Drafting device with middle and rear rollers

Abstract

The utility model relates to the field of drafting devices, in particular to a drafting device with a middle roller and a rear roller, which comprises a first yarn roller, a front roller, the middle roller, the rear roller, a yarn feeding roller device and yarn, the yarn feeding roller device is mounted on the right side of the first yarn roller, the front roller is mounted on the right side of the yarn feeding roller device, and the middle roller is mounted on the right side of the front roller. The yarn is installed among the first yarn roller, the front roller, the middle roller, the rear roller and the yarn feeding roller device, the first yarn roller, the second yarn roller, the first godet, the second godet and the yarn feeding roller device form a yarn traction mechanism, and the yarn can smoothly enter the front roller, the middle roller and the rear roller. And meanwhile, the total drafting capacity can be greatly enhanced by increasing the draft multiple of the rear area, and super-large drafting application of cotton sliver direct spinning can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of drafting devices, in particular to a drafting device with middle and rear rollers. Background Art

[0002] The drafting mechanism of the ring spinning frame is to evenly draw the fed roving or sliver into a finished yarn with a certain number of features. Therefore, the operating stability of the drafting device of the ring spinning frame directly affects the quality index of the finished yarn. The drafting mechanism of the traditional ring spinning frame mostly adopts a three-roller double-apron drafting structure, which includes a front roller pair consisting of a front roller and a front rubber roller, a rear roller pair consisting of a rear roller and a rear rubber roller; and a middle roller pair consisting of a middle roller and a middle upper roller. The roller is covered with a lower apron, and the middle upper roller is equipped with an upper pin and covered with an upper apron. The working surfaces of the upper and lower aprons are in direct contact with the yarn strip, thus forming an apron jaw, which can effectively control the movement of the fiber and enable the fiber held by the front roller jaw to be smoothly extracted, and has a large drafting capacity. However, in the apron jaw composed of the upper and lower aprons, the movement power of the upper apron comes from the lower apron in friction contact with it, and the lower apron comes from the middle roller that is tightly pressed against the middle upper roller. This method of driving the upper and lower aprons by the friction force generated by the contact pressure of the middle roller and the middle upper roller on a contact line is often very limited in its working stability. In addition, the difference in the bending stiffness of the upper and lower aprons will also cause the friction resistance between the upper and lower aprons and the upper and lower pins to change. Therefore, in the actual operation process, it is very easy for the aprons to be uneven in speed, such as beating and slipping, which makes the aprons unstable. The instability of the apron operation means that the drafting multiple of the apron drafting jaws is changing randomly, which directly affects the stability of the apron control function and the yarn dryness. This is particularly prominent for high-multiple drafting mechanisms. Although increasing the pressure of the middle upper roller on the upper apron can reduce the uneven speed of the apron, excessive pressure not only increases the damage to the apron, even causes rolling damage and reduces the service life of the apron, but also increases the friction resistance of the middle upper roller and the middle roller bearing, and the uneven speed rate of the apron is worsened. Therefore, those skilled in the art provide a drafting device with a middle rear roller to solve the problems raised in the above background technology. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides a drafting device with middle and rear rollers, including a No. 1 yarn roller, a front roller, a middle roller, a rear roller, a yarn feeding roller device and yarn, the yarn feeding roller device is installed on the right side of the No. 1 yarn roller, the front roller is installed on the right side of the yarn feeding roller device, the middle roller is installed on the right side of the front roller, the rear roller is installed on the right side of the middle roller, and the yarn is installed between the No. 1 yarn roller, the front roller, the middle roller, the rear roller and the yarn feeding roller device.

[0004] Preferably: a No. 1 guide roller is installed on the lower side of the front roller;

[0005] Preferably: a No. 3 leather guide device is installed on the left side of the middle roller, and a No. 3 leather ring is installed on the No. 3 leather guide device;

[0006] Preferably: a No. 1 leather roller is installed at the lower side of the middle roller, a No. 1 leather guide device is installed at the left side of the No. 1 leather roller, and a No. 1 leather ring is installed on the No. 1 leather guide device;

[0007] Preferably: a No. 4 leather guide device is installed on the left side of the rear roller, and a No. 4 leather ring is installed on the No. 4 leather guide device;

[0008] Preferably: a No. 2 leather roller is installed at the lower side of the rear roller, a No. 2 leather guide device is installed at the left side of the No. 2 leather roller, and a No. 2 leather ring is installed on the No. 2 leather guide device;

[0009] Preferably: a second yarn roller is installed on the right side of the rear roller;

[0010] Preferably, a No. 2 guide roller is installed at the lower side of the No. 2 yarn roller.

[0011] Technical effects and advantages of the utility model:

[0012] 1. The No. 1 yarn roller, No. 2 yarn roller, No. 1 guide roller, No. 2 guide roller and yarn feeding roller device constitute the yarn pulling mechanism, which can realize the smooth entry of yarn into the front roller, middle roller and back roller. At the same time, the total drafting capacity can be greatly enhanced by increasing the drafting multiple of the back zone, and the ultra-large drafting application of cotton sliver direct spinning can be realized;

[0013] 2. Change the draft of the feeding roller device, and the No. 3 skin guide device on the left side of the middle roller presses down the yarn to add the surrounding arc between the yarn and the rear roller without changing the feeding condition, so that the speed change point of the No. 2 wire guide roller can be further moved forward and concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a drafting device with middle and rear rollers provided in an embodiment of the present application;

[0015] Figure 2 It is a front structural schematic diagram of a drafting device with middle and rear rollers provided in an embodiment of the present application;

[0016] Figure 3 It is a schematic diagram of a partial explosion structure of a drafting device with a middle and rear roller provided in an embodiment of the present application;

[0017] Figure 4 It is a left-view structural schematic diagram of a drafting device with a middle and rear roller provided in an embodiment of the present application.

[0018] In the figure: 1. yarn roller No. 1; 2. front roller; 3. yarn roller No. 2; 4. guide roller No. 1; 5. leather roller No. 1; 6. leather roller No. 2; 7. guide roller No. 2; 8. middle roller; 9. back roller; 10. yarn feeding roller device; 11. leather guide device No. 1; 12. leather guide device No. 2; 13. leather guide device No. 3; 14. leather guide device No. 4; 15. leather ring No. 1; 16. leather ring No. 2; 17. leather ring No. 3; 18. leather ring No. 4; 19. yarn. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes. Example

[0020] See also Figure 1 to Figure 4 In this embodiment, a drafting device with middle and rear rollers is provided, comprising a No. 1 yarn roller 1, a front roller 2, a middle roller 8, a rear roller 9, a yarn feeding roller device 10 and yarn 19, the yarn feeding roller device 10 is installed on the right side of the No. 1 yarn roller 1, the front roller 2 is installed on the right side of the yarn feeding roller device 10, the middle roller 8 is installed on the right side of the front roller 2, the rear roller 9 is installed on the right side of the middle roller 8, and the yarn 19 is installed between the No. 1 yarn roller 1, the front roller 2, the middle roller 8, the rear roller 9 and the yarn feeding roller device 10;

[0021] Specifically, a No. 1 guide roller 4 is installed on the lower side of the front roller 2;

[0022] A No. 3 leather guide device 13 is installed on the left side of the middle roller 8, and a No. 3 leather ring 17 is installed on the No. 3 leather guide device 13;

[0023] A No. 1 leather roller 5 is installed at the lower side of the middle roller 8, a No. 1 leather guide device 11 is installed at the left side of the No. 1 leather roller 5, and a No. 1 leather ring 15 is installed on the No. 1 leather guide device 11;

[0024] A fourth leather guide device 14 is installed on the left side of the rear roller 9, and a fourth leather ring 18 is installed on the fourth leather guide device 14;

[0025] A No. 2 leather roller 6 is installed at the lower side of the rear roller 9, a No. 2 leather guide device 12 is installed at the left side of the No. 2 leather roller 6, and a No. 2 leather ring 16 is installed on the No. 2 leather guide device 12;

[0026] The second yarn roller 3 is installed on the right side of the rear roller 9;

[0027] A second guide roller 7 is installed at the lower side of the second yarn roller 3.

[0028] The working principle of the utility model is:

[0029] When using a drafting device with middle and rear rollers, No. 1 yarn roller 1, No. 2 yarn roller 3, No. 1 guide roller 4, No. 2 guide roller 7 and yarn feeding roller device 10 form a yarn pulling mechanism, which can realize the smooth entry of yarn into front roller 2, middle roller 8 and rear roller 9. At the same time, the total drafting capacity can be greatly enhanced by increasing the drafting multiple of the rear area, and the ultra-large drafting application of yarn and cotton spinning can be realized. The drafting of the feeding roller device 10 is changed, and the No. 3 skin guide device on the left side of the middle roller 8 presses down the yarn 19 to add the encircling arc of the yarn 19 and the rear roller 9 without changing the feeding condition, so that the speed change point of the No. 2 guide roller 7 can be further moved forward and concentrated.

[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A drafting device with middle and rear rollers, characterized in that: The invention comprises a yarn roller (1), a front roller (2), a middle roller (8), a rear roller (9), a yarn feeding roller device (10) and yarn (19). The yarn feeding roller device (10) is installed on the right side of the yarn roller (1), the front roller (2) is installed on the right side of the yarn feeding roller device (10), the middle roller (8) is installed on the right side of the front roller (2), the rear roller (9) is installed on the right side of the middle roller (8), and the yarn (19) is installed between the yarn roller (1), the front roller (2), the middle roller (8), the rear roller (9) and the yarn feeding roller device (10).

2. A drafting device with middle and rear rollers according to claim 1, characterized in that: A No. 1 wire guide roller (4) is installed on the lower side of the front roller (2).

3. A drafting device with middle and rear rollers according to claim 1, characterized in that: A No. 3 leather guide device (13) is installed on the left side of the middle roller (8), and a No. 3 leather ring (17) is installed on the No. 3 leather guide device (13).

4. A drafting device with middle and rear rollers according to claim 3, characterized in that: A No. 1 leather roller (5) is installed on the lower side of the middle roller (8), a No. 1 leather guide device (11) is installed on the left side of the No. 1 leather roller (5), and a No. 1 leather ring (15) is installed on the No. 1 leather guide device (11).

5. The drafting device with middle and rear rollers according to claim 1, characterized in that: A No. 4 leather guide device (14) is installed on the left side of the rear roller (9), and a No. 4 leather ring (18) is installed on the No. 4 leather guide device (14).

6. A drafting device with middle and rear rollers according to claim 5, characterized in that: A No. 2 leather roller (6) is installed on the lower side of the rear roller (9), a No. 2 leather guide device (12) is installed on the left side of the No. 2 leather roller (6), and a No. 2 leather ring (16) is installed on the No. 2 leather guide device (12).

7. A drafting device with middle and rear rollers according to claim 6, characterized in that: A second yarn roller (3) is installed on the right side of the rear roller (9).

8. A drafting device with middle and rear rollers according to claim 7, characterized in that: A second yarn guide roller (7) is installed on the lower side of the second yarn roller (3).

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