Napping roller and cloth napping machine

Abstract

This invention provides a napping roller and a fabric napping machine, comprising a roller, a mandrel, multiple racks, and a locking element. The roller is open at both ends, and its circumferential wall has multiple slits spaced apart and communicating with its inner cavity, each slit extending axially along the roller. The mandrel is coaxially inserted into the roller and used to connect to a rotary drive component. Both ends of the mandrel are rotatably engaged with the inner circumferential wall of the roller, and an annular cavity is formed between the outer circumferential wall of the mandrel and the inner circumferential wall of the roller. Multiple racks are spaced apart circumferentially within the annular cavity, each rack rotatably connected to the mandrel along its axial direction, and each rack extends out of the roller through one of the slits to form a toothed edge. The locking element is located between the roller and the mandrel to restrict the rotation of the roller relative to the mandrel. The napping roller and fabric napping machine provided by this invention reduce the difficulty of adjusting the rack wrap angle of the napping roller and improve the napping quality of the fabric.

Description

Technical Field

[0001] This invention belongs to the field of fabric processing technology, specifically relating to a napping roller and a fabric napping machine. Background Technology

[0002] Friction rollers are primarily used to enhance the surface texture and feel of fabrics. By using a friction roller to roughen the fabric surface, the softness and warmth of the fabric can be increased. Commonly used friction rollers include rigid rollers and flexible rollers. Currently, most rigid friction rollers use a method of setting a frosted layer on the roller surface. Considering the drawbacks of this type of friction roller, such as low lifespan and difficulty in adjusting the friction depth, a new type of rigid friction roller has been developed and used. The improvement lies in replacing the frosted layer with toothed racks with a fine tooth structure on the roller's peripheral wall. The characteristic of this is that these racks form a certain wrap angle on the roller surface (the tangential angle between the rack and its position on the roller edge). Different wrap angles result in different friction thicknesses, and the wrap angles of all racks must be consistent; otherwise, the friction effect and quality of the fabric will be affected.

[0003] In practical applications, it has been found that because each rack of the rigid abrasive roller is installed and adjusted independently, it is extremely difficult to adjust the rack to achieve the ideal wrap angle size and ensure the consistency of the wrap angle. This results in poor uniformity of fabric abrasion, affecting the quality of the final product, and a solution is urgently needed. Summary of the Invention

[0004] This invention provides a grinding roller, which aims to reduce the difficulty of adjusting the rack wrap angle of the grinding roller, improve the consistency of the rack wrap angle, and thus improve the grinding quality.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, a grinding roller is provided, comprising a roller, a mandrel, multiple racks, and a locking element; wherein, the roller is open at both ends and its circumferential wall has multiple slits spaced apart along its circumference, communicating with its inner cavity, each slit extending axially along the roller; the mandrel is coaxially inserted into the roller and used to connect a rotary drive component, both ends of the mandrel being rotatably engaged with the inner circumferential wall of the roller, and an annular cavity is formed between the outer circumferential wall of the mandrel and the inner circumferential wall of the roller; multiple racks are spaced apart circumferentially within the annular cavity, each rack being rotatably connected to the mandrel along its axial direction, and each rack correspondingly extending out of the roller through one of the slits to form a toothed grinding edge; the locking element is disposed between the roller and the mandrel, having a locked state restricting the rotation of the roller relative to the mandrel, and also having an unlocked state suitable for the rotation of the roller relative to the mandrel.

[0006] In conjunction with the first aspect, in one possible implementation, end caps are provided at both ends of the mandrel, and connecting sleeves are provided on the opposite sides of the two end caps. The two connecting sleeves are rotatably engaged with the inner peripheral walls of both ends of the roller. One of the locking elements is slidably fitted onto the two connecting sleeves along their axial direction. The peripheral wall of the locking element is a toothed surface. Locking tooth sections are provided on the inner peripheral walls of both ends of the roller. When the locking element slides to the point where the toothed surface engages with the locking tooth section, a locking state is formed. When the locking element slides to the point where the toothed surface separates from the locking tooth section, an unlocking state is formed.

[0007] In some embodiments, the two connecting sleeves are respectively connected to caps at opposite ends, and the two caps are each provided with multiple adjusting rods spaced apart along their respective circumferences. The adjusting rods are screwed into the caps, and one end of each adjusting rod passes through the cap and is rotatably connected to the locking member.

[0008] For example, each rack is provided with a connecting shaft extending axially along the spindle, and the two ends of the connecting shaft pass through one of the end caps and form a rotational engagement with the end cap.

[0009] For example, the connecting shaft forms a sliding fit with both end caps along its axial direction, and a sliding drive seat is rotatably connected inside each of the two connecting sleeves. The sliding drive seat is fixedly connected to the frame and slides against the ends of each connecting shaft. During the rotation of each rack with the spindle, each rack reciprocates axially with its connecting shaft under the pushing action of the two sliding drive seats.

[0010] In one possible implementation, the two sliding drive seats have annular corrugated raceways on their sidewalls that are close to each other, and the connecting shaft has balls that roll into contact with the corrugated raceways at both ends through which it passes.

[0011] In some embodiments, elastic elements are fitted at the portions where the connecting shaft passes through the two end caps, with one end of the elastic element connected to the connecting shaft and the other end abutting against the end cap.

[0012] For example, a drive shaft is fixedly inserted through the center of each of the two end caps. The two drive shafts pass through two sliding drive seats and are rotatably connected to the frame. The two drive shafts are rotatably connected to one of the sliding drive seats, and one of the drive shafts is connected to the output end of the rotary drive component.

[0013] For example, one of the sidewalls along the circumference of the roller is called the first sidewall, and the sidewall opposite the first sidewall is called the second sidewall; wherein, the first sidewall is parallel to the radial direction of the roller, and the second sidewall is set at an angle to the first sidewall.

[0014] The beneficial effects of the abrasive roller provided by this invention are as follows: Compared with the prior art, the abrasive roller of this invention has a mandrel coaxially arranged inside the roller and connected to each rack. When the locking device is in the unlocked state, the relative rotation of the mandrel and the roller can make each rack swing synchronously, thereby adjusting the wrap angle between each rack and the roller wall. After adjustment, the relative rotational freedom between the roller and the mandrel can be relocked by the locking device, thereby meeting the usage requirements of different abrasive thicknesses and improving the versatility of the abrasive roller. Compared with the conventional independent installation and adjustment method of racks, it not only greatly reduces the difficulty of adjusting the wrap angle of the racks, but also ensures the consistency of the wrap angle of each rack, thereby improving the uniformity of the abrasive edge of the fabric, improving the abrasive effect and product quality.

[0015] Secondly, embodiments of the present invention also provide a fabric napping machine, including the aforementioned napping roller.

[0016] Compared with the prior art, the fabric napping machine provided by this invention adopts the above-mentioned napping roller, which can meet the application requirements of different napping thicknesses. Moreover, the adjustment of the rack wrap angle is simple and convenient, and the wrap angle of each rack is highly consistent. Therefore, it can improve the napping uniformity of the fabric, improve the napping effect and product quality. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of the abrasive roller provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the cross-sectional structure of the abrasive roller provided in an embodiment of the present invention;

[0019] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0020] Figure 4 This is a cross-sectional view of the abrasive roller (end) provided in an embodiment of the present invention;

[0021] Figure 5 for Figure 4 A magnified schematic diagram of the local structure at point B;

[0022] Figure 6 An exploded view of the abrasive roller (with its end cut open) provided in an embodiment of the present invention;

[0023] Figure 7 This is a three-dimensional structural diagram of the sliding drive seat used in an embodiment of the present invention.

[0024] In the diagram: 10, roller; 101, slit opening; 1011, first side wall; 1012, second side wall; 102, locking tooth section; 20, mandrel; 200, annular cavity; 21, end cover; 22, connecting sleeve; 23, sealing cover; 231, adjusting rod; 24, sliding drive seat; 241, corrugated raceway; 25, drive shaft; 26, slide; 30, rack; 300, toothed edge grinding; 31, connecting shaft; 311, ball bearing; 312, elastic element; 32, spring plate; 40, locking element; 400, toothed surface; 50, frame. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0027] Please refer to the following: Figures 1 to 7The present invention will now describe the abrasive roller provided. The abrasive roller includes a roller 10, a spindle 20, multiple racks 30, and a locking member 40. The roller 10 has open ends and multiple slits 101 communicating with its inner cavity are distributed circumferentially along its peripheral wall, each slit 101 extending axially along the roller 10. The spindle 20 is coaxially inserted into the roller 10 and used to connect to a rotary drive component. Both ends of the spindle 20 are rotatably engaged with the inner peripheral wall of the roller 10, and the outer peripheral wall of the middle portion of the spindle 20 forms a gap with the inner peripheral wall of the roller 10. A ring cavity 200 is formed; multiple racks 30 are distributed circumferentially within the ring cavity 200, each rack 30 is rotatably connected to the spindle 20 along the axial direction of the spindle 20, and each rack 30 extends out of the roller 10 through one of the slots 101 and forms a toothed edge 300; a locking member 40 is provided between the roller 10 and the spindle 20, having a locking state that restricts the rotation of the roller 10 relative to the spindle 20, and also having an unlocking state suitable for the rotation of the roller 10 relative to the spindle 20.

[0028] It should be noted that in this embodiment, each rack 30 is rotatably connected to the spindle 20, and simultaneously cooperates with the slots 101 through which they pass. The slots 101 constrain the relative position of each rack 30 and the roller 10. Therefore, when the spindle 20 and the roller 10 rotate relative to each other, each rack 30 synchronously changes its radial tilt angle relative to the roller 10. This not only enables the uniform adjustment of the wrap angle of each rack 30 and the roller 10, but also ensures the consistency of the wrap angle of each rack 30. Of course, it should be noted that the width of the slot 101 should match the thickness of the rack 30, and the slot 101 should have a trapezoidal cross-section structure. The two sides of the slot 101 along the circumference of the roller 10 form line contact with the two side walls of the rack 30, thereby ensuring the constraint effect of the slot 101 on the rack 30, and ensuring that the rack 30 can swing along the circumference of the roller 10.

[0029] It should be understood that during normal grinding operations, the locking component 40 should be in a locked state to ensure that the roller 10 can rotate together with the spindle 20, thereby ensuring the stable connection of each rack 30. Specifically, the locking component 40 can be a set screw that passes through the roller 10, which abuts against the spindle 20 to form a locking state. Alternatively, the locking component 40 can be a pin that passes through the roller 10, with multiple insertion holes corresponding to the peripheral wall of the spindle 20. The pin is inserted into one of the insertion holes to form a locking state. Of course, the locking component 40 can also be other components, as long as they can enable the roller 10 and the spindle 20 to move together to form a locking state and to move separately to obtain an unlocked state.

[0030] It should be emphasized that fabric napping machines are usually equipped with a fabric tensioning mechanism, which can ensure the stability of the tension during the fabric napping process. Therefore, although the napping roller provided in this embodiment will produce a change in the diameter of the napping boundary (i.e. the circular trajectory formed by the toothed edges 300 of each toothed rack 30) when adjusting the wrap angle of the rack 30, the fabric tensioning mechanism can adaptively adjust the tension of the fabric, thereby ensuring that the contact force between each toothed edge 300 and the fabric tends to be consistent before and after the wrap angle adjustment.

[0031] Compared with the prior art, the abrasive roller provided in this embodiment has a mandrel 20 coaxially arranged inside the roller 10 and connected to each rack 30. When the locking member 40 is in the unlocked state, the relative rotation of the mandrel 20 and the roller 10 can make each rack 30 swing synchronously, thereby adjusting the wrap angle between each rack 30 and the peripheral wall of the roller 10. After adjustment, the relative rotational freedom between the roller 10 and the mandrel 20 can be relocked by the locking member 40, thereby meeting the usage requirements of different abrasive thicknesses and improving the versatility of the abrasive roller. Compared with the conventional method of independently installing and adjusting the rack 30, it not only greatly reduces the difficulty of adjusting the wrap angle of the rack 30, but also ensures the consistency of the wrap angle of each rack 30, thereby improving the uniformity of the abrasive edge 300 on the fabric, improving the abrasive effect and product quality.

[0032] In some embodiments, see Figures 4 to 6 The mandrel 20 has end caps 21 at both ends. The two end caps 21 are respectively provided with connecting sleeves 22 on opposite sides. The two connecting sleeves 22 are rotatably engaged with the inner peripheral walls of the two ends of the roller 10. The two connecting sleeves 22 are respectively slidably fitted with one of the locking members 40 along their axial direction. The peripheral wall of the locking member 40 is a toothed surface 400. The inner peripheral walls of both ends of the roller 10 are provided with locking tooth sections 102. When the locking member 40 slides to the point where the toothed surface 400 engages with the locking tooth section 102, it forms a locked state. When the locking member 40 slides to the point where the toothed surface 400 separates from the locking tooth section 102, it forms an unlocked state.

[0033] By setting end caps 21 and connecting sleeves 22, mating surfaces with increased diameters can be formed at both ends of the spindle 20. On the one hand, these mating surfaces can be used to form a rotational fit with the inner circumferential wall of the roller 10. Specifically, a bearing can be fitted on the outer circumference of the connecting sleeve 22 and embedded inside the roller 10. On the other hand, it can ensure that the annular cavity 200 is formed between the middle part of the spindle 20 and the inner circumferential wall of the roller 10, ensuring that each rack 30 has sufficient swing space along the circumference of the roller 10.

[0034] The locking member 40 and the outer peripheral wall of the connecting sleeve 22 can be circumferentially slidably fitted by a spline engagement. When the locking member 40 slides on the connecting sleeve 22 until its outer peripheral wall, which serves as the toothed surface 400, engages with the locking tooth section 102 of the inner peripheral wall of the roller 10, the roller 10 can rotate together with the spindle 20 through the transition connection of the locking member 40. When it is necessary to adjust the wrap angle of the rack 30, simply slide the locking member 40 so that the toothed surface 400 slides out of the locking tooth section 102. After adjustment, slide the locking member 40 again until the toothed surface 400 engages with the locking tooth section 102. The operation is simple and convenient, and the adjustment is labor-saving and efficient.

[0035] It should be explained that, in order to achieve a relatively smooth adjustment range for the rack 30, the tooth profiles of the tooth surface 400 and the locking tooth section 102 are made as small as possible; at the same time, in order to reduce the difficulty and cost of processing, the tooth surface 400 and the locking tooth section 102 can both adopt a non-continuous multi-segment arc tooth ring combination method, rather than necessarily adopting a full circle tooth distribution method.

[0036] For some possible implementations, please refer to [link / reference]. Figure 2 , Figures 4 to 6 Two connecting sleeves 22 are connected to a cover 23 at opposite ends. Each of the two covers 23 has multiple adjusting rods 231 spaced apart along its circumference. The adjusting rods 231 are screwed into the cover 23, and one end of each adjusting rod 231 passes through the cover 23 and is rotatably connected to the locking member 40.

[0037] The cover 23 and the connecting sleeve 22 are detachably connected, such as by screw fixing, which makes it easy to remove the cover 23 and assemble the locking part 40. Here, by synchronously rotating each adjusting rod 231, the locking part 40 can be driven to slide along the axis of the connecting sleeve 22, thereby switching the unlocked and locked states of the locking part 40. The operation is simple and labor-saving.

[0038] Furthermore, a spring (not shown in the figure) can be fitted onto the adjusting rod 231 between the locking member 40 and the cover 23. The spring provides elastic support to the locking member 40, thereby preventing axial wobbling of the locking member 40 due to assembly gaps and improving connection stability. In addition, to avoid the problem of synchronous rotation of the adjusting rods 231, the adjusting rods 231 can slide through the cover 23 and be screwed with lock nuts. By tightening each lock nut in sequence, the locking member 40 can be moved by the adjusting rod 231. By loosening each lock nut in sequence, the locking member 40 can be moved in the opposite direction by the spring. This completes the state switching of the locking member 40 and reduces the difficulty of operation.

[0039] It should be noted that, see Figure 4 and Figure 5Each of the aforementioned racks 30 is provided with a connecting shaft 31 extending axially along the spindle 20. The two ends of the connecting shaft 31 pass through one of the end caps 21 respectively and form a rotatable engagement with the end cap 21. That is to say, the rack 30 is located between the two end caps 21. The connecting shaft 31 can be a long shaft that passes through the rack 30 as a whole, or it can be two short shafts that are fixedly connected to the two ends of the rack 30 respectively. The rack 30 can be rotatably connected by passing the connecting shaft 31 through the shaft hole opened on the end cap 21. The structure is simple and stable.

[0040] To improve the stability of each rack 30 and the overall structural integrity of each rack 30, such as Figure 2 As shown, each of the adjacent racks 30 is connected by a V-shaped or arc-shaped spring plate 32. The racks 30 are connected by the spring plates 32, thereby improving the coordination of the actions of each rack 30 when adjusting the wrap angle of the racks 30, and at the same time improving the connection stability of the racks 30.

[0041] To further improve the fabric napping effect and product quality, please refer to [link / reference]. Figures 4 to 7 The connecting shaft 31 forms a sliding fit with both end caps 21 along its axial direction. Each of the two connecting sleeves 22 is rotatably connected to a sliding drive seat 24. The sliding drive seat 24 is fixedly connected to the frame 50 and slides against the ends of each connecting shaft 31. During the rotation of each rack 30 with the spindle 20, each rack 30 swings axially with its connecting shaft 31 under the pushing action of the two sliding drive seats 24.

[0042] It should be explained that the axially fixed rack 30 is prone to forming straight streaks on the surface of the fabric during the napping process, thus affecting the napping quality. Here, by utilizing the relative rotation of the spindle 20 and the sliding drive seat 24 fixed on the frame 50, each rack 30 can reciprocate along the axial direction of the spindle 20. This not only allows the toothed edges 300 of each rack 30 to continuously generate axial cross-dislocation, thereby eliminating straight streaks in the fabric napping process, but also transforms the simple relative motion between the toothed edges 300 and the fabric from the tangential direction of the roller 10 into a mixed frictional motion combining tangential and axial motion, thereby improving the napping uniformity and enhancing product quality.

[0043] Optionally, see Figure 7In this embodiment, the two sliding drive seats 24 are provided with annular corrugated raceways 241 on their sidewalls that are close to each other. The two ends of the connecting shaft 31 passing through the two end caps 21 are provided with balls 311 that roll in contact with the corrugated raceways 241. By utilizing the rolling engagement between the balls 311 at the shaft end of the connecting shaft 31 and the annular corrugated raceways 241, the rack 30 can reciprocate under the pushing action of the corrugated raceways 241 along the axial direction of the spindle 20 during the rotation of the spindle 20 relative to the sliding drive seat 24. The structure is simple and stable, and no additional driving force is required. It can be achieved using the internal space of the connecting sleeve 22, thereby ensuring the overall compactness of the grinding roller structure.

[0044] like Figure 4 As shown, elastic elements 312 are fitted at the portions of the connecting shaft 31 that pass through the two end caps 21. One end of the elastic element 312 is connected to the connecting shaft 31, and the other end abuts against the end cap 21. By setting the elastic element 312, the axial swing of the rack 30 can be assisted, preventing the balls 311 from jamming with the corrugated raceway 241, thereby improving operational stability.

[0045] It is important to understand that you should refer to [the relevant documentation / reference]. Figure 4 In this embodiment, a drive shaft 25 is fixedly inserted through the center of each of the two end caps 21. The two drive shafts 25 pass through the two sliding drive seats 24 respectively and are rotatably connected to the frame 50. The two drive shafts 25 are rotatably connected to one of the sliding drive seats 24 respectively, and one of the drive shafts 25 is connected to the output end of the rotary drive component.

[0046] The drive shaft 25 and the end cover 21 are connected by a key to ensure that the output end of the rotary drive component, such as the motor, can transmit torque to the spindle 20. At the same time, the drive shaft 25 and the sliding drive seat 24 are rotated together by bearings. Based on the fixed connection between the sliding drive seat 24 and the frame 50, the drive shaft 25 can be directly rotatably connected to the frame 50. At the same time, one of the drive shafts 25 is connected to the output end of the rotary drive component. The torque transmission structure is simple, compact and highly reliable.

[0047] For example, please see Figure 3 One of the sidewalls of the slit 101 along the circumference of the roller 10 is the first sidewall 1011, and the sidewall opposite to the slit 101 and the first sidewall 1011 is the second sidewall 1012; wherein, the first sidewall 1011 is parallel to the radial direction of the roller 10, and the second sidewall 1012 is set at an angle to the first sidewall 1011.

[0048] When the rack 30 is in contact with the first side wall 1011, it forms a state that extends radially along the roller 10. At this time, the wrap angle of the rack 30 is ninety degrees. When the rack 30 is in contact with the second side wall 1012, it forms an inclined state. Here, the second side wall 1012 and the first side wall 1011 can be set to thirty degrees, thereby making the wrap angle adjustment range of the rack 30 from sixty degrees to ninety degrees.

[0049] It should be explained that the cross-section of the seam 101 is a right trapezoid. Considering the constraint force of the seam 101 on the rack 30, the top edge of the first side wall 1011, which is the right-angle side of the seam 101, can be chamfered so that the chamfered edge and the top edge of the second side wall 1012 abut against the two side walls of the rack 30 respectively. This can ensure the constraint of the seam 101 on the rack 30 and prevent the seam 101 from interfering with the swing of the rack 30.

[0050] It should be noted that, based on the above, if Figure 1 As shown, two drive shafts 25 are rotatably connected to slide blocks 26 respectively. The two slide blocks 26 are slidably connected to the slide rails on both sides of the frame 50. The height of the abrasive roller can be adjusted by sliding the slide blocks 26 up and down along the slide rails, thereby adjusting the wrap angle between the fabric and the abrasive roller.

[0051] Specifically, in order to improve the vertical sliding adjustment accuracy of the slide block 26 and avoid the situation where the heights of the two ends of the abrasive roller are different, resulting in tension deviation on both sides of the fabric, in this embodiment, two vertical screws are provided on the two slide blocks 26 respectively. The two vertical screws pass through the adjustment seats on both sides of the frame 50 and are screwed with adjustment nuts. By turning the adjustment nuts, the vertical screws drive the slide blocks 26 to move. The threaded engagement between the vertical screws and the adjustment nuts can ensure the consistency of the vertical sliding displacement of the two slide blocks 26.

[0052] Based on the same inventive concept, combined with Figures 1 to 7 It is understood that this application also provides a fabric napping machine, including the above-mentioned napping roller.

[0053] Compared with the prior art, the fabric napping machine provided in this embodiment adopts the above-mentioned napping roller, which can meet the application requirements of different napping thicknesses. Moreover, the adjustment of the rack wrap angle is simple and convenient, and the wrap angle of each rack is highly consistent. Therefore, it can improve the napping uniformity of the fabric, improve the napping effect and product quality.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sanding roller, characterized in that, include: The roller is open at both ends and has multiple slits that communicate with its inner cavity distributed at intervals along its circumference. Each slit extends along the axial direction of the roller. One of the side walls of the slit along the circumference of the roller is a first side wall, and the side wall opposite to the first side wall is a second side wall. The first side wall is parallel to the radial direction of the roller, and the second side wall is set at an angle to the first side wall. A mandrel is coaxially inserted inside the roller and used to connect a rotary drive component. The two ends of the mandrel are respectively rotatably engaged with the inner circumferential wall of the roller, and an annular cavity is formed between the outer circumferential wall of the middle part of the mandrel and the inner circumferential wall of the roller. Multiple racks are spaced apart in the annular cavity along the circumference of the mandrel. Each rack is rotatably connected to the mandrel along the axial direction of the mandrel, and each rack extends out of the roller through one of the slots to form a toothed edge. A locking member is disposed between the roller and the spindle, having a locking state that restricts the rotation of the roller relative to the spindle, and an unlocking state suitable for the rotation of the roller relative to the spindle; wherein, the peripheral wall of the locking member is a toothed surface, and both ends of the roller have locking tooth segments on their inner peripheral walls, the locking state is formed when the locking member slides to the point where the toothed surface engages with the locking tooth segments, and the unlocking state is formed when the locking member slides to the point where the toothed surface separates from the locking tooth segments.

2. The abrasive roller as described in claim 1, characterized in that, The mandrel is provided with end caps at both ends, and connecting sleeves are provided on the opposite sides of the two end caps. The two connecting sleeves are rotatably engaged with the inner circumferential walls of the two ends of the roller, and one of the locking elements is slidably sleeved on the two connecting sleeves along their axial direction.

3. The abrasive roller as described in claim 2, characterized in that, The two connecting sleeves are connected to caps at opposite ends. Each cap has multiple adjusting rods spaced apart along its circumference. The adjusting rods are screwed to the caps, and one end of each adjusting rod passes through the cap and is rotatably connected to the locking member.

4. The abrasive roller as described in claim 2, characterized in that, Each of the racks is provided with a connecting shaft extending axially along the spindle, and the two ends of the connecting shaft pass through one of the end caps and form a rotational engagement with the end cap.

5. The abrasive roller as described in claim 4, characterized in that, The connecting shaft slides along its axial direction with both end caps. Each of the two connecting sleeves is rotatably connected to a sliding drive seat. The sliding drive seat is fixedly connected to the frame and slides against the ends of each connecting shaft. During the rotation of each rack with the spindle, each rack reciprocates axially with its connecting shaft under the pushing action of the two sliding drive seats.

6. The abrasive roller as described in claim 5, characterized in that, Both of the two sliding drive seats have annular corrugated raceways on their sidewalls that are close to each other, and both ends of the connecting shaft that pass through the two end caps have balls that roll into contact with the corrugated raceways.

7. The abrasive roller as described in claim 6, characterized in that, The portion of the connecting shaft that passes through the two end caps is fitted with an elastic element, one end of which is connected to the connecting shaft and the other end of which abuts against the end cap.

8. The abrasive roller as described in claim 5, characterized in that, A drive shaft is fixedly inserted through the center of each of the two end caps. The two drive shafts pass through the two sliding drive seats and are rotatably connected to the frame. The two drive shafts are rotatably connected to one of the sliding drive seats. One of the drive shafts is connected to the output end of the rotary drive component.

9. A fabric brushing machine, characterized in that, Includes the abrasive roller as described in any one of claims 1-8.

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