Device and method for automatically adjusting noil gauge of combing machine

By introducing an automatic adjustment device in the combing machine, the precise adjustment of the cotton pad separation is achieved by using the motor drive gear and the sector gear, the problems of low accuracy and labor-intensive manual adjustment in the prior art are solved, and efficiency and safety are improved.

CN119265760APending Publication Date: 2025-01-07ZHONGYUAN ENGINEERING COLLEGE
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Patent Information

Application Number
CN202411577104.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-01-07

AI Technical Summary

Technical Problem

The cotton pad separation adjustment of the existing combing machine requires manual operation, which leads to low accuracy, time-consuming and labor-intensive, and is prone to safety accidents.

Method used

An automatic adjustment device including an adjustment motor, an adjustment gear, a sliding mechanism and a reciprocating assembly is designed. The precise adjustment of the plier pendulum shaft is achieved through the motor drive gear and the sector gear, which simplifies the adjustment process of the cotton pad separation distance.

Benefits of technology

It improves the adjustment accuracy and efficiency of cotton pad separation, reduces manpower investment, reduces safety risks, and extends the service life of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an automatic adjusting device for a noil gauge of a combing machine in the field of textile machinery, and the automatic adjusting device comprises an adjusting assembly which comprises an adjusting motor and an adjusting gear, the adjusting gear is fixedly arranged on an output shaft of the adjusting motor, and the adjusting motor is fixedly arranged on a sliding mechanism; the nipper assembly comprises a nipper swing shaft and a sector gear piece, the outer end of the nipper swing shaft is fixedly connected with the nipper, and the sector gear piece is fixedly arranged on the nipper swing shaft; the reciprocating assembly is connected with the inner end of the nipper pendulum shaft in a clamped mode, the reciprocating assembly is fixedly connected with a main driving mechanism of the combing machine to achieve reciprocating rotation of the nipper pendulum shaft, the reciprocating assembly is also fixedly arranged on the sliding mechanism, and combination and separation of the reciprocating assembly and the nipper pendulum shaft are achieved through the sliding mechanism; the invention further discloses an adjusting method. The noil gauge adjusting device has the beneficial effects that the noil gauge is adjusted by arranging the adjusting assembly and meshing the adjusting gear of the adjusting assembly with the sector gear piece of the nipper swing shaft, and compared with manual adjustment, the noil gauge adjusting device is more accurate and higher in efficiency.
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Description

Technical Field

[0001] The invention relates to the field of textile machinery, and in particular to a combing machine noil gauge automatic adjustment device and method. Background Art

[0002] As the main spinning processing equipment, cotton combing machine plays an important role in improving the grade and added value of textile products. The noil gauge of the combing machine is an important process parameter in the combing process of textile products. It has a decisive influence on the spinning quality and production cost. The increase of the noil gauge will improve the quality of semi-finished products and finished yarns, but it is easy to cause an increase in noil, thus reducing the profit of the enterprise. When the nipper is in the frontmost position, the distance from the lower nipper lip to the surface of the rear detachment roller is called the noil gauge. The noil rate can be modified by modifying the noil gauge "d". The optional range of the noil gauge is 6mm~15mm. The noil gauge "d" is as follows. Figure 5 shown.

[0003] In the prior art, the forward and backward reciprocating motion of the lower nipper is mainly achieved by the forward and reverse rotation of the nipper swing shaft fixed together with the nipper four-bar linkage and the rear swing arm. The rotation of the nipper swing shaft is completed by the crank slide mechanism of the combing machine. During normal combing production, the crank slide mechanism drives the swing shaft positioning sleeve to swing forward and backward through the pin key, and the swing shaft positioning sleeve and the nipper swing shaft are fixed together through 4 screws 1, so that the nipper mechanism swings back and forth. If it is necessary to adjust the cotton drop gauge, the 4 screws 1 on the swing shaft positioning sleeve must be loosened so that it rotates relative to the nipper swing shaft, and then the cotton drop gauge is adjusted to the required position according to the process requirements, and then the 4 screws are tightened.

[0004] Whether the "gear-connecting rod" drive mechanism or the new motor-driven combing machine is used, the cotton drop gauge is adjusted manually using an Allen wrench tool. The existing adjustment structure is as follows Figure 6 As shown, the specific method and steps are as follows: Loosen the four screws 1. If the cotton drop gauge is from small to large, loosen the screw 3, screw in the screw 2 until the engraved line on the positioning block 4 is aligned with the required scale on the positioning plate 5; if the cotton drop gauge is from large to small, loosen the screw 2 until the engraved line on the positioning block 4 is aligned with the required scale on the positioning plate 5; tighten the four screws 1 with a torque wrench.

[0005] Due to the precision and complexity of the combing machine mechanism movement, the cotton drop gauge adjustment range is only 10mm. If it is adjusted manually by the naked eye, not only the accuracy of the cotton drop gauge cannot be guaranteed, but it is also time-consuming and labor-intensive, wasting a lot of process adjustment time. At the same time, the torque of the manual tightening screws cannot be guaranteed to be consistent, which is more likely to cause major safety accidents such as damaging the cylinder and the clamp mechanism.

[0006] Therefore, we propose a device and method for automatically adjusting the cotton drop spacing of a combing machine. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the present invention provides a device and method for automatically adjusting the cotton drop spacing of a combing machine.

[0008] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0009] A combing machine cotton drop spacing automatic adjustment device comprises: an adjustment component, including an adjustment motor and an adjustment gear, the adjustment gear is fixedly arranged on the output shaft of the adjustment motor, and the adjustment motor is fixedly arranged on a sliding mechanism; a nipper assembly, including a nipper swing shaft and a fan-shaped gear part, the outer end of the nipper swing shaft is fixedly connected to the nipper, the fan-shaped gear part is fixedly arranged on the nipper swing shaft, and the sliding mechanism is used for the engagement and separation of the adjustment gear and the fan-shaped gear part; a reciprocating component, which is clamped with the inner end of the nipper swing shaft, the reciprocating component is fixedly connected to the main driving mechanism of the combing machine to realize the reciprocating rotation of the nipper swing shaft, the reciprocating component is also fixedly arranged on the sliding mechanism, and is combined and separated with the nipper swing shaft through the sliding mechanism, when the adjustment gear is engaged with the fan-shaped gear part, the nipper swing shaft and the reciprocating component are separated, and when the adjustment gear and the fan-shaped gear part are separated, the nipper swing shaft and the reciprocating component are combined.

[0010] When it is necessary to adjust the cotton drop gauge, the adjusting gear is meshed with the fan-shaped gear part on the nipper plate swing shaft through the sliding mechanism, and the adjusting motor is started to drive the fan-shaped gear part to rotate, so as to adjust the reciprocating starting angle of the nipper plate swing shaft, thereby adjusting the nipper plate connected to the nipper plate swing shaft, that is, adjusting the cotton drop gauge. After the adjustment, the fan-shaped gear part and the adjusting gear are separated by the sliding mechanism, and the nipper plate swing shaft and the reciprocating assembly are combined. At this time, the reset of the adjusted cotton drop gauge is completed, and the combing machine can work normally. Compared with manually adjusting the cotton drop gauge by comparing the scale, the motor-driven gear adjustment is more precise, and the adjustment can be completed by controlling the rotation angle of the motor, which is more convenient, saves manpower, and greatly improves efficiency.

[0011] It is further defined that the sliding mechanism includes a sliding seat, a sliding plate, a sliding cylinder and a shift fork; the sliding seat is fixedly arranged on the combing machine body, the cross-section of the sliding seat is concave, the sliding plate is also concave, the sliding plate includes a bottom plate and a first vertical plate and a second vertical plate vertically arranged at both ends of the bottom plate, the width of the sliding plate matches the opening width of the sliding seat, the sliding cylinder is fixedly arranged on the bottom surface of the sliding seat, and the piston rod is fixedly connected to the first vertical plate, the adjusting motor is fixedly arranged on the second vertical plate, and the output shaft passes through the second vertical plate, and the tail of the shift fork is fixedly arranged on the first vertical plate; the sliding plate in the sliding seat is pushed by the sliding cylinder on the sliding seat, so that the sliding plate fork and the adjusting motor move at the same time, realizing separation at one end and combination at the other end, the cylinder control is more precise, and the adjustment of both ends is completed in one step, which is more efficient.

[0012] It is further defined that the reciprocating assembly includes a reciprocating slide rod and a clutch sleeve shaft; the reciprocating slide rod is fixedly connected to the circumferential surface of the clutch sleeve shaft through a half structure, the outer end of the clutch sleeve shaft is provided with a shift ring, the inner end is provided with a clamping structure connected to the clamp plate swing shaft, and the shift ring is clamped on the shift fork; the shift fork cooperates with the shift ring to complete the engagement and separation operations of the clutch sleeve shaft, the structure is simple, and the manufacturing is convenient.

[0013] It is further defined that a fixed shaft is passed through the outer end of the clutch sleeve shaft, and the outer end of the fixed shaft is fixed on the body of the combing machine; by setting a fixed shaft to limit the position of the clutch sleeve shaft and fixing the fixed shaft on the combing machine, the force on the reciprocating slide rod can be greatly reduced and the service life of the device can be improved.

[0014] It is further defined that the inner wall of the Hough structure and the clutch sleeve shaft are both provided with key grooves along the axial direction of the clutch sleeve shaft and are connected by keys; the Hough structure is connected to the clutch sleeve shaft by keys, which can further enhance the connection stability between the Hough structure and the clutch sleeve shaft and prevent the reciprocating slide rod from slipping when driving the clutch sleeve shaft to reciprocate.

[0015] It is further defined that the clamping structure includes an inner gear ring and an outer gear, the outer gear is fixed to the inner end of the clutch sleeve shaft, and the inner gear ring is fixed to the inner end of the clamp plate swing shaft through a gear ring expansion sleeve.

[0016] It is further defined that the clamping structure is a spline structure, and the key teeth and key sleeves of the spline structure are respectively arranged on the inner end heads of the clutch sleeve shaft and the clamp plate swing shaft.

[0017] It is further defined that the clamping structure is a clutch structure, and the pressure plate and friction plate of the clutch structure are respectively arranged on the inner end heads of the clutch sleeve shaft and the pliers plate swing shaft.

[0018] A method for adjusting the above-mentioned combing machine noil gauge automatic adjustment device comprises the following steps:

[0019] S1. Turn off the comber. After the comber is completely turned off and stabilized, the snap-fit ​​structure is in a combined state, and the adjustment gear and the sector gear member are in a separated state;

[0020] S2. The sliding cylinder is turned on to retract, so that the adjustment gear is meshed with the sector gear member, and the sliding cylinder retracts while driving the shift fork to move, and the movement of the shift fork drives the shift ring to move, so that the snap-on structure is separated at this time;

[0021] S3. When the adjusting gear is meshed with the sector gear and the clamping structure is separated, the adjusting motor is controlled to turn on and the adjusting gear is rotated, driving the nipper swing shaft to rotate, and the adjusting motor is turned off after the nipper swing shaft rotates to the required angle;

[0022] S4. Open the sliding cylinder to extend forward, drive the clamping structure to combine and separate the adjusting gear and the fan-shaped gear to complete the cotton drop spacing adjustment.

[0023] The beneficial effects of the present invention are as follows: by setting an adjustment component, the cotton drop spacing is adjusted by meshing the adjustment gear of the adjustment component with the fan-shaped gear part of the nipper plate swing shaft, which is more accurate and more efficient than manual adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional schematic diagram of the adjustment state of the present invention;

[0025] Figure 2 A top view of the present invention in an adjusted state;

[0026] Figure 3 A top view of the present invention in working state;

[0027] Figure 4 It is a schematic diagram of the reciprocating direction of the present invention in a left-viewing angle;

[0028] Figure 5 This is a schematic diagram of cotton drop spacing;

[0029] Figure 6 Schematic diagram of the existing regulation structure.

[0030] The symbols of the components are as follows:

[0031] Adjusting assembly 1, adjusting motor 11, adjusting gear 12, nipper assembly 2, nipper swing shaft 21, fan-shaped gear member 22, reciprocating assembly 3, reciprocating slide rod 31, clutch sleeve shaft 32, keyway 33, shift ring 34, half structure 35, sliding mechanism 4, sliding seat 41, sliding plate 42, sliding cylinder 43, shift fork 44, clamping structure 5, inner ring gear 51, outer gear 52, ring gear expansion sleeve 53, fixed shaft 6. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0033] Embodiment 1:

[0034] like Figure 1-Figure 4As shown, an automatic adjustment device for the cotton drop gauge of a combing machine comprises an adjustment component 1, a nipper component 2, a reciprocating component 3 and a sliding mechanism 4; the adjustment component 1 comprises an adjustment motor 11 and an adjustment gear 12, and the adjustment gear 12 is fixedly arranged on the output shaft of the adjustment motor 11; the sliding mechanism 4 comprises a sliding seat 41, a sliding plate 42, a sliding cylinder 43 and a shift fork 44; the sliding seat 41 is fixedly arranged on the combing machine body, the cross section of the sliding seat 41 is concave, the sliding plate 42 is also concave, and the sliding plate 42 comprises a bottom plate and a first vertical plate 43 arranged vertically at both ends of the bottom plate The width of the sliding plate 42 matches the opening width of the sliding seat 41, the sliding cylinder 43 is fixedly arranged on the bottom surface of the sliding seat 41, and the piston rod is fixedly connected to the first vertical plate, the adjusting motor 11 is fixedly arranged on the second vertical plate, and the output shaft passes through the second vertical plate, and the tail of the shift fork 44 is fixedly arranged on the first vertical plate; the nipper plate assembly 2 includes a nipper plate swing shaft 21 and a fan-shaped gear member 22, the outer end of the nipper plate swing shaft 21 is fixedly connected to the nipper plate, the fan-shaped gear member 22 is fixedly arranged on the nipper plate swing shaft 21, and the sliding mechanism 4 is used to adjust the gear 12 and the fan-shaped gear member 22. The reciprocating assembly 3 includes a reciprocating slide rod 31 and a clutch sleeve shaft 32; the reciprocating slide rod 31 is fixedly connected to the main driving mechanism of the combing machine to realize the reciprocating rotation of the nipper swing shaft 21, and the reciprocating slide rod 31 is fixedly connected to the circumference of the clutch sleeve shaft 32 through a half structure 35. The inner wall of the half structure 35 and the clutch sleeve shaft 32 are both provided with a keyway 33 along the axial direction of the clutch sleeve shaft 32, and are connected by a key; the outer end of the clutch sleeve shaft 32 is provided with a dial ring 34, and the inner end is provided with a clamping structure 5 connected to the nipper swing shaft 21, and the dial ring 34 clamps Arranged on the shift fork 44, the clamping structure 5 includes an inner ring gear 51 and an outer gear 52, the outer gear 52 is fixedly arranged on the inner end of the clutch sleeve shaft 32, and the inner ring gear 51 is fixedly arranged on the inner end of the nipper plate swing shaft 21 through the ring gear expansion sleeve 53; a fixed shaft 6 is passed through the outer end of the clutch sleeve shaft 32, and the outer end of the fixed shaft 6 is fixedly arranged on the body of the combing machine; when the adjusting gear 12 and the fan-shaped gear part 22 are engaged, the nipper plate swing shaft 21 and the reciprocating assembly 3 are separated, and when the adjusting gear 12 and the fan-shaped gear part 22 are separated, the nipper plate swing shaft 21 and the reciprocating assembly 3 are combined.

[0035] When it is necessary to adjust the cotton drop gauge, the adjusting gear 12 is meshed with the fan-shaped gear part 22 on the nipper plate swing shaft 21 through the sliding mechanism 4, and the adjusting motor 11 is started to drive the fan-shaped gear part 22 to rotate, so as to adjust the reciprocating starting angle of the nipper plate swing shaft 21, thereby adjusting the nipper connected to the nipper plate swing shaft 21, that is, adjusting the cotton drop gauge. After the adjustment, the fan-shaped gear part 22 and the adjusting gear 12 are separated by the sliding mechanism 4, and the nipper plate swing shaft 21 and the reciprocating component 3 are combined. At this time, the reset of the cotton drop gauge after adjustment is completed, and the combing machine can work normally. Compared with manually adjusting the cotton drop gauge by comparing the scale, the motor-driven gear adjustment is more precise, and the adjustment can be completed by controlling the rotation angle of the motor, which is more convenient, saves manpower, and greatly improves efficiency. The sliding cylinder 43 on 41 pushes the sliding plate 42 in the sliding seat 41, so that the sliding plate 42 fork 44 and the adjusting motor 11 move simultaneously, realizing separation of one end and connection of the other end. The cylinder control is more precise, and the adjustment of both ends is completed in one step, which is more efficient; the shift ring 34 and the shift fork 44 cooperate to complete the connection and separation operation of the clutch sleeve shaft 32 by the shift fork 44, which has a simple structure and is easy to manufacture; by setting a fixed shaft 6 to limit the position of the clutch sleeve shaft 32, the fixed shaft 6 is fixedly set on the combing machine, which can greatly reduce the force on the reciprocating slide 31 and improve the service life of the device; the half structure 35 is connected to the clutch sleeve shaft 32 by a key, which can further improve the connection stability of the half structure 35 and the clutch sleeve shaft 32, and avoid the reciprocating slide 31 from slipping when driving the clutch sleeve shaft 32 to rotate reciprocatingly.

[0036] A method for adjusting the above-mentioned combing machine noil gauge automatic adjustment device comprises the following steps:

[0037] S1. Turn off the comber. After the comber is completely closed and stable, the snap-fit ​​structure 5 is in a combined state, and the adjustment gear 12 and the sector gear member 22 are separated;

[0038] S2. The sliding cylinder 43 is turned on to retract, so that the adjustment gear 12 is engaged with the sector gear member 22, and the sliding cylinder 43 retracts while driving the fork 44 to move, and the fork 44 moves and drives the ring 34 to move, so that the snap-fit ​​structure 5 is separated at this time;

[0039] S3. When the adjustment gear 12 is engaged with the sector gear member 22 and the snap-fit ​​structure 5 is separated, the control adjustment motor 11 is turned on and the adjustment gear 12 is rotated, driving the nipper swing shaft 21 to rotate, and the adjustment motor 11 is turned off after rotating to the desired angle;

[0040] S4. The sliding cylinder 43 is turned on to extend forward, driving the clamping structure 5 to engage and separate the adjusting gear 12 and the sector gear member 22 to complete the cotton drop spacing adjustment.

[0041] Embodiment 2:

[0042] The only difference between Example 2 and Example 1 is that the clamping structure 5 is a spline structure, and the key teeth and key sleeves of the spline structure are respectively arranged on the inner ends of the clutch sleeve shaft 32 and the pliers swing shaft 21.

[0043] Embodiment 3:

[0044] The only difference between Example 3 and Example 1 is that the clamping structure 5 is a clutch structure, and the pressure plate and friction plate of the clutch structure are respectively arranged on the inner end of the clutch sleeve shaft 32 and the pliers plate swing shaft 21.

Claims

1. An automatic adjustment device for the noil distance of a combing machine, characterized in that: include: An adjusting component (1) comprises an adjusting motor (11) and an adjusting gear (12), wherein the adjusting gear (12) is fixedly arranged on an output shaft of the adjusting motor (11), and the adjusting motor (11) is fixedly arranged on a sliding mechanism (4); The nipper assembly (2) comprises a nipper swing shaft (21) and a sector gear member (22), wherein the outer end of the nipper swing shaft (21) is fixedly connected to the nipper, the sector gear member (22) is fixedly arranged on the nipper swing shaft (21), and the sliding mechanism (4) is used for meshing and disengaging the adjusting gear (12) and the sector gear member (22); The reciprocating assembly (3) is clamped with the inner end of the nipper swing shaft (21). The reciprocating assembly (3) is fixedly connected to the main driving mechanism of the combing machine to realize the reciprocating rotation of the nipper swing shaft (21). The reciprocating assembly (3) is also fixedly arranged on the sliding mechanism (4) and is connected to and separated from the nipper swing shaft (21) through the sliding mechanism (4). When the adjusting gear (12) and the fan-shaped gear part (22) are engaged, the nipper swing shaft (21) and the reciprocating assembly (3) are separated. When the adjusting gear (12) and the fan-shaped gear part (22) are separated, the nipper swing shaft (21) and the reciprocating assembly (3) are connected.

2. The combing machine noil gauge automatic adjustment device according to claim 1, characterized in that: The sliding mechanism (4) comprises a sliding seat (41), a sliding plate (42), a sliding cylinder (43) and a shift fork (44); the sliding seat (41) is fixedly arranged on the combing machine body, the cross section of the sliding seat (41) is in a concave shape, the sliding plate (42) is also in a concave shape, the sliding plate (42) comprises a bottom plate and a first vertical plate and a second vertical plate vertically arranged at both ends of the bottom plate, the width of the sliding plate (42) matches the opening width of the sliding seat (41), the sliding cylinder (43) is fixedly arranged on the bottom surface of the sliding seat (41), and the piston rod is fixedly connected to the first vertical plate, the adjusting motor (11) is fixedly arranged on the second vertical plate, and the output shaft passes through the second vertical plate, and the tail of the shift fork (44) is fixedly arranged on the first vertical plate.

3. The combing machine noil gauge automatic adjustment device according to claim 2, characterized in that: The reciprocating assembly (3) comprises a reciprocating slide rod (31) and a clutch sleeve shaft (32); the reciprocating slide rod (31) is fixedly connected to the circumference of the clutch sleeve shaft (32) via a half structure (35); the outer end of the clutch sleeve shaft (32) is provided with a shift ring (34), and the inner end is provided with a clamping structure (5) connected to the clamp plate swing shaft (21); the shift ring (34) is clamped on the shift fork (44).

4. The combing machine noil gauge automatic adjustment device according to claim 3, characterized in that: A fixed shaft (6) is inserted into the outer end of the clutch sleeve shaft (32), and the outer end of the fixed shaft (6) is fixed on the body of the combing machine.

5. The combing machine noil gauge automatic adjustment device according to claim 4, characterized in that: The inner wall of the half structure (35) and the clutch sleeve shaft (32) are both provided with a key groove (33) along the axial direction of the clutch sleeve shaft (32) and are connected via a key.

6. The comber noil gauge automatic adjustment device according to claim 3, characterized in that: The clamping structure (5) comprises an inner gear ring (51) and an outer gear (52), wherein the outer gear (52) is fixedly arranged on the inner end of the clutch sleeve shaft (32), and the inner gear ring (51) is fixedly arranged on the inner end of the clamp plate swing shaft (21) via a gear ring expansion sleeve (53).

7. The combing machine noil gauge automatic adjustment device according to claim 3, characterized in that: The clamping structure (5) is a spline structure, and the key teeth and key sleeve of the spline structure are respectively arranged on the inner end heads of the clutch sleeve shaft (32) and the clamp plate swing shaft (21).

8. The comber noil gauge automatic adjustment device according to claim 3, characterized in that: The clamping structure (5) is a clutch structure, and the pressure plate and friction plate of the clutch structure are respectively arranged on the inner end of the clutch sleeve shaft (32) and the clamp plate swing shaft (21).

9. A method for adjusting the comber noil gauge automatic adjustment device according to any one of claims 1 to 8, characterized in that: The steps include: S1. Turn off the comber. After the comber is completely turned off and stabilized, the snap-fit ​​structure (5) is in a combined state, and the adjustment gear (12) and the sector gear member (22) are in a separated state; S2. The sliding cylinder (43) is turned on to retract, so that the adjustment gear (12) is meshed with the sector gear member (22). The sliding cylinder (43) retracts and drives the shift fork (44) to move. The movement of the shift fork (44) drives the shift ring (34) to move, so that the snap-fit ​​structure (5) is separated at this time; S3. When the adjusting gear (12) is meshed with the sector gear (22) and the clamping structure (5) is separated, the adjusting motor (11) is controlled to be turned on and the adjusting gear (12) is rotated, driving the nipper swing shaft (21) to rotate, and the adjusting motor (11) is turned off after rotating to the required angle; S4. The sliding cylinder (43) is opened and extended forward, driving the clamping structure (5) to engage and separate the adjusting gear (12) and the fan-shaped gear member (22) to complete the cotton drop spacing adjustment.