Woven cloth friction testing machine

Abstract

The invention relates to the technical field of textile detection equipment, in particular to a woven fabric friction testing machine which comprises a testing machine body and a butterfly plate arranged on the testing machine body, a rotating shaft is mounted on the butterfly plate, a mounting seat is arranged at one end of the rotating shaft, and the woven fabric friction testing machine further comprises multiple groups of friction columns slidably arranged in the butterfly plate. One end of each friction column penetrates through the butterfly plate, makes contact with the rotating shaft and is used for applying variable friction resistance to the rotating shaft, the problem of uneven friction caused by traditional passive rotation is eliminated to a certain degree by actively regulating and controlling the contact pressure gradient, and the abrasion exposure degree difference is reduced; the test device can actively drive the test fabric to periodically rotate by a certain angle in cooperation with a resistance-drive seamless switching mechanism, the problem of uneven friction is further reduced, meanwhile, the state of the rotating shaft is switched through program control, specifically, low resistance, high resistance and autonomous rotation are switched, and then the diversity of device testing is improved.

Description

Technical Field

[0001] This invention relates to the field of textile testing equipment technology, specifically a fabric friction tester. Background Technology

[0002] In the current design of the Martindale abrasion tester, the core motion mechanism drives the mounting base and fabric to reciprocate along a Lissajous figure via a butterfly plate to simulate multidirectional friction effects in actual working conditions. However, due to the fixed nature of the butterfly plate's motion trajectory, the contact area between the fabric and the abrasive tends to exhibit a fixed distribution. Furthermore, factors such as differences in abrasive surface smoothness, fabric tension fluctuations, or material anisotropy can lead to localized changes in the coefficient of friction, easily causing specific areas to continuously experience high-intensity friction while other areas are not adequately tested. This non-uniformity of friction distribution results in inaccurate localized abrasion performance, making it difficult to objectively assess the overall abrasion resistance of the fabric.

[0003] To address this issue, existing technologies generally employ a design that connects the mounting base and the butterfly plate via a rotating shaft. Specifically, the mounting base is connected to the butterfly plate via a rotating shaft, allowing the fabric to rotate at a certain angle as it follows the butterfly plate's movement, utilizing the dynamic changes in friction. When the fabric comes into contact with the abrasive, the uneven frictional forces on both sides due to differences in the coefficient of friction and pressure distribution across the contact surface generate torque, driving the fabric to rotate around the rotating shaft. This rotational design ensures that different areas of the fabric periodically enter high-friction zones, effectively preventing localized wear failure caused by track solidification and improving the spatial uniformity of abrasion resistance testing.

[0004] However, this design also introduces new problems: the rotation of the fabric depends on the unevenness of friction on both sides, and this unevenness itself is random and uncontrollable. For example, if the abrasive surface is uneven or there are differences in tension distribution within the fabric itself, some areas will frequently contact the abrasive during rotation, while other areas will have a lower contact frequency, ultimately leading to uneven friction on the fabric test surface to some extent. Furthermore, the rotation angle and speed are affected by changes in friction force and are difficult to control precisely, further exacerbating the dispersion of test results and reducing the repeatability and accuracy of the experiment. Therefore, we propose a fabric friction testing machine. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a fabric friction testing machine, comprising a main body and a butterfly plate mounted thereon. A rotating shaft is mounted on the butterfly plate, and a mounting base is provided at one end of the rotating shaft. The machine also includes multiple sets of friction columns slidably disposed within the butterfly plate, with each set of friction columns evenly distributed around the rotating shaft. Each set of friction columns passes through the butterfly plate and contacts the rotating shaft, applying variable frictional resistance to the rotating shaft. A rotating ring is rotatably connected within the butterfly plate, and a transmission component is provided within the butterfly plate. The friction columns are connected to the rotating ring via the transmission component. During the rotation of the rotating ring, the transmission component gradually increases the pressure exerted by the friction columns on the rotating shaft. Once the pressure reaches a certain value, the friction columns rotate, thereby causing the rotating shaft and mounting base to rotate actively.

[0006] In some embodiments, the transmission component includes a hollow column fixedly connected to the butterfly plate, one end of the rotating shaft slidingly passing through the hollow column, a hollow shaft fixedly connected to the rotating ring, the hollow column passing through the hollow shaft and rotatably connected thereto, and an annular plate provided inside the butterfly plate, with the friction column slidably connected to the annular plate.

[0007] A rectangular groove is formed inside the friction column, and a sliding block is slidably connected inside the rectangular groove. A cylinder is fixedly connected to one end of the sliding block, and a guide groove is formed on the friction column. One end of the cylinder slides through the guide groove, and a hole is formed at one end of the sliding block. A spring is fixedly connected inside the hole, and one end of the spring is fixed to the inner wall of the rectangular groove. When the cylinder is pushed, the spring is squeezed to provide the friction column with the squeezing force to squeeze the rotating shaft.

[0008] Furthermore, an arc-shaped groove is provided on the rotating ring, and one end of the cylinder passes through the arc-shaped groove and is slidably connected to its inner wall. When the rotating ring is rotated, the cylinder is moved by pushing it with the arc-shaped groove.

[0009] In some embodiments, an annular mounting plate is fixedly connected to the butterfly plate, and a hollow column II is fixedly connected to the annular mounting plate. One end of the rotating shaft also slides through the hollow column II. A flexible friction ring is fixedly connected to the hollow column II, and a friction ring is installed at the bottom of the annular plate. The friction ring is in close contact with the flexible friction ring to provide frictional resistance for the rotation of the annular plate.

[0010] In some embodiments, an outer gear ring 1 is fixedly connected to the rotating ring, an outer gear ring 2 that meshes with multiple outer gear ring 1s is rotatably connected inside the butterfly plate, a drive motor is fixedly connected to the butterfly plate, and a gear disk that meshes with the outer gear ring 2s is fixedly connected to the output shaft of the drive motor. Starting the drive motor drives multiple rotating rings to rotate.

[0011] In some embodiments, a sliding groove is provided on the annular plate, and a rectangular plate is fixedly connected to one end of the friction column. One end of the rectangular plate passes through the sliding groove and is slidably connected to its inner wall to guide and limit the movement of the friction column.

[0012] In some embodiments, a connecting plate is fixedly connected to the friction ring, and a shaft is rotatably connected to the connecting plate. A guide groove is provided on the rectangular plate, and one end of the shaft is located in the guide groove. This is used to move the rectangular plate during the process of pushing the friction column to move, so as to use the guide groove to drive the shaft to move upward, thereby causing the friction ring to detach from the flexible friction ring.

[0013] In some embodiments, the guide groove includes a straight slide groove formed on a rectangular plate, one end of the shaft is located in the straight slide groove and is slidably connected to its inner wall, and an oblique slide groove communicating with the straight slide groove is formed on the rectangular plate.

[0014] In some embodiments, a connecting pipe is fixedly connected to the mounting base, one end of the rotating shaft is located inside the connecting pipe, and a sliding protrusion is fixedly connected to the inner wall of the connecting pipe. A sliding groove is opened at one end of the rotating shaft, and one end of the sliding protrusion is located inside the sliding groove and slidably connected to its inner wall.

[0015] This invention has at least the following beneficial effects:

[0016] This device actively adjusts the contact pressure gradient to eliminate, to some extent, the uneven friction caused by traditional passive rotation, reducing the difference in wear exposure. Combined with the resistance-drive seamless switching mechanism, it can actively drive the test fabric to rotate periodically at a certain angle, further reducing the uneven friction problem. At the same time, the state of the rotating shaft is switched by program control, specifically from low resistance to high resistance to autonomous rotation, thereby improving the diversity of the device's tests. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the butterfly plate structure of the present invention;

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of partial cross-section;

[0020] Figure 4 For the present invention Figure 3 Schematic diagram of partial cross-section;

[0021] Figure 5 For the present invention Figure 4 Schematic diagram of partial cross-section;

[0022] Figure 6 For the present invention Figure 5Schematic diagram of partial cross-section;

[0023] Figure 7 For the present invention Figure 6 Schematic diagram of partial cross-section;

[0024] Figure 8 For the present invention Figure 7 Schematic diagram of partial cross-section.

[0025] In the diagram: 1-Main body of the testing machine; 11-Butterfly plate; 12-Rotating shaft; 13-Mounting base; 2-Friction column; 3-Rotating ring; 4-Transmission component; 41-Hollow column one; 42-Hollow shaft one; 43-Annular plate; 44-Rectangular groove; 45-Sliding block; 46-Cylinder; 47-Guide groove; 48-Hole; 49-Spring; 51-Arc groove; 52-Annular mounting plate; 53-Hollow column two; 54-Flexible friction ring; 55-Friction ring; 56-External gear ring one; 57-External gear ring two; 58-Drive motor; 59-Gear disc; 61-Sliding groove; 62-Rectangular plate; 63-Connecting plate; 64-Shaft two; 65-Guide groove component; 66-Straight sliding groove; 67-Slanted sliding groove; 68-Connecting pipe; 69-Sliding protrusion; 71-Sliding groove. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-8 This invention provides a technical solution: a fabric friction testing machine, comprising a testing machine body 1 and a butterfly plate 11 disposed thereon, a rotating shaft 12 mounted on the butterfly plate 11, a mounting base 13 disposed at one end of the rotating shaft 12, the mounting base 13 being used to mount the fabric to be tested, and further comprising:

[0028] Multiple sets of friction columns 2 are slidably arranged inside the butterfly plate 11, and each set of friction columns 2 is evenly arranged around the rotating shaft 12, with one end passing through the butterfly plate 11 and contacting the rotating shaft 12, for applying variable frictional resistance to the rotating shaft 12. The contact end of the friction column 2 with the rotating shaft 12 adopts an arc design to fit the surface of the rotating shaft 12, and the surface of the contact end of the friction column 2 with the rotating shaft 12 is designed with rubber material.

[0029] Rotating ring 3 is rotatably set inside butterfly plate 11 and connected to friction column 2;

[0030] The transmission component 4 is set inside the butterfly plate 11, and the friction column 2 is connected to the rotating ring 3 through the transmission component 4. During the rotation of the rotating ring 3, the transmission component 4 is used to make the friction column 2 gradually increase the squeezing force on the rotating shaft 12. After the squeezing force increases to a certain value, it drives the friction column 2 to rotate, so as to drive the rotating shaft 12 and the mounting base 13 to rotate actively.

[0031] Specifically, this device employs multiple sets of evenly distributed friction columns 2 and a drive system. By actively adjusting the contact pressure gradient, it can eliminate the uneven friction caused by traditional passive rotation to a certain extent, reducing the difference in wear exposure. Combined with a resistance-drive seamless switching mechanism, it can actively drive the test fabric to rotate periodically at a certain angle, further reducing the problem of uneven friction. At the same time, the state of the rotating shaft 12 is switched through program control, specifically from low resistance to high resistance to autonomous rotation, thereby improving the diversity of the device's tests.

[0032] The transmission component 4 includes a hollow column 41 fixedly connected to the butterfly plate 11, one end of the rotating shaft 12 slidingly passing through the hollow column 41, a hollow shaft 42 fixedly connected to the rotating ring 3, the hollow column 41 passing through the hollow shaft 42 and rotatably connected to it, and an annular plate 43 is provided inside the butterfly plate 11, and the friction column 2 is slidably connected to the annular plate 43.

[0033] A rectangular groove 44 is provided inside the friction column 2. A sliding block 45 is slidably connected inside the rectangular groove 44. A cylinder 46 is fixedly connected to one end of the sliding block 45. A guide groove 47 is provided on the friction column 2. One end of the cylinder 46 slides through the guide groove 47. A hole 48 is provided at one end of the sliding block 45. A spring 49 is fixedly connected inside the hole 48. One end of the spring 49 is fixedly connected to the inner wall of the rectangular groove 44.

[0034] Specifically, after the rotating shaft 12 is installed into the hollow column 41, its outer wall contacts the end of the friction column 2 to form a limit. When the sliding block 45 is pushed, due to the obstruction of the rotating shaft 12, the sliding block 45 can only slide along the axial direction of the friction column 2. This movement compresses the preset spring 49 and produces elastic deformation. The deformation of the spring 49 is mechanically transmitted to make the end of the friction column 2 apply a preset radial compressive force to the rotating shaft 12, thereby increasing the rotational resistance of the rotating shaft 12.

[0035] Furthermore, an arc-shaped groove 51 is provided on the rotating ring 3. One end of the cylinder 46 passes through the arc-shaped groove 51 and is slidably connected to its inner wall. When the rotating ring 3 is rotated, the cylinder 46 is moved by the arc-shaped groove 51.

[0036] An annular mounting plate 52 is fixedly connected to the butterfly plate 11. A hollow column 53 is fixedly connected to the annular mounting plate 52. One end of the rotating shaft 12 also slides through the hollow column 53. A flexible friction ring 54 is fixedly connected to the hollow column 53. A friction ring 55 is installed at the bottom of the annular plate 43. The friction ring 55 is in close contact with the flexible friction ring 54, providing frictional resistance for the rotation of the annular plate 43.

[0037] Specifically, during the stage of adjusting the rotational resistance of the rotating shaft 12, the annular plate 43 is limited by the frictional force between the friction ring 55 and the flexible friction ring 54, thereby preventing the annular plate 43 from rotating with the rotating ring 3. When the cylinder 46 moves to the bottom along the guide groove 47, the movement of the cylinder 46 is restricted. Thus, when the rotating ring 3 continues to rotate, it will overcome the frictional resistance between the friction ring 55 and the flexible friction ring 54, and drive the friction column 2 and the annular plate 43 to rotate synchronously through the cylinder 46. Then, during the rotation of the friction column 2, the rotating shaft 12 and the mounting base 13 will rotate through the frictional force, thereby driving the test fabric to rotate actively to exchange friction parts.

[0038] An external gear ring 56 is fixedly connected to the rotating ring 3. An external gear ring 57 that meshes with multiple external gear rings 56 is rotatably connected inside the butterfly plate 11. A drive motor 58 is fixedly connected to the butterfly plate 11. A gear disk 59 that meshes with the external gear ring 57 is fixedly connected to the output shaft of the drive motor 58. When the drive motor 58 is started, the gear disk 59 is rotated, which in turn drives the external gear ring 57 to rotate, thereby driving multiple external gear rings 56 to rotate, and thus driving multiple rotating rings 3 to rotate.

[0039] A sliding groove 61 is provided on the annular plate 43. A rectangular plate 62 is fixedly connected to one end of the friction column 2. One end of the rectangular plate 62 passes through the sliding groove 61 and is slidably connected to its inner wall, which is used to guide and limit the movement of the friction column 2 along the annular plate 43.

[0040] A connecting plate 63 is fixedly connected to the friction ring 55, and a shaft 64 is rotatably connected to the connecting plate 63. A guide groove 65 is provided on the rectangular plate 62. One end of the shaft 64 is located in the guide groove 65. The guide groove 65 includes a straight sliding groove 66 provided on the rectangular plate 62. One end of the shaft 64 is located in the straight sliding groove 66 and is slidably connected to its inner wall. An oblique sliding groove 67 is provided on the rectangular plate 62 and communicates with the straight sliding groove 66. It is used to drive the rectangular plate 62 to move during the process of pushing the friction column 2 to move, so as to use the guide groove 65 to drive the shaft 64 to move upward, so as to drive the friction ring 55 to disengage from the flexible friction ring 54.

[0041] Specifically, when this device is being tested, if not all workstations are used, that is, if some hollow columns 41 are not equipped with rotating shafts 12, then when the drive motor 58 is started to rotate forward and drive multiple rotating rings 3 to rotate, the friction columns 2 that are not blocked by rotating shafts 12 will move synchronously with the sliding block 45, thereby driving the rectangular plate 62 to move. During this process, the shaft 64 moves first along the straight slide groove 66 and then along the inclined slide groove 67, thereby using the inclined slide groove 67 to push the shaft 64, thereby driving the friction ring 55 to move upward and separate from the flexible friction ring 54, thereby reducing the frictional resistance of the rotating ring 3 during subsequent rotation, thereby reducing the load on the drive motor 58.

[0042] A connecting pipe 68 is fixedly connected to the mounting base 13. One end of the rotating shaft 12 is located inside the connecting pipe 68, and a sliding protrusion 69 is fixedly connected to the inner wall of the connecting pipe 68. A sliding groove 71 is opened at one end of the rotating shaft 12, and one end of the sliding protrusion 69 is located inside the sliding groove 71 and is slidably connected to its inner wall. Thus, when the rotating shaft 12 rotates, it can drive the mounting base 13 to rotate synchronously.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A fabric friction testing machine, comprising a main body (1) and a butterfly plate (11) disposed thereon, wherein a rotating shaft (12) is mounted on the butterfly plate (11), and a mounting base (13) is provided at one end of the rotating shaft (12), characterized in that, It also includes: Multiple sets of friction columns (2) are slidably arranged inside the butterfly plate (11), and each set of friction columns (2) is evenly arranged around the rotating shaft (12), with one end passing through the butterfly plate (11) and contacting the rotating shaft (12) to apply variable frictional resistance to the rotating shaft (12); The rotating ring (3) is rotatably set inside the butterfly plate (11) and connected to the friction column (2); The transmission component (4) is set inside the butterfly plate (11), and the friction column (2) is connected to the rotating ring (3) through the transmission component (4). During the rotation of the rotating ring (3), the transmission component (4) makes the friction column (2) gradually increase the squeezing force on the rotating shaft (12), and after the squeezing force increases to a certain value, it drives the friction column (2) to rotate, so as to drive the rotating shaft (12) and the mounting base (13) to rotate actively.

2. The fabric friction testing machine according to claim 1, characterized in that: The transmission component (4) includes a hollow column (41) fixedly connected to the butterfly plate (11), one end of the rotating shaft (12) slidingly passing through the hollow column (41), a hollow shaft (42) fixedly connected to the rotating ring (3), the hollow column (41) passing through the hollow shaft (42) and rotatably connected to it, and an annular plate (43) is provided inside the butterfly plate (11), and the friction column (2) is slidably connected to the annular plate (43); A rectangular groove (44) is provided in the friction column (2), and a sliding block (45) is slidably connected in the rectangular groove (44). A cylinder (46) is fixedly connected to one end of the sliding block (45), and a guide groove (47) is provided on the friction column (2). One end of the cylinder (46) slides through the guide groove (47), and a hole (48) is provided at one end of the sliding block (45). A spring (49) is fixedly connected in the hole (48), and one end of the spring (49) is fixed to the inner wall of the rectangular groove (44). When the cylinder (46) is pushed, the spring (49) is squeezed to provide the friction column (2) with the squeezing force of the rotating shaft (12). Furthermore, an arc-shaped groove (51) is provided on the rotating ring (3). One end of the cylinder (46) passes through the arc-shaped groove (51) and is slidably connected to its inner wall. When the rotating ring (3) is rotated, the cylinder (46) is moved by the arc-shaped groove (51).

3. The fabric friction testing machine according to claim 2, characterized in that: An annular mounting plate (52) is fixedly connected to the butterfly plate (11). A hollow column (53) is fixedly connected to the annular mounting plate (52). One end of the rotating shaft (12) slides through the hollow column (53). A flexible friction ring (54) is fixedly connected to the hollow column (53). A friction ring (55) is installed at the bottom of the annular plate (43). The friction ring (55) is in close contact with the flexible friction ring (54) to provide friction resistance for the rotation of the annular plate (43).

4. The fabric friction testing machine according to claim 3, characterized in that: An external gear ring (56) is fixedly connected to the rotating ring (3). An external gear ring (57) that meshes with multiple external gear rings (56) is rotatably connected inside the butterfly plate (11). A drive motor (58) is fixedly connected to the butterfly plate (11). A gear disk (59) that meshes with external gear ring (57) is fixedly connected to the output shaft of the drive motor (58). The drive motor (58) is started to drive multiple rotating rings (3) to rotate.

5. The fabric friction testing machine according to claim 4, characterized in that: The annular plate (43) has a sliding groove (61), and a rectangular plate (62) is fixedly connected to one end of the friction column (2). One end of the rectangular plate (62) passes through the sliding groove (61) and is slidably connected to its inner wall to guide and limit the movement of the friction column (2).

6. The fabric friction testing machine according to claim 5, characterized in that: A connecting plate (63) is fixedly connected to the friction ring (55), and a shaft (64) is rotatably connected to the connecting plate (63). A guide groove (65) is provided on the rectangular plate (62). One end of the shaft (64) is located in the guide groove (65). It is used to drive the rectangular plate (62) to move during the process of pushing the friction column (2) to move, so as to drive the shaft (64) to move upward by using the guide groove (65) to drive the friction ring (55) to disengage from the flexible friction ring (54).

7. The fabric friction testing machine according to claim 6, characterized in that: The guide groove (65) includes a straight slide groove (66) opened on a rectangular plate (62), one end of the shaft (64) is located in the straight slide groove (66) and is slidably connected to its inner wall, and an oblique slide groove (67) communicating with the straight slide groove (66) is opened on the rectangular plate (62).

8. The fabric friction testing machine according to claim 7, characterized in that: A connecting pipe (68) is fixedly connected to the mounting base (13). One end of the rotating shaft (12) is located inside the connecting pipe (68), and a sliding protrusion (69) is fixedly connected to the inner wall of the connecting pipe (68). A sliding groove (71) is opened at one end of the rotating shaft (12), and one end of the sliding protrusion (69) is located inside the sliding groove (71) and is slidably connected to its inner wall.

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