A gilling roller for a combing machine

Abstract

The utility model provides a kind of cotton feed roller for carding machine, belong to carding machine technical field, technical scheme is, a kind of cotton feed roller for carding machine, including roller body, roller body two ends are respectively fixed with the roller shaft coaxial with roller body, the outside of each roller shaft is equipped with first half ring shaft sleeve and second half ring shaft sleeve, first half ring shaft sleeve and second half ring shaft sleeve can mutually split, and after split, it can be commonly connected in the outer peripheral surface of roller shaft and be fixed with roller shaft, the split surface of first half ring shaft sleeve is equipped with tenon, the split surface of second half ring shaft sleeve is equipped with mortise groove adapted with tenon, tenon and mortise groove are fixed by interference fit insertion connection.The utility model has the beneficial effect that the structure can avoid that pressurized shaft sleeve directly contacts roller shaft, to effectively prevent roller shaft abrasion;If shaft sleeve appears abrasion subsequently, only need to replace first half ring shaft sleeve and second half ring shaft sleeve, without needing to replace cotton feed roller as a whole, greatly reduce maintenance cost and operation complexity.

Description

Technical Field

[0001] This utility model belongs to the technical field of carding machines, specifically relating to a cotton feed roller for a combing machine. Background Technology

[0002] In the combing machine equipment of the cotton spinning industry, the feed roller is the core functional component connecting the cotton lap unwinding and fiber combing. Its core function is to receive the cotton web unwinding from the lap roller and, through its stable rotation, evenly feed the cotton web into the combing jaws composed of the upper and lower nibs, providing the foundation for subsequent cylinder combing and the output of the combed sliver from the separating rollers. The uniformity of the feed roller's feeding directly determines the quality of the cotton web formation and the evenness of the combed yarn. If the feed rate fluctuates, it will directly lead to uneven fiber distribution in subsequent combing processes, thus affecting the strength and surface smoothness of the final spun yarn.

[0003] As shown in patent CN215828945U, the feeding roller mainly consists of a roller body, a first roller shaft, and a second roller shaft. The roller body is the main load-bearing component, and its outer wall is provided with spirally wound feeding protrusions. The cross-section of these feeding protrusions is trapezoidal, formed by a first inclined side, a top surface, and a second inclined side sequentially enclosing them, with gaps between the protrusions forming inverted trapezoidal tenons to enhance the gripping and conveying effect on the cotton web. The first and second roller shafts are fixed to both ends of the roller body, and keyways are provided on the shafts for power transmission. Furthermore, the roller body, roller shaft, and feeding protrusions are mostly manufactured using an integrated molding process to ensure the overall structural strength of the feeding roller.

[0004] However, the first and second rollers need to work directly with the pressure sleeve of the combing machine. To ensure stable web feeding, the pressure sleeve needs to continuously apply radial pressure to the rollers. This radial pressure causes the outer wall of the rollers and the inner wall of the pressure sleeve to be in a state of frequent sliding friction for a long time. After the rollers wear out over time, the entire feed roller needs to be disassembled and replaced. This maintenance method is not only cumbersome and time-consuming, but also significantly increases the equipment maintenance cost. Utility Model Content

[0005] This invention addresses the problem of easy wear on the feed roller shaft, which necessitates complete replacement and incurs high costs. It provides a feed roller for combing machines that avoids direct wear on the feed roller shaft and eliminates the need for complete replacement of the feed roller.

[0006] To solve the above problems, the present invention adopts the following technical solution: a cotton feeding roller for a combing machine, comprising a roller body, with roller shafts coaxial with the roller body fixed at both ends. Each roller shaft is provided with a first semi-ring sleeve and a second semi-ring sleeve on its outer side. The first semi-ring sleeve and the second semi-ring sleeve can be spliced ​​together and, after splicing, can be fitted together on the outer circumference of the roller shaft and fixed to the roller shaft. The first semi-ring sleeve has a tenon on its mating surface, and the second semi-ring sleeve has a tenon groove adapted to the tenon on its mating surface. The tenon and the tenon groove are fixed by interference fit.

[0007] In this technical solution, roller shafts coaxial with the roller body are fixed at both ends of the roller body. Each roller shaft is equipped with a first semi-ring bushing and a second semi-ring bushing, which can be spliced ​​together. After splicing, they are fitted together on the outer circumference of the roller shaft and fixed to the roller shaft. The first semi-ring bushing has a tenon on its mating surface, and the second semi-ring bushing has a mortise that matches the tenon on its mating surface. The tenon and mortise are fixed by interference fit. In actual use, the pressure bushing directly forms a rotational fit with the spliced ​​first and second semi-ring bushings. This fit method can avoid the pressure bushing directly contacting the roller shaft, thereby effectively preventing roller shaft wear. If the bushings wear out later, only the first and second semi-ring bushings need to be replaced, without replacing the entire cotton feeding roller, which greatly reduces maintenance costs and operational complexity.

[0008] Furthermore, the tenon has a cuboid structure with a chamfered edge at its end facing the mortise. The inner contour of the mortise matches the outer contour of the tenon. The cuboid's multi-faceted flatness and regular dimensions allow for a perfectly fitted surface with the appropriate mortise. This design effectively limits the radial wobble and circumferential rotation of the tenon within the mortise, preventing gaps between the bushing and the roller shaft that could cause eccentricity during rotation. It also prevents slippage of the bushing as it rotates with the pressure bushing, ensuring synchronized operation between the bushing and the roller shaft. This, in turn, guarantees stable rotational speed of the feeding roller and prevents uneven cotton feeding caused by bushing misalignment. On the other hand, the large contact area of ​​the cuboid fit allows for more even stress distribution between the tenon and the mortise. When the feeding roller is subjected to radial pressure from the pressure bushing, it prevents localized stress concentration that could cause cracking in the mortise or deformation of the tenon, thus extending the bushing's service life.

[0009] Furthermore, each roller shaft has two sealing lips on its exterior, spaced apart along the axial direction of the roller shaft. Each sealing lip is fitted onto the outer circumferential surface of the first and second semi-ring sleeves, respectively. The pressure sleeve is fitted over the first and second semi-ring sleeves, with gaps at both ends. These gaps are the main pathways for cotton lint intrusion. If only one sealing lip is provided, a protective gap will appear at the unprotected end of the pressure sleeve, allowing cotton lint to easily enter between the pressure sleeve and the semi-ring sleeve through this gap. The two sealing lips, corresponding to both ends of the pressure sleeve, precisely cover these two critical gap locations, directly forming an end separation barrier at the mating ends of the pressure sleeve and the first and second semi-ring sleeves. This prevents cotton lint from seeping in from both ends of the sleeve, avoiding interference with the pressure sleeve's rotation or wear on the semi-ring sleeves after cotton lint enters.

[0010] Furthermore, the sealing lips are trumpet-shaped and made of elastic rubber. The flared ends of the two sealing lips on each roller are positioned opposite each other along the roller shaft axis. The flared ends of the two sealing lips, positioned opposite each other along the roller shaft axis, precisely correspond to the inner sides of both ends of the pressure bushing. The trumpet-shaped flare naturally fits the ends of the pressure bushing, forming an end-wrapping seal: the opposing flared ends can tightly cover the gap between the pressure bushing and the semi-ring bushing from the inner sides of both ends of the pressure bushing, preventing cotton fibers from seeping in through the gaps at the bushing ends. Compared to a flat sealing lip without flare, the trumpet-shaped flare increases the sealing contact area. Especially for any small assembly gaps that may exist at the ends of the pressure bushing, the flared structure can more comprehensively cover the gap area, spatially blocking the path of cotton fiber intrusion.

[0011] Furthermore, both the first and second semi-annular bushings have reduced-diameter sections extending circumferentially on their outer surfaces. These reduced-diameter sections are located axially along the roller shaft outside the sealing lip. The reduced-diameter sections of the first and second semi-annular bushings circumferentially align and are fitted together with a retaining ring. The two reduced-diameter sections form an annular structure that precisely matches the annular shape of the retaining ring, ensuring a tight fit around the bushing's outer circumference after fitting. This prevents the retaining ring from shifting or loosening due to incomplete reduced-diameter sections, providing a stable mounting base for the retaining ring. Simultaneously, the reduced-diameter sections' axial position outside the sealing lip provides independent installation space for the retaining ring while preventing direct contact between the retaining ring and the sealing lip. The sealing lip can function normally on its inner side, providing elastic anti-flocking protection, while the retaining ring focuses on fixing the bushing on its outer side. The functions of both operate independently, ensuring simultaneous sealing and fixing effects.

[0012] Furthermore, the inner walls of both the first and second semi-ring bushings are provided with several bosses, and the outer circumferential surface of the roller shaft is provided with several grooves. Each groove corresponds to and fits one-to-one with a boss, with the bosses engaging in their respective grooves. This precisely limits the relative movement of the first and second semi-ring bushings with the roller shaft, ensuring synchronized operation. The one-to-one engagement of the bosses and grooves prevents relative sliding and avoids disruption of the cotton feeding rhythm.

[0013] Furthermore, the boss is hemispherical, and the groove is a hemispherical recess that fits the boss. The curved surface of the hemispherical boss and the hemispherical recess makes it easier to achieve precise alignment compared to a structure with sharp edges. During assembly, the curved surface of the boss can naturally guide it into the recess. Even if there are slight circumferential or radial deviations when the semi-ring bushing is assembled, the curved surface shape can accommodate these errors, avoiding jamming problems caused by excessively high alignment requirements. This makes the assembly operation of the bushing and the roller more convenient, especially suitable for rapid installation in mass production or on-site maintenance.

[0014] Furthermore, the outer circumferential surface of the first semi-ring bushing is provided with a keyway extending axially along its axis, and the keyway is located outside the retaining ring along the roller shaft axis. The core function of the keyway is to cooperate with the matching key to form a circumferential limiting structure. When the feed roller requires an external transmission component, the key can be embedded in the keyway of this component and the keyway of the external component, strictly limiting the relative circumferential rotation between the external component and the first semi-ring bushing, ensuring that the external component operates synchronously with the bushing and roller shaft, avoiding a decrease in transmission efficiency or disorder in the feeding rhythm due to slippage, and ensuring the transmission coordination between the feed roller and subsequent equipment.

[0015] Furthermore, both the outer circumferential surfaces of the first and second semi-ring bushings are provided with a lubricating coating, which is located between the two sealing lips along the roller shaft axis. The area between the two sealing lips is the main mating area between the pressure bushing and the first and second semi-ring bushings. The pressure bushing needs to rotate continuously relative to the semi-ring bushings, making this area prone to wear due to friction. The lubricating coating forms a lubricating film on the outer circumferential surfaces of the first and second semi-ring bushings, separating the metal contact surfaces between the first and second semi-ring bushings and the pressure bushing, preventing surface scratches and wear caused by dry friction, significantly slowing down the wear rate of the bushing's outer circumferential surface, extending the service life of the semi-ring bushings, and reducing frequent replacements due to excessive bushing wear.

[0016] Furthermore, both the inner walls of the first and second semi-ring bushings are coated with an anti-slip coating. This anti-slip coating significantly increases the coefficient of friction between the inner walls of the first and second semi-ring bushings and the outer circumference of the roller, enhancing the tightness of their fit. Even if a small gap develops between the bushing and the roller due to long-term operation, or if slippage occurs due to vibration, the coating can suppress relative displacement through stable friction, ensuring that the bushing always rotates synchronously with the roller, thus preventing bushing misalignment and roller wear caused by slippage.

[0017] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. Protects the roller shaft and reduces maintenance costs. The first and second half-ring bushings isolate the pressure bushing from the roller shaft, preventing roller shaft wear. Subsequently, only the worn first and second half-ring bushings need to be replaced, without replacing the entire cotton roller, which greatly reduces maintenance costs and operational complexity. 2. It prevents lint and ensures stable operation. The double sealing lips precisely block lint from entering from both ends of the pressure bushing, and the lubricating coating reduces friction and wear between the bushing and the pressure bushing, ensuring smooth operation of the cotton feeding roller for a long time and avoiding jamming and uneven cotton feeding caused by lint or wear. 3. Easy to assemble and highly adaptable, the design of the chamfered tenon, hemispherical boss and recess simplifies the assembly of the shaft set and reduces the difficulty of alignment; the keyway can be adapted to external transmission components, taking into account both installation efficiency and functional expandability, and adapting to different usage scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the roller shaft in a specific embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of the first and second half-ring bushings in a specific embodiment of the present utility model.

[0020] In the figure: 1. Roller body; 2. Roller shaft; 21. Groove; 3. First half-ring bushing; 31. Tenon; 32. Keyway; 4. Second half-ring bushing; 41. Tenon groove; 5. Sealing lip; 6. Reduction section; 61. Snap ring; 7. Boss; 8. Lubricating coating; 9. Anti-slip coating. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] A type of combing machine uses cotton rollers, such as Figure 1 As shown, it includes a roller body 1, which is an existing structure that can continuously transport cotton fibers. Roller shafts 2 are provided at both ends of the roller body 1. The roller shafts 2 and the roller body 1 are integrally formed and are coaxially arranged. The overall structure is stable and the coaxiality is precise.

[0023] like Figure 2 As shown in this specific embodiment, each roller shaft 2 is externally fitted with a first semi-ring sleeve 3 and a second semi-ring sleeve 4, which can be joined together along their mating surfaces. After joining, the first semi-ring sleeve 3 and the second semi-ring sleeve 4 form an annular structure that fits the outer circumference of the roller shaft 2, and a small gap is reserved between the mating surfaces of the two semi-ring sleeves. This gap can effectively avoid structural stress concentration caused by temperature changes, assembly errors, or long-term operational vibrations, preventing cracking and deformation of the first semi-ring sleeve 3 and the second semi-ring sleeve 4, while not affecting their wrapping and fixing effect on the roller shaft 2, ensuring the structural stability of the sleeves during long-term use. Figure 4 As shown, the specific fixing method of the two is as follows: the first half-ring bushing 3 has a tenon 31 integrally provided on the mating surface, and the second half-ring bushing 4 has a corresponding tenon 41 on the mating surface. The tenon 31 is a cuboid structure, and its end edge facing the tenon 41 has a chamfer. The inner cavity contour of the tenon 41 is completely matched with the outer contour of the tenon 31. During assembly, the tenon 31 and the tenon 41 are fixed by interference fit. With the surface fitting characteristics of the cuboid structure and the interference pressure, it can still be ensured that the first half-ring bushing 3 and the second half-ring bushing 4 are not loose after being assembled, even with the reserved gap. At the same time, the chamfer design can guide the tenon 31 to quickly align with the tenon 41, reducing the difficulty of assembly operation.

[0024] The inner walls of both the first semi-ring bushing 3 and the second semi-ring bushing 4 are covered with an anti-slip coating 9. This anti-slip coating 9 directly adheres to the outer circumferential surface of the roller shaft 2, increasing the coefficient of friction between the contact surfaces and enhancing the tightness of the fit between the bushing and the roller shaft 2. Simultaneously, the inner walls of both the first semi-ring bushing 3 and the second semi-ring bushing 4 are also evenly distributed with several hemispherical protrusions 7, such as... Figure 3As shown, the outer circumferential surface of the roller 2 is provided with several hemispherical grooves 21. The grooves 21 correspond one-to-one with the bosses 7 and are adapted in shape. During assembly, each boss 7 is engaged in the corresponding groove 21 and works in conjunction with the anti-slip coating 9 to restrict the relative displacement of the first semi-ring bushing 3, the second semi-ring bushing 4 and the roller 2 from both circumferential and radial directions, ensuring that the three operate synchronously and avoiding relative slippage.

[0025] Each roller 2 is also equipped with two sealing lips 5. The two sealing lips 5 are spaced apart along the axial direction of the roller 2 and are respectively fitted onto the outer circumferential surfaces of the first semi-ring sleeve 3 and the second semi-ring sleeve 4. The sealing lips 5 are trumpet-shaped and made of elastic rubber. The edge of the flared end faces the pressure sleeve fitted onto the outside of the first semi-ring sleeve 3 and the second semi-ring sleeve 4. After assembly, the edge of the flared end of the sealing lip 5 directly fits against the end face of the pressure sleeve. Through the natural deformation of the elastic rubber, it forms a tight contact with the end face of the pressure sleeve, thereby completely sealing the gap between the pressure sleeve and the first semi-ring sleeve 3 and the second semi-ring sleeve 4, effectively preventing cotton fibers from entering through the gap. Two sealing lips 5 are respectively set on the two end faces of the pressure sleeve, forming a symmetrical end sealing structure to ensure that the gaps on both sides of the pressure sleeve are reliably covered; and the sealing lips 5 are located on the outside of the lubricating coating 8 along the axial direction of the roller shaft 2, so as not to interfere with the lubricating effect of the lubricating coating 8 on the mating area of ​​the pressure sleeve and the first half-ring bushing 3 and the second half-ring bushing 4, and to provide stable anti-flocculent protection for the internal structure.

[0026] The outer circumferential surfaces of the first semi-annular bushing 3 and the second semi-annular bushing 4 are each provided with a reduced diameter section 6. The reduced diameter section 6 extends circumferentially and is located on the outside of the sealing lip 5 along the axial direction of the roller shaft 2. When the first semi-annular bushing 3 and the second semi-annular bushing 4 are assembled, their reduced diameter sections 6 are joined circumferentially to form an annular reduced diameter structure that is adapted to the installation of the retaining ring 61. The retaining ring 61 is fitted onto this annular reduced diameter structure. The retaining ring 61 further fixes the first semi-annular bushing 3 and the second semi-annular bushing 4 through radial clamping force to prevent loosening at the joint. At the same time, the gap reserved on the joint surface of the reduced diameter section 6 can accommodate the slight deformation generated when the retaining ring 61 is clamped, preventing the reduced diameter section 6 from being damaged by rigid extrusion. In addition, the outer circumferential surface of the first semi-ring sleeve 3 is provided with a keyway 32 extending along its axial direction. The keyway 32 is located on the outside of the retaining ring 61 along the axial direction of the roller shaft 2. It is used to connect with the transmission gear through the key, so as to realize the circumferential fixation of the transmission gear and the first semi-ring sleeve 3, and ensure that the transmission gear rotates synchronously with the first semi-ring sleeve 3, the second semi-ring sleeve 4 and the roller shaft 2.

[0027] Working process: When the cotton roller is working, it first establishes a connection with the transmission gear through the keyway 32 on the outer circumference of the first half-ring sleeve 3. After receiving power, the transmission gear drives the first half-ring sleeve 3 to rotate. Since the first half-ring sleeve 3 and the second half-ring sleeve 4 are assembled by the interference fit of the tenon 31 and the groove 41, and the anti-slip coating 9 on the inner wall of both are attached to the outer circumference of the roller shaft 2, and the boss 7 is engaged in the groove 21 of the roller shaft 2, it can be ensured that the first half-ring sleeve 3, the second half-ring sleeve 4 and the roller shaft 2 rotate synchronously, thereby driving the roller body 1 to run.

[0028] As an existing structure, roller 1 continuously transports cotton fibers under the drive of roller 2 to complete the cotton feeding process. During this process, the pressure sleeve, which is sleeved outside the first half-ring bushing 3 and the second half-ring bushing 4, rotates synchronously with the bushing. The lubricating coating 8 located between the two sealing lips 5 on the outer circumference of the first half-ring bushing 3 and the second half-ring bushing 4 can reduce the friction between the pressure sleeve and the bushing, ensure the smooth rotation of the pressure sleeve, and avoid affecting the cotton feeding rhythm due to excessive friction.

[0029] Meanwhile, the two sealing lips 5, with their flared edges fitting against the end face of the pressure sleeve, can seal the gaps between the pressure sleeve and the first half-ring bushing 3 and the second half-ring bushing 4, effectively preventing cotton lint generated during the operation of the cotton roller from entering the mating area between the bushing and the pressure sleeve, thus preventing cotton lint accumulation from causing rotational jamming. In addition, the retaining ring 61 fitted onto the reduced diameter section 6 always maintains the stable engagement of the first half-ring bushing 3 and the second half-ring bushing 4 through radial clamping force, preventing the bushing from loosening during long-term operation and ensuring that the entire cotton feeding roller continuously and stably completes the cotton fiber transport work.

[0030] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. Protects the roller shaft and reduces maintenance costs. The first and second half-ring bushings isolate the pressure bushing from the roller shaft, preventing roller shaft wear. Subsequently, only the worn first and second half-ring bushings need to be replaced, without replacing the entire cotton roller, which greatly reduces maintenance costs and operational complexity. 2. It prevents lint and ensures stable operation. The double sealing lips precisely block lint from entering from both ends of the pressure bushing, and the lubricating coating reduces friction and wear between the bushing and the pressure bushing, ensuring smooth operation of the cotton feeding roller for a long time and avoiding jamming and uneven cotton feeding caused by lint or wear. 3. Easy to assemble and highly adaptable, the design of the chamfered tenon, hemispherical boss and recess simplifies the assembly of the shaft set and reduces the difficulty of alignment; the keyway can be adapted to external transmission components, taking into account both installation efficiency and functional expandability, and adapting to different usage scenarios.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cotton feed roller for a combing machine, comprising a roller body (1), wherein roller shafts (2) coaxial with the roller body (1) are fixed at both ends of the roller body (1), characterized in that, Each roller shaft (2) is provided with a first half-ring sleeve (3) and a second half-ring sleeve (4) on its outside. The first half-ring sleeve (3) and the second half-ring sleeve (4) can be spliced ​​together and can be sleeved together on the outer circumference of the roller shaft (2) and fixed to the roller shaft (2). The first half-ring sleeve (3) has a tenon (31) on its split surface and the second half-ring sleeve (4) has a tenon groove (41) that matches the tenon (31) on its split surface. The tenon (31) and the tenon groove (41) are fixed by interference fit.

2. The cotton feed roller for a combing machine according to claim 1, characterized in that, The tenon (31) is a cuboid structure. The end edge of the tenon (31) facing the mortise (41) is chamfered. The inner contour of the mortise (41) matches the outer contour of the tenon (31).

3. The cotton feed roller for a combing machine according to claim 1, characterized in that, Each roller (2) has two sealing lips (5) on its outside. The two sealing lips (5) are distributed at intervals along the axial direction of the roller (2), and the two sealing lips (5) are respectively sleeved on the outer circumferential surfaces of the first half-ring sleeve (3) and the second half-ring sleeve (4) outside the corresponding roller (2).

4. The cotton feed roller for a combing machine according to claim 3, characterized in that, The sealing lip (5) is trumpet-shaped and made of elastic rubber. The flared ends of the two sealing lips (5) on each roller (2) are arranged opposite each other along the axial direction of the roller (2).

5. The cotton feed roller for a combing machine according to claim 3, characterized in that, The outer circumferential surfaces of the first half-ring sleeve (3) and the second half-ring sleeve (4) are provided with a reduced diameter section (6) extending along their respective circumferential directions. The reduced diameter sections (6) of the first half-ring sleeve (3) and the second half-ring sleeve (4) are located on the outside of the sealing lip (5) along the axial direction of the roller shaft (2). The reduced diameter section (6) of the first half-ring sleeve (3) and the reduced diameter section (6) of the second half-ring sleeve (4) are circumferentially connected and are fitted with a retaining ring (61).

6. The cotton feed roller for a combing machine according to claim 1, characterized in that, The inner wall surfaces of the first half-ring sleeve (3) and the second half-ring sleeve (4) are provided with several bosses (7), and the outer circumferential surface of the roller (2) is provided with several grooves (21). The several grooves (21) correspond one-to-one with the several bosses (7) and are adapted to each other. The bosses (7) are respectively engaged in the corresponding grooves (21).

7. The cotton feed roller for a combing machine according to claim 6, characterized in that, The boss (7) is hemispherical, and the groove (21) is set as a hemispherical recess that fits the boss (7).

8. The cotton feed roller for a combing machine according to claim 5, characterized in that, The outer circumferential surface of the first semi-ring sleeve (3) is provided with a keyway (32) extending along its axial direction, and the keyway (32) is located on the outside of the retaining ring (61) along the axial direction of the roller shaft (2).

9. The cotton feed roller for a combing machine according to claim 3, characterized in that, The outer circumferential surfaces of the first semi-ring sleeve (3) and the second semi-ring sleeve (4) are provided with a lubricating coating (8), which is located between the two sealing lips (5) along the axial direction of the roller shaft (2).

10. The cotton feed roller for a combing machine according to claim 1, characterized in that, The inner walls of the first half-ring bushing (3) and the second half-ring bushing (4) are both provided with anti-slip coating (9).

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