Automatic doffer mechanism for a carding machine

Abstract

The application discloses an automatic bobbin changing mechanism for a carding machine, which comprises a fixed base, a U-shaped material rack arranged on the fixed base, a sliver bobbin arranged on the U-shaped material rack, a bobbin changing mechanism arranged at the center of the U-shaped material rack, and an auxiliary limiting mechanism arranged on the fixed base; the bobbin changing mechanism comprises a driving motor, a driving wheel mounted on the output shaft of the driving motor, an adjusting wheel arranged on the fixed base, a synchronous belt connected between the adjusting wheel and the driving wheel, two arc-shaped plates sleeved on the output shaft of the driving motor, and elastic components used for hingedly connecting the arc-shaped plates and the fixed base; the application has the beneficial effects that the synchronous belt can be switched between a circular shape and an elliptical shape, the functions of bobbin changing and coiling are integrated in the same mechanism, the switching process of the two working conditions is smooth and natural, the continuous operation efficiency of the equipment is improved, the roller at the bottom of the sliver bobbin is not suspended, the tray does not need to be used to contact the bobbin bottom, and the bobbin bottom is prevented from being deformed.

Description

Technical Field

[0001] This invention relates to the field of textile machinery technology, and more specifically, to an automatic carding machine bobbin changing mechanism. Background Technology

[0002] The carding machine is one of the key pieces of equipment in the textile industry. Its main function is to comb the fiber raw material, turning it into neatly arranged cotton slivers, and then winding and collecting the combed cotton slivers in sliver cans. The sliver cans, as an important carrier for holding and transferring cotton slivers, need to be frequently replaced during the continuous production process of the carding machine to ensure production continuity.

[0003] The existing carding machine automatic can changing structure generally adopts a dual-mechanism independent working mode: that is, a separate translation or turntable changing mechanism is set up to complete the can entry and exit changing action of the cotton sliver can, while an additional bottom rotary tray mechanism is configured, which drives the cotton sliver can to rotate in place by friction on the bottom surface of the cotton sliver can, so as to cooperate with the coiler to complete the cotton sliver winding and forming.

[0004] The can changing mechanism and the rotary drive mechanism are independent of each other, with a relatively complex structure and many parts, resulting in high maintenance costs. The switching between can changing and winding conditions is not smooth enough, affecting the continuous operation efficiency of the equipment. The rotary drive mechanism requires friction transmission between the bottom plane of the cotton sliver can and the rotary tray. However, the bottom of the general cotton sliver can in the workshop is equipped with transfer rollers. When working on the machine, it must be suspended in the air, which easily leads to slippage and uneven speed. After long-term use, the bottom of the can is prone to deformation, affecting the quality of the coiled sliver. Summary of the Invention

[0005] To address the above deficiencies, this invention provides an automatic carding machine bobbin changing mechanism, which solves the aforementioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic bobbin changing mechanism for a carding machine includes a fixed base, a U-shaped material rack on the fixed base, a plurality of vertically arranged guide rollers rotatably connected to the U-shaped material rack, a cotton sliver bob on the U-shaped material rack, the cotton sliver bob moving within the U-shaped material rack, a bobbin changing mechanism at the center of the U-shaped material rack, and an auxiliary limiting mechanism on the fixed base located outside the center of the U-shaped material rack for auxiliary limiting of the cotton sliver bob during winding. The drum-changing mechanism includes a drive motor, a drive wheel mounted on the output shaft of the drive motor, an adjusting wheel on the fixed base, a synchronous belt connecting the adjusting wheel and the drive wheel, two arc-shaped plates sleeved on the output shaft of the drive motor, the synchronous belt wrapped around the drive wheel, the adjusting wheel and the two arc-shaped plates, the outer wall of the arc-shaped plates fitting against the inner side of the synchronous belt, the arc-shaped plates being hinged to the fixed base via an elastic component, the drive wheel rotating synchronously with the output shaft of the drive motor, and the arc-shaped plates passively rotating around the output shaft; Under the action of the elastic component, the arc plate expands outward, making the timing belt form a circle. The outer wall of the timing belt contacts the cotton sliver can, driving the cotton sliver can to move within the U-shaped material frame. When the cotton sliver is coiled, the adjusting wheel moves, and the arc plate rotates inward under the force of the timing belt. The timing belt deforms into an ellipse, and only the timing belt section on the drive wheel contacts the cotton sliver can, driving the cotton sliver can to rotate.

[0007] Furthermore, the elastic component includes a compression spring, a first fixed shaft is fixedly connected to the end of the arc plate away from the drive motor, a first connecting member is rotatably connected to the first fixed shaft, two second fixed shafts are installed on the fixed base, a second connecting member is rotatably connected to the second fixed shaft, and the compression spring is connected between the second connecting member and the first connecting member.

[0008] Furthermore, a first linear drive element is installed on the fixed base, a sliding adjustment block is fixedly connected to the output end of the first linear drive element, a guide rail is connected to the surface of the fixed base, the sliding adjustment block is slidably engaged with the guide rail, and the adjustment wheel is rotatably connected to the top of the sliding adjustment block.

[0009] The sliding adjustment block is guided by a guide rail to prevent the position of the sliding adjustment block and the adjustment wheel from shifting.

[0010] Furthermore, the two arc-shaped plates are symmetrically arranged inside the synchronous belt, and the arc-shaped plates are sleeved on the output shaft of the drive motor and rotate around the output shaft of the drive motor.

[0011] Furthermore, the auxiliary limiting mechanism includes a fixed side plate fixedly installed on a fixed base. The fixed side plate is located outside the center of the U-shaped material rack. A second linear drive element is installed on the fixed side plate. A push plate is fixedly connected to the telescopic end of the second linear drive element. A fixed frame is installed on the push plate. An auxiliary roller is rotatably connected to the fixed frame. When changing the sliver, the push plate and the auxiliary roller move away from the sliver can; when winding the sliver, the second linear drive element pushes the push plate to make the auxiliary roller fit against the outer wall of the sliver can.

[0012] The auxiliary roller on the fixed frame fits against the outer wall of the cotton sliver can and provides auxiliary positioning for the cotton sliver can. During the winding process, the auxiliary roller always fits against the outer wall of the cotton sliver can, preventing the cotton sliver can from shifting or shaking, thus improving the winding quality of the cotton sliver.

[0013] Furthermore, a plurality of guide sleeves are fixedly connected to the fixed side plate, and a guide rod is slidably connected inside the guide sleeve, with one end of the guide rod being fixedly connected to the push plate.

[0014] The push plate is guided by a guide sleeve and a guide rod to prevent it from tilting or deviating.

[0015] Furthermore, the outer surface of the timing belt is provided with a friction layer to increase the friction between the timing belt and the outer wall of the cotton sliver can.

[0016] The friction layer increases the friction between the timing belt and the outer wall of the sliver can, ensuring that slippage does not occur during transmission.

[0017] Furthermore, the guide rollers are arranged along the inner arc direction of the U-shaped material frame, and the roller surfaces of multiple guide rollers together form a guiding and limiting surface for the outer wall of the cotton sliver tube. The outer wall of the cotton sliver tube is in contact with the guide rollers. One end of the U-shaped material frame is the feed inlet, and the other end of the U-shaped material frame is the discharge outlet.

[0018] The cotton sliver can enters the U-shaped material frame through the feed port and leaves the U-shaped material frame through the discharge port. The guide roller guides the cotton sliver can to move along the U-shaped material frame and prevents it from deviating during the movement.

[0019] The beneficial effects of this invention are: 1. By attaching an arc-shaped plate to the output shaft of the drive motor and hinged the arc-shaped plate to the fixed base through an elastic component, and cooperating with the linear movement of the adjusting wheel, the synchronous belt can switch between circular and elliptical shapes. The spool changing and winding functions are integrated into the same mechanism. When changing the spool, the synchronous belt is circular and wraps around the cotton spool to drive its movement. When winding, the synchronous belt is elliptical and drives the cotton spool to rotate only through the drive wheel segment. The switching process between the two working conditions is smooth and natural, without the need to stop the machine to adjust or replace the equipment, thus improving the continuous operation efficiency of the equipment. 2. There is no need for the bottom of the tampons to rub against the tray, and there is no need to lift the tube. The rollers at the bottom of the tampons can be retained to avoid the rollers being suspended in the air. There is no need to use a tray to contact the bottom of the tube, so there will be no slippage and the bottom of the tube will not be deformed. Attached Figure Description

[0020] Figure 1 This is a top view of the overall structure of the invention; Figure 2 This is a schematic diagram of the drum-changing mechanism in the coiled state; Figure 3 This is an enlarged view of the cylinder changing mechanism in the cylinder changing state; Figure 4 This is an enlarged view of the drum-changing mechanism in the coiled state; Figure 5 This is an enlarged view of the curved plate and the elastic component; Figure 6 This is a schematic diagram of the drive components of the cylinder changing mechanism; Figure 7 This is an enlarged top view of the auxiliary limiting mechanism; Figure 8 This is an enlarged front view of the auxiliary limiting mechanism; In the diagram, 1. Fixed base; 2. U-shaped material rack; 3. Guide roller; 4. Cotton sliver tube; 5. Drive motor; 6. Drive wheel; 7. Adjusting wheel; 8. Synchronous belt; 9. Arc plate; 10. Elastic assembly; 11. Compression spring; 12. First fixed shaft; 13. First connecting piece; 14. Second fixed shaft; 15. Second connecting piece; 16. First linear drive element; 17. Sliding adjusting block; 18. Fixed side plate; 19. Second linear drive element; 20. Push plate; 21. Fixed frame; 22. Auxiliary roller; 23. Guide sleeve; 24. Guide rod; 25. Friction layer; 26. Feed inlet; 27. Discharge outlet; 28. Guide slide rail. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] This application provides an automatic carding machine bobbin changing mechanism. Please refer to [link / reference]. Figures 1-8 The system includes a fixed base 1, a U-shaped material rack 2 on the fixed base 1, several vertically arranged guide rollers 3 rotatably connected to the U-shaped material rack 2, and a cotton sliver tube 4 on the U-shaped material rack 2. The cotton sliver tube 4 moves within the U-shaped material rack 2. The system is characterized in that a tube changing mechanism is provided at the center of the U-shaped material rack 2, and an auxiliary limiting mechanism is provided on the fixed base 1. The auxiliary limiting mechanism is located outside the center of the U-shaped material rack 2 and is used to provide auxiliary limiting for the cotton sliver tube 4 when winding the cotton sliver. The drum changing mechanism includes a drive motor 5, a drive wheel 6 mounted on the output shaft of the drive motor 5, an adjusting wheel 7 on the fixed base 1, a synchronous belt 8 connecting the adjusting wheel 7 and the drive wheel 6, two arc-shaped plates 9 sleeved on the output shaft of the drive motor 5, the synchronous belt 8 wrapped around the drive wheel 6, the adjusting wheel 7 and the two arc-shaped plates 9, the outer wall of the arc-shaped plates 9 fitting against the inner side of the synchronous belt 8, the arc-shaped plates 9 being hinged to the fixed base 1 through an elastic component 10, the drive wheel 6 rotating synchronously with the output shaft of the drive motor 5, and the arc-shaped plates 9 passively rotating around the output shaft; Under the action of the elastic component 10, the arc plate 9 is pushed outward, so that the synchronous belt 8 forms a circle. The outer wall of the synchronous belt 8 contacts the cotton sliver can 4, driving the cotton sliver can 4 to move within the U-shaped material rack 2. When the cotton sliver is wound, the adjusting wheel 7 moves, and the arc plate 9 rotates inward under the force of the synchronous belt 8. The synchronous belt 8 is deformed into an ellipse, and only the synchronous belt 8 section on the drive wheel 6 contacts the cotton sliver can 4, driving the cotton sliver can 4 to rotate.

[0023] In practical applications, under natural conditions, the elastic component 10 causes the two arc-shaped plates 9 to open outwards, thereby causing the synchronous belt 8 to open and form a circle. Canister changing process: When it is necessary to remove the fully loaded cotton swab can 4 from the U-shaped material rack 2, under the action of the elastic component 10, the two arc plates 9 are pushed outwards, and the synchronous belt 8 is pushed open by the arc plates 9 to form a circle. The outer wall of the synchronous belt 8 is in close contact with the outer wall of the cotton swab can 4. At the same time, the auxiliary limiting mechanism is away from the cotton swab can 4 and will not hinder the movement of the cotton swab can 4. The drive motor 5 starts to work, and the output shaft of the drive motor 5 drives the drive wheel 6 to rotate. The drive wheel 6 drives the cotton swab can 4 to move along the arc trajectory of the U-shaped material rack 2 through the synchronous belt 8. The outer wall of the cotton swab can 4 rolls and contacts the guide roller 3 to guide and limit the cotton swab can 4, so that the cotton swab 4 below the position of the coiled cotton swab is moved out, and the next cotton swab can 4 is moved to the position below the position of the coiled cotton swab. Winding process: When the sliver can 4 reaches the winding sliver position, the adjusting wheel 7 moves away from the drive wheel 6. When the adjusting wheel 7 moves, the timing belt 8 applies an inward force to the arc plate 9. The arc plate 9 overcomes the elastic force of the elastic component 10 and rotates inside the output axis of the drive motor 5. At this time, the timing belt 8 changes from a circle to an ellipse. Only the timing belt 8 section on the drive wheel 6 contacts the sliver can 4. At the same time, the auxiliary limiting mechanism moves to fit against the outer wall of the sliver can 4 to perform auxiliary limiting on the sliver can 4. The drive motor 5 starts to work. The output shaft of the drive motor 5 drives the drive wheel 6 to rotate. The timing belt 8 section on the drive wheel 6 drives the sliver can 4 to rotate in place. The sliver output by the carding machine is wound into the rotating sliver can 4. After winding is completed, the adjusting wheel 7 is reset, and under the action of the elastic component 10, the arc plate 9 is reset outward, the synchronous belt 8 returns to a circular state, and at the same time, the auxiliary limiting mechanism moves away from the cotton sliver can 4, so that the can be changed. Through the cooperation of the arc plate 9, the elastic component 10, and the adjusting wheel 7, the synchronous belt 8 can flexibly switch between circular and elliptical shapes, thereby realizing two functions on the same mechanism: changing cotton swabs and rotating and winding cotton swabs in place. The switching process is smooth and natural, without the need to stop the machine to adjust or replace the equipment, which improves the continuous operation efficiency of the equipment.

[0024] Refer to the instruction manual appendix Figure 3 Instruction manual attached Figure 4 Included with instruction manual Figure 5 The elastic component 10 includes a compression spring 11. A first fixed shaft 12 is fixedly connected to one end of the arc plate 9 away from the drive motor 5. A first connecting piece 13 is rotatably connected to the first fixed shaft 12. Two second fixed shafts 14 are installed on the fixed base 1. A second connecting piece 15 is rotatably connected to the second fixed shaft 14. The compression spring 11 is connected between the second connecting piece 15 and the first connecting piece 13.

[0025] In practical applications, under natural conditions, the compression spring 11 applies an outward pushing force to the first connecting member 13. This pushing force is transmitted to the arc plate 9 through the first fixed shaft 12, causing the arc plate 9 to expand outward and the synchronous belt 8 to expand into a circle.

[0026] Refer to the instruction manual appendix Figure 3 Instruction manual attached Figure 4 Included with instruction manual Figure 6 A first linear drive element 16 is installed on the fixed base 1. A sliding adjustment block 17 is fixedly connected to the output end of the first linear drive element 16. A guide rail 28 is connected to the surface of the fixed base 1. The sliding adjustment block 17 slides in cooperation with the guide rail 28. The adjustment wheel 7 is rotatably connected to the top of the sliding adjustment block 17.

[0027] In practical applications, when the synchronous belt 8 is transformed into an ellipse, the first linear drive element 16 starts to work. The first linear drive element 16 drives the sliding adjustment block 17 to move along the guide rail 28. The sliding adjustment block 17 drives the adjustment wheel 7 away from the drive wheel 6. The synchronous belt 8 applies an inward force to the arc plate 9. The arc plate 9 overcomes the elastic force of the elastic component 10 and rotates inside the output axis of the drive motor 5. At this time, the synchronous belt 8 is transformed from a circle into an ellipse. The guide rail 28 guides the sliding adjustment block 17 to avoid the position of the sliding adjustment block 17 and the adjustment wheel 7 from shifting.

[0028] Refer to the instruction manual appendix Figure 2 Instruction manual attached Figure 7 Included with instruction manual Figure 8 The auxiliary limiting mechanism includes a fixed side plate 18 fixedly installed on the fixed base 1. The fixed side plate 18 is located outside the center of the U-shaped material rack 2. A second linear drive element 19 is installed on the fixed side plate 18. A push plate 20 is fixedly connected to the telescopic end of the second linear drive element 19. A fixed frame 21 is installed on the push plate 20. An auxiliary roller 22 is rotatably connected to the fixed frame 21. When changing the sliver, the push plate 20 and the auxiliary roller 22 move away from the sliver can 4; when winding the sliver, the second linear drive element 19 pushes the push plate 20 to make the auxiliary roller 22 fit against the outer wall of the sliver can 4.

[0029] In practical applications, when the cotton sliver is coiled, the second linear drive element 19 starts to work. The output end of the second linear drive element 19 drives the push plate 20 to move towards the cotton sliver can 4, so that the auxiliary roller 22 on the fixed frame 21 is in contact with the outer wall of the cotton sliver can 4, and provides auxiliary positioning for the cotton sliver can 4. During the coiling process, the auxiliary roller 22 is always in contact with the outer wall of the cotton sliver can 4, preventing the cotton sliver can 4 from shifting or shaking, and improving the coiling quality of the cotton sliver.

[0030] Refer to the instruction manual appendix Figure 7 Included with instruction manual Figure 8 Several guide sleeves 23 are fixedly connected to the fixed side plate 18. Guide rods 24 are slidably connected inside the guide sleeves 23. One end of the guide rods 24 is fixedly connected to the push plate 20.

[0031] In practical applications, during the movement of the push plate 20, the push plate 20 drives the guide rod 24 to slide along the guide sleeve 23. The guide sleeve 23 and the guide rod 24 guide the push plate 20 to avoid tilting or deviating.

[0032] Refer to the instruction manual appendix Figure 3 Included with instruction manual Figure 4 The outer surface of the timing belt 8 is provided with a friction layer 25 to increase the friction between the timing belt 8 and the outer wall of the cotton sliver 4.

[0033] In practical applications, the friction layer 25 can be made of rubber or other materials with a high coefficient of friction. The friction layer 25 increases the friction between the synchronous belt 8 and the outer wall of the cotton sliver 4, ensuring that slippage does not occur during transmission.

[0034] Refer to the instruction manual appendix Figure 1 Included with instruction manual Figure 2 The guide rollers 3 are arranged along the inner arc direction of the U-shaped material frame 2. The roller surfaces of multiple guide rollers 3 together form a guiding and limiting surface for the outer wall of the cotton sliver tube 4. The outer wall of the cotton sliver tube 4 is in contact with the guide rollers 3. One end of the U-shaped material frame 2 is the feed inlet 26, and the other end of the U-shaped material frame 2 is the discharge outlet 27.

[0035] In practical applications, the cotton sliver can 4 enters the U-shaped material frame 2 through the feed port 26 and leaves the U-shaped material frame 2 through the discharge port 27. The guide roller 3 guides the cotton sliver can 4 to move along the U-shaped material frame 2, preventing it from deviating during the movement.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. An automatic carding machine carding mechanism, comprising a fixed base (1), a U-shaped material rack (2) on the fixed base (1), a plurality of vertically arranged guide rollers (3) rotatably connected to the U-shaped material rack (2), cotton sliver cans (4) on the U-shaped material rack (2), the cotton sliver cans (4) moving within the U-shaped material rack (2), characterized in that, The U-shaped material rack (2) is provided with a tube changing mechanism at its center, and the fixed base (1) is provided with an auxiliary limiting mechanism. The auxiliary limiting mechanism is located outside the center of the U-shaped material rack (2) and is used to assist in limiting the cotton sliver tube (4) when winding the cotton sliver. The cylinder changing mechanism includes a drive motor (5), a drive wheel (6) is mounted on the output shaft of the drive motor (5), an adjustment wheel (7) is provided on the fixed base (1), a synchronous belt (8) is connected between the adjustment wheel (7) and the drive wheel (6), two arc plates (9) are sleeved on the output shaft of the drive motor (5), the synchronous belt (8) is wound around the drive wheel (6), the adjustment wheel (7) and the two arc plates (9), the outer wall of the arc plate (9) is in contact with the inner side of the synchronous belt (8), the arc plate (9) is hinged to the fixed base (1) through an elastic component (10), the drive wheel (6) rotates synchronously with the output shaft of the drive motor (5), and the arc plate (9) passively rotates around the output shaft; Under the action of the elastic component (10), the arc plate (9) is pushed outward, so that the synchronous belt (8) forms a circle. The outer wall of the synchronous belt (8) contacts the cotton sliver can (4), driving the cotton sliver can (4) to move in the U-shaped material rack (2). When the cotton sliver is coiled, the adjusting wheel (7) moves, and the arc plate (9) rotates inward under the force of the synchronous belt (8). The synchronous belt (8) is deformed into an ellipse. Only the synchronous belt (8) section on the drive wheel (6) contacts the cotton sliver can (4), driving the cotton sliver can (4) to rotate.

2. The automatic carding machine changing mechanism according to claim 1, characterized in that, The elastic component (10) includes a compression spring (11). The end of the arc plate (9) away from the drive motor (5) is fixedly connected to a first fixed shaft (12). A first connecting piece (13) is rotatably connected to the first fixed shaft (12). Two second fixed shafts (14) are installed on the fixed base (1). A second connecting piece (15) is rotatably connected to the second fixed shaft (14). The compression spring (11) is connected between the second connecting piece (15) and the first connecting piece (13).

3. The automatic carding machine changing mechanism according to claim 1, characterized in that, A first linear drive element (16) is installed on the fixed base (1). A sliding adjustment block (17) is fixedly connected to the output end of the first linear drive element (16). A guide rail (28) is connected to the surface of the fixed base (1). The sliding adjustment block (17) is slidably engaged with the guide rail (28). The adjustment wheel (7) is rotatably connected to the top of the sliding adjustment block (17).

4. The automatic carding machine changing mechanism according to claim 1, characterized in that, Two arc-shaped plates (9) are symmetrically arranged on the inner side of the synchronous belt (8). The arc-shaped plates (9) are sleeved on the output shaft of the drive motor (5) and rotate around the output shaft of the drive motor (5).

5. The automatic carding machine changing mechanism according to claim 1, characterized in that, The auxiliary limiting mechanism includes a fixed side plate (18) fixedly installed on a fixed base (1). The fixed side plate (18) is located outside the center of the U-shaped material rack (2). A second linear drive element (19) is installed on the fixed side plate (18). A push plate (20) is fixedly connected to the telescopic end of the second linear drive element (19). A fixed frame (21) is installed on the push plate (20). An auxiliary roller (22) is rotatably connected to the fixed frame (21). When changing the sliver, the push plate (20) and the auxiliary roller (22) move away from the sliver spool (4); when winding the sliver, the second linear drive element (19) pushes the push plate (20) to make the auxiliary roller (22) fit against the outer wall of the sliver spool (4).

6. The automatic carding machine changing mechanism according to claim 5, characterized in that, A number of guide sleeves (23) are fixedly connected to the fixed side plate (18), and a guide rod (24) is slidably connected inside the guide sleeve (23). One end of the guide rod (24) is fixedly connected to the push plate (20).

7. The automatic carding machine changing mechanism according to claim 1, characterized in that, The outer surface of the synchronous belt (8) is provided with a friction layer (25) to increase the friction between the synchronous belt (8) and the outer wall of the cotton sliver tube (4).

8. The automatic carding machine changing mechanism according to claim 1, characterized in that, The guide rollers (3) are arranged along the inner arc direction of the U-shaped material rack (2). The roller surfaces of multiple guide rollers (3) together form a guiding and limiting surface for the outer wall of the cotton sliver tube (4). The outer wall of the cotton sliver tube (4) is in contact with the guide rollers (3). One end of the U-shaped material rack (2) is the feed inlet (26), and the other end of the U-shaped material rack (2) is the discharge outlet (27).

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