide wheel and a plurality of the fixed yarn guide wheels are distributed in a serpentine shape on the yarn guide base plate.

[0020] Furthermore, the driving mechanism comprises:

[0021] Cylinders, the cylinders are mounted on both sides of the base frame;

[0022] A U-shaped connecting groove, the U-shaped connecting groove is detachably mounted on the side end of the lifting frame, and the lower end surface of the U-shaped connecting groove is connected to the output end of the cylinder;

[0023] A fixing block, the fixing block being arranged on a side end of the base frame;

[0024] A guide rod is fixedly arranged on the fixing block, and the U-shaped connecting groove is slidably arranged on the guide rod.

[0025] Furthermore, the buffer portion includes:

[0026] A positioning seat, the positioning seat is installed at the upper end of the lifting frame, and the middle part of the upper end of the lifting frame is a cavity structure;

[0027] A support rod, the upper end of which is mounted on the positioning seat, and the lower part of which is placed in the cavity structure of the lifting frame;

[0028] A coupling, the coupling being mounted on the roller shaft ends of the open drafting roller and the bottom roller;

[0029] A pressure head, wherein the pressure head is slidably disposed in the coupling, the lower end of the pressure head cooperates with the roller shafts of the open drafting roller and the lower roller, and the upper end of the pressure head is slidably disposed on the support rod;

[0030] Spring 2, the spring 2 is sleeved on the support rod, the upper end of the spring 2 abuts against the positioning seat, and the lower end of the spring 2 abuts against the pressure head.

[0031] Furthermore, a yarn guide pressure rod is installed on the fixed frame, and both sides of the yarn guide pressure rod can guide the introduction of the spinning yarn.

[0032] Furthermore, a plurality of the open drafting rollers correspond to the lower rollers respectively, and when the lifting frame is at the lowest point, the outer edges of the open drafting rollers and the outer edges of the lower rollers are both in contact with the spinning yarn.

[0033] Furthermore, an adjusting slot is provided at a side end of the fixing frame, and the overfeeding yarn guide portion is installed in the adjusting slot in an adjustable manner.

[0034] Furthermore, the base frame is provided with a load-bearing roller, and the lifting frame is provided with a matching groove corresponding to the load-bearing roller.

[0035] The beneficial effects of the present invention are as follows: when a spinning and drawing assembly of the present invention is used, as the drawing continues, the yarn is overfed in the overfeed yarn guide portion in a bent and wound state, and the negative pressure condition provided by the negative pressure generator in the open drawing roller causes the spinning yarn passing through the gap between the lower roller and the open drawing roller to fit respectively on the outer edges of the lower roller and the open drawing roller in a fitted manner, and the spinning and drawing operation is completed in a manner of gradually reducing the fitting spacing, and the lateral or longitudinal extensibility of the spinning yarn is enhanced, rather than the restriction method of traditional clamping and drawing; at the same time, when the yarn is stretched by a slight tension fluctuation, the spring on the corresponding side is compressed, that is, the spring causes the movable yarn guide wheel to slide in the slide groove, so that the original serpentine shapes of the movable yarn guide wheel and the fixed yarn guide wheel are released, and the spinning yarn is lengthened on the drawing path to avoid yarn breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of the present invention;

[0038] Figure 2 It is a schematic diagram of the assembly of the base frame, the lifting frame and the driving mechanism in the present invention;

[0039] Figure 3 It is a schematic diagram of the assembly of the overfeed yarn guide part, the open drafting roller and the bottom roller in the present invention;

[0040] Figure 4 It is a structural schematic diagram of the superfeed yarn guide part in the present invention;

[0041] Figure 5 It is a schematic diagram of the assembly of some structures in the present invention.

[0042] The markings in the figure are:

[0043] 1. Base frame; 2. Lifting frame; 3. Lower roller; 4. Front roller; 5. Rear roller; 6. Open drafting roller; 7. Slide rail; 8. Fixed frame; 9. Negative pressure generator; 10. Overfeed yarn guide; 11. Yarn guide base plate; 12. Yarn threading opening; 13. Fixed yarn guide wheel; 14. Movable yarn guide wheel; 15. Slide groove; 16. Sliding block; 17. Positioning block; 18. Sliding rod; 19. Spring 1; 20. Cylinder; 21. U-shaped connecting groove; 22. Fixed block; 23. Guide rod; 24. Positioning seat; 25. Support rod; 26. Coupling; 27. Pressure head; 28. Spring 2; 29. ​​Yarn guide pressure rod; 30. Adjusting groove; 31. Load-bearing roller; 32. Matching groove. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] The embodiment of the present invention provides a spinning and drafting assembly, such as Figure 1-5 As shown, it includes a base frame 1 and a lifting frame 2 arranged on the base frame 1, a bottom roller 3 is arranged on the base frame 1, a front roller 4 and a back roller 5 are arranged on the lifting frame 2, a plurality of open drafting rollers 6 are arranged in the middle of the lifting frame 2, the front roller 4 transmits power to the back roller 5 through the open drafting roller 6, and the spacing between the plurality of open drafting rollers 6 and the bottom roller 3 gradually decreases in the drafting and conveying direction of the spinning yarn, and a slide rail 7 is also installed on the lifting frame 2. The spinning drafting assembly also includes:

[0047] A fixing frame 8, the fixing frame 8 is adjustably mounted on the slide rail 7, and the front roller 4 is mounted on the fixing frame 8;

[0048] Negative pressure generators 9, which are respectively installed at the middle of a plurality of open drafting rollers 6;

[0049] An overfeed yarn guide 10, which is mounted on the fixed frame 8 and is used for overfeeding the yarn for bending and winding in the front section of the drafting of the lower roller 3;

[0050] A driving mechanism for driving the lifting frame 2 to perform lifting actions;

[0051] A buffer portion for buffering the opening drafting roller 6.

[0052] In the present embodiment, the yarn guide outlet of the overfeed yarn guide portion 10 faces the yarn drafting gap between the bottom roller 3 and the open drafting roller 6.

[0053] In this embodiment, the overfeed yarn guide section 10 comprises:

[0054] The yarn guide substrate 11 is in a V-shaped structure, with one end on the wide side being the yarn guide inlet end and one end on the narrow side being the yarn guide outlet end. The yarn guide substrate 11 is arranged in an inclined direction as a whole, and a yarn threading opening 12 is provided at the upper end of the yarn guide substrate 11;

[0055] A fixed yarn guide wheel 13, wherein there are a plurality of fixed yarn guide wheels 13, and the plurality of fixed yarn guide wheels 13 are symmetrically positioned and installed on the yarn guide base plate 11;

[0056] A movable yarn guide wheel 14, a slide groove 15 is provided on the yarn guide base plate 11, and the movable yarn guide wheel 14 is slidably arranged in the slide groove 15 through a slider 16;

[0057] A positioning block 17, the positioning block 17 is mounted on the upper end of the yarn guide base plate 11;

[0058] A slide rod 18, one end of which is fixedly connected to the side end of the slider 16, and the other end of which is slidably disposed on the positioning block 17;

[0059] Spring 19, spring 19 is sleeved on the slide rod 18, one end of spring 19 abuts against the slide block 16, and the other end of spring 19 abuts against the positioning block 17.

[0060] In this embodiment, the spring 19 is in a non-compressed state, and the movable yarn guide wheel 14 and the plurality of fixed yarn guide wheels 13 are distributed on the yarn guide base plate 11 in a serpentine shape.

[0061] In this embodiment, when in use, the yarn passes through the front roller 4, the overfeed yarn guide 10, the gap between the lower roller 3 and the open drafting roller 6, and the rear roller 5 in sequence. As the drafting continues, the yarn is overfed in the overfeed yarn guide 10 in a bent and wound state, and the negative pressure condition provided by the negative pressure generator 9 in the open drafting roller 6 makes the spinning yarn passing through the gap between the lower roller 3 and the open drafting roller 6 respectively adhere to the outer edges of the lower roller 3 and the open drafting roller 6 in a close manner, so that the spinning drafting operation is completed in a manner of gradually reducing the close spacing, and the stretchability of the spinning yarn in the transverse or longitudinal direction is enhanced;

[0062] At the same time, when the yarn is stretched by a slight tension fluctuation, the spring 19 on the corresponding side will be compressed, that is, the spring 19 causes the movable yarn guide wheel 14 to slide in the slide groove 15, so that the original serpentine shapes of the movable yarn guide wheel 14 and the fixed yarn guide wheel 13 are released, and the spinning yarn is lengthened on the drafting path.

[0063] In this embodiment, the driving mechanism includes:

[0064] Cylinder 20, the cylinder 20 is installed on both sides of the base frame 1;

[0065] A U-shaped connecting groove 21, which is detachably mounted on the side end of the lifting frame 2, and the lower end surface of the U-shaped connecting groove 21 is connected to the output end of the cylinder 20;

[0066] A fixing block 22, the fixing block 22 is arranged on a side end of the base frame 1;

[0067] The guide rod 23 is fixed on the fixing block 22 , and the U-shaped connecting groove 21 is slidably disposed on the guide rod 23 .

[0068] In this embodiment, the buffer portion includes:

[0069] The positioning seat 24 is installed at the upper end of the lifting frame 2, and the middle part of the upper end of the lifting frame 2 is a cavity structure;

[0070] A support rod 25, the upper end of the support rod 25 is mounted on the positioning seat 24, and the lower part of the support rod 25 is placed in the cavity structure of the lifting frame 2;

[0071] A coupling 26, the coupling 26 is mounted on the roller shaft ends of the open drafting roller 6 and the bottom roller 3;

[0072] A pressure head 27, the pressure head 27 is slidably disposed in the coupling 26, the lower end of the pressure head 27 is matched with the roller shafts of the open drafting roller 6 and the lower roller 3, and the upper end of the pressure head 27 is slidably disposed on the support rod 25;

[0073] The second spring 28 is sleeved on the support rod 25 , the upper end of the second spring 28 abuts against the positioning seat 24 , and the lower end of the second spring 28 abuts against the pressure head 27 .

[0074] In this embodiment, a yarn guide pressure rod 29 is installed on the fixed frame 8, and both sides of the yarn guide pressure rod 29 can guide the introduction of the spinning yarn.

[0075] In this embodiment, a plurality of open drafting rollers 6 correspond to the lower rollers 3 respectively. When the lifting frame 2 is at the lowest point, the outer edges of the open drafting rollers 6 and the outer edges of the lower rollers 3 are both in contact with the spinning yarn.

[0076] In this embodiment, if Figure 3 As shown, an adjusting slot 30 is provided at the side end of the fixing frame 8, and the overfeeding yarn guide portion 10 is installed in the adjusting slot 30 so that the angle thereof can be adjusted.

[0077] In this embodiment, if Figure 2 As shown, a load-bearing roller 31 is provided on the base frame 1 , and a matching groove 32 corresponding to the load-bearing roller 31 is provided on the lifting frame 2 .

[0078] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0079] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A spinning drafting assembly, comprising a base frame (1) and a lifting frame (2) arranged on the base frame (1), wherein the base frame (1) is provided with a lower roller (3), and the lifting frame (2) is provided with a front roller (4) and a rear roller (5), characterized in that: A plurality of open drafting rollers (6) are provided in the middle of the lifting frame (2), the front roller (4) transmits power to the rear roller (5) through the open drafting rollers (6), and the spacing between the plurality of open drafting rollers (6) and the bottom roller (3) gradually decreases in the drafting and conveying direction of the spinning yarn. A slide rail (7) is also installed on the lifting frame (2), and the spinning drafting assembly further comprises: A fixed frame (8), the fixed frame (8) is adjustably mounted on the slide rail (7), and the front roller (4) is mounted on the fixed frame (8); A negative pressure generator (9), wherein the negative pressure generator (9) is respectively installed in the middle of a plurality of the open drafting rollers (6); An overfeed yarn guide (10), the overfeed yarn guide (10) being mounted on the fixed frame (8) and used for overfeeding the yarn for bending and winding at the front stretching section of the lower roller (3); A driving mechanism for driving the lifting frame (2) to perform a lifting action; A buffer portion is used to buffer the opening drafting roller (6).

2. A spinning and drafting assembly according to claim 1, characterized in that: The yarn guide outlet of the overfeed yarn guide portion (10) faces the yarn drafting gap between the lower roller (3) and the open drafting roller (6).

3. A spinning and drafting assembly according to claim 2, characterized in that: The overfeed yarn guiding section (10) comprises: A yarn guide substrate (11), the yarn guide substrate (11) is in a V-shaped structure, one end of the wide side is a yarn guide inlet end, and one end of the narrow side is a yarn guide outlet end, the yarn guide substrate (11) is arranged in an inclined direction as a whole, and a yarn threading opening (12) is opened at the upper end of the yarn guide substrate (11); A fixed yarn guide wheel (13), wherein there are a plurality of the fixed yarn guide wheels (13), and the plurality of the fixed yarn guide wheels (13) are symmetrically positioned and installed on the yarn guide base plate (11); A movable yarn guide wheel (14), wherein a slide groove (15) is provided on the yarn guide base plate (11), and the movable yarn guide wheel (14) is slidably arranged in the slide groove (15) via a slider (16); A positioning block (17), the positioning block (17) being mounted on the upper end of the yarn guide base plate (11); A slide rod (18), one end of which is fixedly connected to the side end of the slider (16), and the other end of which is slidably disposed on the positioning block (17); Spring 1 (19), wherein the spring 1 (19) is sleeved on the slide bar (18), one end of the spring 1 (19) abuts against the slide block (16), and the other end of the spring 1 (19) abuts against the positioning block (17).

4. A spinning and drafting assembly according to claim 3, characterized in that: When the spring 1 (19) is in a non-compressed state, the movable yarn guide wheel (14) and a plurality of fixed yarn guide wheels (13) are distributed in a serpentine shape on the yarn guide base plate (11).

5. A spinning and drawing assembly according to claim 1, characterized in that: The driving mechanism comprises: Cylinders (20), the cylinders (20) being mounted on both sides of the base frame (1); A U-shaped connecting groove (21), wherein the U-shaped connecting groove (21) is detachably mounted on a side end of the lifting frame (2), and the lower end surface of the U-shaped connecting groove (21) is connected to an output end of the cylinder (20); A fixing block (22), the fixing block (22) being arranged on a side end of the base frame (1); A guide rod (23), wherein the guide rod (23) is fixedly arranged on the fixed block (22), and the U-shaped connecting groove (21) is slidably arranged on the guide rod (23).

6. A spinning and drawing assembly according to claim 1, characterized in that: The buffer portion comprises: A positioning seat (24), the positioning seat (24) being mounted on the upper end of the lifting frame (2), and the middle portion of the upper end of the lifting frame (2) being a cavity structure; A support rod (25), the upper end of the support rod (25) is mounted on the positioning seat (24), and the lower part of the support rod (25) is placed in the cavity structure of the lifting frame (2); A coupling (26), wherein the coupling (26) is mounted on the roller shaft ends of the open drafting roller (6) and the lower roller (3); A pressure head (27), wherein the pressure head (27) is slidably disposed in the coupling (26), the lower end of the pressure head (27) cooperates with the roller shafts of the open drafting roller (6) and the lower roller (3), and the upper end of the pressure head (27) is slidably disposed on the support rod (25); Spring 2 (28), wherein the spring 2 (28) is sleeved on the support rod (25), the upper end of the spring 2 (28) abuts against the positioning seat (24), and the lower end of the spring 2 (28) abuts against the pressure head (27).

7. A spinning and drafting assembly according to claim 1, characterized in that: A yarn guide pressure rod (29) is installed on the fixed frame (8), and both sides of the yarn guide pressure rod (29) can guide the introduction of the spinning yarn.

8. A spinning and drafting assembly according to claim 1, characterized in that: A plurality of open drafting rollers (6) respectively correspond to the lower rollers (3); when the lifting frame (2) is at the lowest point, the outer edges of the open drafting rollers (6) and the outer edges of the lower rollers (3) are both in contact with the spinning yarn.

9. A spinning and drawing assembly according to claim 1, characterized in that: An adjustment slot (30) is provided at the side end of the fixing frame (8), and the overfeeding yarn guide portion (10) is installed in the adjustment slot (30) in an angle-adjustable manner.

10. A spinning and drafting assembly according to claim 1, characterized in that: The base frame (1) is provided with a load-bearing roller (31), and the lifting frame (2) is provided with a matching groove (32) corresponding to the load-bearing roller (31).

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