A drawing frame drafting device

Abstract

This utility model discloses a drafting device for a drawing frame, relating to the field of drawing frame technology. It includes an L-shaped limiting seat, on one side of which are arranged several sets of drafting components. Each drafting component includes an upper drafting roller and a lower drafting roller disposed on one side of the L-shaped limiting seat, arranged from top to bottom. The lower drafting roller is driven by a motor. The drawing frame drafting device also includes a roller cleaning component for cleaning waste materials from the upper and lower drafting rollers. This drawing frame drafting device, through the rotation of the lower drafting roller driving the linked roller cleaning component to operate automatically, achieves efficient and synchronous removal of cotton lint adhering to the surfaces of the upper and lower drafting rollers. This linked design not only ensures comprehensive scraping of cotton lint from all parts of the upper and lower drafting rollers during continuous operation but also improves the uniformity and thoroughness of cleaning, effectively preventing the accumulation of cotton lint from affecting the drafting quality.

Description

Technical Field

[0001] This utility model relates to the field of drawing frame technology, specifically to a drawing frame drafting device. Background Technology

[0002] As a key piece of equipment in the spinning process, the drawing frame's core function is to combine and draft the cotton sliver to improve fiber straightness and parallelism, reduce weight unevenness, and thus obtain a uniform, high-quality sliver. The drafting unit is the core component that achieves this function, typically consisting of one or more pairs of drafting rollers with varying rotational speeds. The cotton sliver passes between these rollers and is gradually thinned and lengthened by precisely controlled traction force; the process's effect directly determines the quality of the final yarn.

[0003] However, in actual production, after prolonged continuous operation, the surface of drafting rollers, especially the lower drafting roller, is prone to the adhesion and accumulation of cotton lint generated by fiber friction. This lint alters the effective contact and frictional boundary between the drafting roller and the sliver, not only interfering with the normal drafting process and leading to deterioration in sliver evenness, but also potentially causing fiber entanglement on the roller, resulting in equipment downtime and requiring frequent manual cleaning and maintenance, severely impacting production efficiency and product quality stability. Current technology lacks effective means for efficient and automatic cleaning of drafting rollers during equipment operation, which is a problem urgently needing to be solved in this field. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a drafting device for a drawing frame, which solves the problem that cotton lint easily adheres to the surface of the drafting rollers after long-term operation, leading to a decline in drafting quality, the need for frequent machine shutdowns for cleaning, and the impact on production efficiency and product stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drafting device for a drawing frame, comprising an L-shaped limiting seat, wherein a plurality of drafting components are provided on one side of the L-shaped limiting seat, the drafting components comprising an upper drafting roller and a lower drafting roller disposed on one side of the L-shaped limiting seat, the upper drafting roller and the lower drafting roller being arranged from top to bottom, the lower drafting roller being driven by a motor, and the drawing frame drafting device further comprising a roller cleaning component for cleaning waste on the upper drafting roller and the lower drafting roller.

[0006] The roller cleaning assembly includes a turntable rotatably mounted on the upper part of an L-shaped limiting seat. An eccentric shaft is provided on the upper part of the turntable near its edge. A grooved plate is slidably mounted on the eccentric shaft. A lower scraper is connected to the upper part of one side of the grooved plate. The lower scraper is attached to the bottom of the lower drawing roller. A lower limiting rod is provided on one side of the lower scraper. The other end of the lower limiting rod is horizontally connected to an upper limiting rod via a vertically mounted telescopic rod. The other end of the upper limiting rod is connected to an upper scraper. The upper scraper is located directly above the upper drawing roller. The roller cleaning assembly also includes a transmission assembly for driving the turntable to rotate.

[0007] Preferably, both the lower scraper and the upper scraper are arc-shaped, and their centers are located on the axes of the lower stretching roller and the upper stretching roller, respectively.

[0008] Preferably, the telescopic rod includes a hollow rod vertically connected to the end of the lower limit rod away from the lower scraper, a movable rod is longitudinally slidably inserted inside the hollow rod, the upper end of the movable rod is connected to the upper limit rod, and the movable rod and the hollow rod are fastened together by fastening bolts.

[0009] Preferably, the transmission assembly includes a ring gear disposed at the upper edge of the turntable, a transmission groove disposed at the outer edge of the lower drafting roller near the L-shaped limit seat, and a transmission gear rotatably disposed on one side of the L-shaped limit seat. The transmission gear meshes with the ring gear on the turntable, and a transmission wheel is connected to one side of the transmission gear. The transmission wheel is connected to the transmission groove on the lower drafting roller via a belt drive.

[0010] Preferably, both ends of the grooved plate are provided with protrusions, and a guide shaft slides through one side of the protrusion laterally. One end of the guide shaft is connected to one side of the L-shaped limiting seat.

[0011] Preferably, one side of the L-shaped limiting seat is provided with a limiting groove corresponding to the upper drawing roller, a screw is rotatably arranged in the limiting groove, and a movable seat is screwed to the outside of the screw through a thread. One end of the upper drawing roller is rotatably arranged on one side of the movable seat, and a servo motor for driving the screw to rotate is installed on the top of the L-shaped limiting seat.

[0012] This utility model provides a drafting device for a drawing frame, which has the following advantages compared with the prior art: This drawing frame drafting unit automatically operates a linked roller cleaning assembly driven by the rotation of the lower drafting roller, achieving efficient and synchronous removal of cotton lint adhering to the surfaces of both the upper and lower drafting rollers. This linked design not only ensures comprehensive scraping of cotton lint from all parts of the upper and lower drafting rollers during continuous operation but also improves the uniformity and thoroughness of cleaning, effectively preventing the accumulation of cotton lint from affecting drafting quality, thereby guaranteeing stable equipment operation and reliable product quality. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the roller cleaning assembly of this utility model; Figure 3 This utility model Figure 1 A magnified view of the structure at point A in the middle.

[0014] In the diagram: 1. L-shaped limit seat; 11. Limit groove; 12. Screw; 13. Moving seat; 14. Servo motor; 2. Upper draft roller; 3. Lower draft roller; 4. Roller cleaning assembly; 41. Turntable; 42. Eccentric shaft; 43. Grooved plate; 431. Protrusion; 432. Guide shaft; 44. Lower scraper; 45. Lower limit rod; 46. Telescopic rod; 461. Hollow rod; 462. Moving rod; 463. Fastening bolt; 47. Upper limit rod; 48. Upper scraper; 49. Transmission assembly; 491. Transmission groove; 492. Ring gear; 493. Transmission gear; 494. Transmission wheel; 495. Belt. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1 In the embodiments of this utility model, please refer to Figure 1 This utility model provides a technical solution: a drawing frame drafting device, including an L-shaped limiting seat 1, with a plurality of drafting components arranged on one side of the L-shaped limiting seat 1. The drafting components include an upper drafting roller 2 and a lower drafting roller 3 arranged on one side of the L-shaped limiting seat 1, the upper drafting roller 2 and the lower drafting roller 3 arranged from top to bottom, the lower drafting roller 3 being driven by a motor. The drawing frame drafting device also includes a roller cleaning component 4 for cleaning waste on the upper drafting roller 2 and the lower drafting roller 3.

[0017] Please see Figures 1-2In this embodiment of the present invention, the roller cleaning assembly 4 includes a turntable 41 rotatably mounted on the upper part of the L-shaped limiting seat 1. An eccentric shaft 42 is provided near the edge of the upper part of the turntable 41. A grooved plate 43 is slidably sleeved on the eccentric shaft 42. A lower scraper 44 is connected to the upper part of one side of the grooved plate 43. The lower scraper 44 is attached to the bottom of the lower drawing roller 3. A lower limiting rod 45 is provided on one side of the lower scraper 44. The other end of the lower limiting rod 45 is horizontally connected to an upper limiting rod 47 through a vertically arranged telescopic rod 46. The other end of the upper limiting rod 47 is connected to an upper scraper 48. The upper scraper 48 is located directly above the upper drawing roller 2. The roller cleaning assembly 4 also includes a transmission assembly 49 for driving the turntable 41 to rotate.

[0018] Please see Figures 1-2 In this embodiment of the present invention, both the lower scraper 44 and the upper scraper 48 are arc-shaped, and their centers are located on the axes of the lower drawing roller 3 and the upper drawing roller 2, respectively. This allows the upper scraper 48 to adhere to the upper drawing roller 2 when it moves downward, and the lower scraper 44 to adhere to the lower drawing roller 3, thereby enabling the cleaning of waste on the upper drawing roller 2 and the lower drawing roller 3.

[0019] Please see Figures 1-2 In this embodiment of the utility model, the telescopic rod 46 includes a hollow rod 461 vertically connected to the end of the lower limit rod 45 away from the lower scraper 44. A movable rod 462 is longitudinally slidably inserted inside the hollow rod 461. The upper end of the movable rod 462 is connected to the upper limit rod 47, and the movable rod 462 and the hollow rod 461 are fastened together by a fastening bolt 463. When the upper stretching roller 2 is adjusted, the position of the upper scraper 48 can be adjusted by adjusting the fastening bolt 463 so that it can fit against the upper stretching roller 2.

[0020] Please see Figures 1-2 In this embodiment of the present invention, the transmission component 49 includes a ring gear 492 disposed at the upper edge of the turntable 41, a transmission groove 491 disposed at the outer edge of the lower drawing roller 3 near the L-shaped limiting seat 1, and a transmission gear 493 rotatably disposed on one side of the L-shaped limiting seat 1. The transmission gear 493 meshes with the ring gear 492 on the turntable 41, and a transmission wheel 494 is connected to one side of the transmission gear 493. The transmission wheel 494 is connected to the transmission groove 491 on the lower drawing roller 3 via a belt 495.

[0021] Please see Figures 1-2 In this embodiment of the utility model, both ends of the grooved plate 43 are provided with protrusions 431. A guide shaft 432 slides horizontally through one side of the protrusion 431. One end of the guide shaft 432 is connected to one side of the L-shaped limiting seat 1. When the grooved plate 43 moves, the protrusions 431 on the grooved plate 43 will slide on the guide shaft 432, which plays a role in limiting and guiding the movement of the grooved plate 43.

[0022] Please see Figure 1 and Figure 3 In this embodiment of the utility model, a limiting groove 11 corresponding to the upper drawing roller 2 is provided on one side of the L-shaped limiting seat 1. A screw 12 is rotatably provided in the limiting groove 11. A movable seat 13 is screwed to the outside of the screw 12 by a thread. One end of the upper drawing roller 2 is rotatably provided on one side of the movable seat 13. A servo motor 14 for driving the screw 12 to rotate is installed on the top of the L-shaped limiting seat 1.

[0023] Working principle: The cotton sliver passes between the upper drafting roller 2 and the lower drafting roller 3. Then, the servo motor 14 drives the screw 12 to rotate. The screw 12 drives the moving seat 13 to move. The moving seat 13 drives the upper drafting roller 2 to move downward and press the cotton sliver against the lower drafting roller 3. Then, the motor drives the lower drafting roller 3 to rotate, and the lower drafting roller 3 will stretch the cotton sliver. This technical solution is existing technology and will not be described in detail. When the upper draft roller 2 presses the sliver against the lower draft roller 3, loosen the fastening bolt 463 and slide the moving rod 462 downwards so that the upper scraper 48 fits against the upper part of the upper draft roller 2. Then tighten the fastening bolt 463. When the lower draft roller 3 rotates, the lower draft roller 3 will cause the belt 495 to drive the transmission wheel 494 to rotate. The transmission wheel 494 drives the transmission gear 493 to rotate. Since the transmission gear 493 meshes with the ring gear 492 on the turntable 41, the rotation of the transmission gear 493 will drive the turntable 41 to rotate. The turntable 41 causes the eccentric shaft 42 to move eccentrically. The eccentric shaft 42 drives the grooved plate 43 to move back and forth repeatedly, which in turn drives the lower scraper 44 to scrape back and forth at the bottom of the lower drafting roller 3, removing the cotton lint attached to the lower drafting roller 3. When the lower scraper 44 moves, it causes the lower limit rod 45 to move back and forth, which in turn drives the upper scraper 48 to move back and forth. The upper scraper 48 then scrapes the cotton lint attached to the upper drafting roller 2. Therefore, both the upper drafting roller 2 and the lower drafting roller 3 are rotating, so the cotton lint attached to each position on the upper drafting roller 2 and the lower drafting roller 3 can be scraped off.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A drafting device for a drawing frame, comprising an L-shaped limiting seat (1), wherein one side of the L-shaped limiting seat (1) is provided with a plurality of drafting components, characterized in that: The drafting assembly includes an upper drafting roller (2) and a lower drafting roller (3) disposed on one side of the L-shaped limiting seat (1). The upper drafting roller (2) and the lower drafting roller (3) are arranged from top to bottom. The lower drafting roller (3) is driven by a motor. The drafting device of the drawing frame also includes a roller cleaning assembly (4) for cleaning waste on the upper drafting roller (2) and the lower drafting roller (3). The roller cleaning assembly (4) includes a turntable (41) rotatably mounted on the upper part of the L-shaped limiting seat (1). An eccentric shaft (42) is provided on the upper part of the turntable (41) near the edge. A grooved plate (43) is slidably mounted on the eccentric shaft (42). A lower scraper (44) is connected to the upper part of one side of the grooved plate (43). The lower scraper (44) is attached to the bottom of the lower drawing roller (3). A lower limiting rod (45) is provided on one side of the lower scraper (44). The other end of the lower limiting rod (45) is horizontally connected to an upper limiting rod (47) through a vertically mounted telescopic rod (46). The other end of the upper limiting rod (47) is connected to an upper scraper (48). The upper scraper (48) is located directly above the upper drawing roller (2). The roller cleaning assembly (4) also includes a transmission assembly (49) for driving the turntable (41) to rotate.

2. The drafting device for a drawing frame according to claim 1, characterized in that: Both the lower scraper (44) and the upper scraper (48) are arc-shaped, and their centers are located on the axes of the lower stretching roller (3) and the upper stretching roller (2), respectively.

3. The drafting device for a drawing frame according to claim 1, characterized in that: The telescopic rod (46) includes a hollow rod (461) vertically connected to the end of the lower limit rod (45) away from the lower scraper (44). A movable rod (462) is longitudinally slidably inserted inside the hollow rod (461). The upper end of the movable rod (462) is connected to the upper limit rod (47), and the movable rod (462) and the hollow rod (461) are fastened together by a fastening bolt (463).

4. The drafting device for a drawing frame according to claim 1, characterized in that: The transmission assembly (49) includes a ring gear (492) located at the upper edge of the turntable (41), a transmission groove (491) located near the L-shaped limit seat (1) on the outer edge of the lower stretching roller (3), and a transmission gear (493) rotatably located on one side of the L-shaped limit seat (1). The transmission gear (493) meshes with the ring gear (492) on the turntable (41), and a transmission wheel (494) is connected to one side of the transmission gear (493). The transmission wheel (494) is connected to the transmission groove (491) on the lower stretching roller (3) via a belt (495).

5. The drafting device for a drawing frame according to claim 1, characterized in that: Both ends of the grooved plate (43) are provided with protrusions (431), and a guide shaft (432) slides horizontally through one side of the protrusion (431). One end of the guide shaft (432) is connected to one side of the L-shaped limiting seat (1).

6. The drafting device for a drawing frame according to claim 1, characterized in that: The L-shaped limiting seat (1) has a limiting groove (11) corresponding to the upper drawing roller (2) on one side. A screw (12) is rotatably installed in the limiting groove (11). A movable seat (13) is screwed to the outside of the screw (12) by a thread. One end of the upper drawing roller (2) is rotatably installed on one side of the movable seat (13). A servo motor (14) for driving the screw (12) to rotate is installed on the top of the L-shaped limiting seat (1).

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