Carbon fiber friction coefficient measuring device

Abstract

The utility model discloses a carbon fiber friction coefficient measuring device which comprises a supporting frame, a lifting rod and a driving device, the supporting frame comprises two supporting plates which are oppositely arranged, and the upper ends of the two supporting plates are connected with a fixing shaft; the lifting rod is arranged below the fixing shaft, the two ends of the lifting rod are in sliding connection with the two supporting plates respectively, and a tension detection device is arranged on the lifting rod; the driving device is connected with the lifting rod through the winding wire and used for driving the lifting rod to slide in the height direction of the supporting plate; in a test state, the fiber to be tested bypasses the top surface of the fixed shaft, one end of the fiber to be tested is connected with the tension detection device, and one end of the fiber to be tested is connected with the counterweight. The uniform pulling speed can be provided through the control device so as to ensure that the change of the pulling force borne by the carbon fiber in the testing process is stable, the measurement error caused by speed fluctuation is favorably reduced, and the accuracy of friction coefficient measurement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber detection, in particular to a device for measuring the friction coefficient of carbon fiber. Background Art

[0002] In the prior art, when measuring carbon fiber, the measuring shaft needs to be fixed, and the carbon fiber sample is in contact with the semi - circumference on the measuring shaft flatly. A counterweight with a certain weight is fixed at one end of the carbon fiber, and a tensiometer is fixed at the other end for measurement. During the measurement process, the tensiometer should be pulled vertically downward at a constant speed. It is not allowed to tilt or pull at a variable speed during the pulling process, and the speed is maintained at 2.5 - 3.5 m / s. Record the relatively stable reading of the tensiometer, so as to measure the friction coefficient of the carbon fiber.

[0003] However, during the measurement process, since the pulling speed is easily interfered by human factors and is difficult to accurately control, this directly affects the accuracy of the measurement. At the same time, directly connecting the tensiometer to the carbon fiber sample increases the complexity and difficulty of the operation. Summary of the Utility Model

[0004] In order to solve the above - mentioned technical problems, the utility model provides a device for measuring the friction coefficient of carbon fiber.

[0005] A device for measuring the friction coefficient of carbon fiber provided by the utility model includes:

[0006] A support frame, the support frame includes two relatively arranged support plates, and a fixed shaft is connected to the upper ends of the two support plates. The fixed shaft is used for winding the fiber to be measured;

[0007] A lifting rod, the lifting rod is arranged below the fixed shaft, and both ends of the lifting rod are slidably connected to the two support plates respectively. A tensile force detection device is arranged on the lifting rod, and the tensile force detection device is used to connect with the first end of the fiber to be measured;

[0008] A driving device, the driving device is connected to the lifting rod through a winding wire, and the driving device is used to drive the lifting rod to slide along the height direction of the support plate;

[0009] In the test state, the fiber to be measured bypasses the top surface of the fixed shaft, one end of the fiber to be measured is connected to the tensile force detection device, and one end of the fiber to be measured is connected to a counterweight.

[0010] In some embodiments of the utility model, a chute is respectively arranged on the two support plates, and the chute extends along the vertical direction of the support plate;

[0011] A slider adapted to the chute is respectively arranged at both ends of the lifting rod, and the slider is slidably clamped in the chute.

[0012] In some embodiments of the present utility model, an elastic member is arranged on the slider, and in the elastic deformation direction of the elastic member, both ends of the elastic member are respectively connected to the slider and the support plate.

[0013] In some embodiments of the present utility model, the elastic member is a tensile elastic structure, and the upper end of the elastic member is connected to the groove wall of the chute close to the lifting rod side; and / or,

[0014] The elastic member is a compression elastic structure, and the lower end of the elastic member is connected to the groove wall of the chute far from the lifting rod side.

[0015] In some embodiments of the present utility model, the driving device includes a reduction motor;

[0016] The output end of the reduction motor is connected with a winding shaft, the winding shaft is arranged in parallel with the lifting rod, a winding wheel is respectively arranged at both ends of the winding shaft, one end of the winding line is wound on the winding wheel, and the other end of the winding line is fixedly connected to the lifting rod.

[0017] In some embodiments of the present utility model, the support frame further includes a bottom plate, the bottom plate is arranged at the lower ends of the two support plates, and the reduction motor is installed on the bottom plate.

[0018] In some embodiments of the present utility model, a notch is arranged on the lower surface of the lifting rod, and the tensile force detection device is inserted into the notch;

[0019] A through hole is arranged on the upper surface of the lifting rod, the through hole is communicated with the notch, and the detection end of the tensile force detection device penetrates through the through hole and extends above the lifting rod to be connected with the fiber to be tested.

[0020] In some embodiments of the present utility model, a plurality of adsorption plates are arranged on the side surface of the tensile force detection device;

[0021] A plurality of magnet sheets adapted to the adsorption plates are arranged on the lower surface of the lifting rod, and the magnet sheets are magnetically connected with the adsorption plates.

[0022] In some embodiments of the present utility model, a magic sticker is arranged at the detection end of the tensile force detection device, and in the test state, one end of the fiber to be tested is fixed between the magic stickers.

[0023] In some embodiments of the present utility model, the tensile force detection device includes a digital display tensile force meter.

[0024] The carbon fiber friction coefficient measuring device provided by the present utility model has at least the following advantages:

[0025] For the carbon fiber friction coefficient measuring device provided by the present utility model, the fiber to be measured is wound around a fixed shaft, then one end of the fiber to be measured is connected to a counterweight, and the other end of the fiber to be measured is connected to a tensile force detecting device on a lifting rod. A driving device moves the lifting rod by controlling a winding wire, thereby pulling the fiber to be measured. The value during the pulling process is measured by the tensile force detecting device, and then the friction coefficient of the carbon fiber is obtained, realizing the automation of the testing process. This not only reduces the labor intensity of the operator, but also improves the stability and repeatability of the test. At the same time, a uniform pulling speed can be provided through a control device to ensure that the tensile force change received by the carbon fiber during the test is stable, which is beneficial to reducing the measurement error caused by speed fluctuations and improving the accuracy of the friction coefficient measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of a carbon fiber friction coefficient measuring device provided by an exemplary embodiment of the present utility model;

[0028] Figure 2 It is a partial schematic structural diagram of a carbon fiber friction coefficient measuring device provided by an exemplary embodiment of the present utility model;

[0029] Figure 3 It is a schematic structural diagram of a lifting rod provided by an exemplary embodiment of the present utility model;

[0030] Figure 4 It is a schematic structural diagram of a tensile force detecting device provided by an exemplary embodiment of the present utility model.

[0031] The reference signs in the drawings are as follows:

[0032] 1, base plate; 2, support plate; 201, chute;

[0033] 3, fixed shaft;

[0034] 4, lifting rod; 401, slider; 402, notch; 403, through hole; 404, magnet sheet;

[0035] 5, tensile force detecting device; 501, pull ring; 502, adsorption plate; 503, magic sticky plate; 504, magic sticky cloth; 505, mother - and - son buckle.

[0036] 6. Storage board; 7. Weights;

[0037] 8. Driving device; 801. Reeling shaft; 802. Reeling wheel; 803. Reeling wire; 804. Speed reduction motor;

[0038] 9. Elastic parts. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the utility model.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] Carbon fiber refers to high-strength and high-modulus fiber with a carbon content of more than 90%. It is an excellent material for manufacturing high-tech equipment such as aerospace. When testing the performance of carbon fiber tow, the friction coefficient of the carbon fiber tow needs to be evaluated.

[0042] In the prior art, when measuring the friction coefficient of carbon fiber, the carbon fiber sample needs to be flatly contacted with a semicircle on the measuring axis, a counterweight block of a certain weight is fixed at one end of the carbon fiber, and a dynamometer is fixed at the other end for measurement. During the measurement process, the dynamometer should be pulled downward at a uniform speed perpendicular to the ground. It should not be tilted or pulled at a variable speed during the pulling process. The speed is maintained at 2.5-3.5m / s, and a relatively stable dynamometer reading is recorded to measure the friction coefficient of the carbon fiber.

[0043] However, during the measurement process, the pulling speed is easily affected by human factors and is difficult to control accurately, which directly affects the accuracy of the measurement. At the same time, directly connecting the tensile meter to the carbon fiber sample increases the complexity and difficulty of the operation.

[0044] To solve the above technical problems, the present utility model provides a carbon fiber friction coefficient measuring device. The fiber to be measured is wound around a fixed shaft, and then one end of the fiber to be measured is connected to a counterweight, and the other end of the fiber to be measured is connected to a tensile force detecting device on a lifting rod. The driving device moves the lifting rod by controlling a winding wire, thereby pulling the fiber to be measured. The value during the pulling process is measured by the tensile force detecting device, and then the friction coefficient of the carbon fiber is obtained, realizing the automation of the testing process. This not only reduces the labor intensity of the operator, but also improves the stability and repeatability of the test. At the same time, the control device can provide a uniform pulling speed to ensure that the tensile force on the carbon fiber during the test is stable, which is beneficial to reducing the measurement error caused by speed fluctuations, improving the accuracy of the friction coefficient measurement, and reducing the error introduced by human factors.

[0045] An exemplary embodiment of the present utility model provides a carbon fiber friction coefficient measuring device, which includes a support frame, a lifting rod 4 and a driving device 8. Among them, the support frame includes two oppositely arranged support plates 2, and the upper ends of the two support plates 2 are connected with a fixed shaft 3 for winding the fiber to be measured. Exemplarily, referring to Figure 1 , along the height direction of the support plate 2, the width of the support plate 2 gradually widens from top to bottom. In this way, the supporting force and reliability of the support plate 2 can be increased. When pulling the fiber to be measured, the load can be effectively dispersed and transmitted, and the structural displacement caused by the load action can be reduced, ensuring the overall stability of the support frame. The lifting rod 4 is arranged below the fixed shaft 3, and the two ends of the lifting rod 4 are respectively slidably connected to the two support plates 2. A tensile force detecting device 5 is arranged on the lifting rod 4, and the tensile force detecting device 5 is used to connect with the first end of the fiber to be measured; the driving device 8 is connected with the lifting rod 4 through a winding wire 803, and the driving device 8 is used to drive the lifting rod 4 to slide along the height direction of the support plate 2.

[0046] In the test state, the fiber to be measured bypasses the top surface of the fixed shaft 3, one end of the fiber to be measured is connected to the tensile force detecting device 5, and the other end of the fiber to be measured is connected to the counterweight 7. Exemplarily, referring to Figure 1, when measuring, the fiber to be measured is wound around the fixed shaft 3, then a counterweight 7 is connected to one end of the fiber to be measured, the other end of the fiber to be measured is connected to the tensile force detection device 5, and then the driving device 8 is controlled to wind up the winding wire 803. The winding wire 803 pulls the lifting rod 4 to slide downward uniformly along the support plate 2. The support plate 2 drives one end of the fiber to be measured to lower. Correspondingly, the height of the other end of the fiber to be measured will increase so that the counterweight 7 is lifted. At this time, the tensile force detection device 5 will display the tensile force value at this time. Through the tensile force value, the friction force between the fiber to be measured and the fixed shaft 3 can be obtained, and then the friction coefficient of the fiber to be measured can be calculated. In this way, the value during the pulling process is measured by the tensile force detection device 5, and then the friction coefficient of the carbon fiber is obtained, realizing the automation of the test process. This not only reduces the labor intensity of the operator, but also improves the stability and repeatability of the test. At the same time, through the control device, the pulling speed can be ensured to be uniform, and then it is ensured that the change in the tensile force received by the carbon fiber during the test is stable and predictable, which helps to reduce the measurement error caused by speed fluctuations, improve the accuracy of the friction coefficient measurement, and reduce the error introduced by human factors.

[0047] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , a chute 201 is respectively provided on two support plates 2. The chute 201 extends along the vertical direction of the support plate 2; a slider 401 adapted to the chute 201 is respectively provided at both ends of the lifting rod 4. The slider 401 is slidably connected to the chute 201. Among them, referring to Figure 1 and Figure 2 , the slider 401 can adopt an I-shaped slider 401. The end face of the I-shaped slider 401 is connected to the end face of the lifting rod 4. The grooves on both sides of the I-shaped slider 401 are respectively clamped in the chute 201. In this way, the chute 201 can provide a clear movement track for the lifting rod 4, so that the lifting rod 4 can only perform linear motion along the vertical direction, thereby realizing precise control of the lifting position. The close cooperation between the slider 401 and the chute 201 reduces the shaking and deviation during the movement process and improves the stability of the lifting movement.

[0048] In an example, rollers (not shown in the drawings) are provided on the slider 401 to reduce the friction force with the chute 201 and avoid deviation of the results caused by uneven force and shaking when the slider 401 is pulled.

[0049] In some embodiments of the present invention, referring to Figure 1 and Figure 2, an elastic member 9 is provided on the slider 401, and in the elastic deformation direction of the elastic member 9, the two ends of the elastic member 9 are respectively connected to the slider 401 and the support plate 2. Among them, the elastic member 9 includes but is not limited to an elastic band and a spring. It can be understood that when the lifting rod 4 is not moving, the elastic member 9 can limit the lifting rod 4 to prevent it from accidentally moving due to external factors (such as vibration, wind force, etc.), thereby enhancing the stability and safety of the device. In the event of emergency braking or accidents, the elastic member 9 can also respond quickly to provide additional support and buffering to protect the lifting rod 4 and the fiber to be tested from damage.

[0050] In some embodiments of the present invention, reference Figure 1 and Figure 2 The elastic member 9 is a tensile elastic structure, and the upper end of the elastic member 9 is connected to the groove wall of the slide 201 near the lifting rod 4. It can be understood that the elastic member 9 is arranged above the slider 401, the upper end of the elastic member 9 is connected to the groove wall of the slide 201, and the lower end of the elastic member 9 is connected to the slider 401, wherein the elastic member 9 adopts an elastic rope. The elastic member 9 can provide a stable rebound force when the lifting rod 4 is stretched, so that the slider 401 maintains a stable motion state in the slide 201, which helps to reduce the impact and vibration of the slider 401 during the movement process, and improves the stability and durability of the system. By changing the length or tension of the elastic member 9, it can adapt to the use requirements of the lifting rod 4 in different states.

[0051] In another embodiment, the elastic member 9 is a compression elastic structure, and the lower end of the elastic member 9 is connected to the groove wall of the slide 201 away from the lifting rod 4. It can be understood that the elastic member 9 is arranged below the slider 401, the upper end of the elastic member 9 is connected to the slider 401, and the lower end of the elastic member 9 is connected to the groove wall of the slide 201 away from the lifting rod 4. In this embodiment, the elastic member 9 can adopt a spring structure, and when the lifting rod 4 is not moving, it provides a certain support for the lifting rod 4, so as to avoid the lifting rod 4 from falling due to external factors when the lifting rod 4 is not working, so that the lifting rod 4 can maintain a stable vertical position in a static state, and reduce the tilt or shaking caused by uneven force.

[0052] In some embodiments of the present invention, reference Figure 1 and Figure 2, the driving device 8 includes a reduction motor 804. The output end of the reduction motor 804 is connected to a winding shaft 801. The winding shaft 801 is arranged in parallel with the lifting rod 4. A winding wheel 802 is provided at each end of the winding shaft 801. One end of the winding wire 803 is wound around the winding wheel 802, and the other end of the winding wire 803 is fixedly connected to the lifting rod 4. When in use, the reduction motor 804 starts to operate. The output end of the reduction motor 804 drives the winding shaft 801 to rotate. Through the rotation of the winding shaft 801, the winding wheel 802 is driven to rotate, so that the winding wheel 802 starts to wind the winding wire 803. The winding wire 803 will pull the lifting rod 4, causing the lifting rod 4 to move downward at a uniform speed. By adjusting the rotation speed of the reduction motor 804, the moving speed of the lifting rod 4 can be conveniently controlled to meet different working requirements, realizing the automation of the test process. This not only reduces the labor intensity of the operator but also improves the stability and repeatability of the test. At the same time, the reduction motor 804 can ensure the uniformity of the pulling speed, thereby ensuring that the change in the tensile force on the carbon fiber during the test is stable and predictable, helping to reduce the measurement error caused by speed fluctuations, improving the accuracy of the friction coefficient measurement, and reducing the error introduced by human factors.

[0053] In some embodiments of the present invention, referring to Figure 1 , the support frame further includes a bottom plate 1. The bottom plate 1 is arranged at the lower ends of the two support plates 2. The reduction motor 804 is installed on the bottom plate 1. In this way, the bottom plate 1 can provide a solid support surface for the carbon fiber friction coefficient measuring device. Installing the reduction motor 804 on the bottom plate 1 can ensure the stability of the reduction motor 804 during operation and reduce the unstable factors caused by vibration or shaking. At the same time, placing the reduction motor 804 on the bottom plate 1, the weight of the reduction motor 804 itself can also provide a certain degree of stability for the carbon fiber friction coefficient measuring device.

[0054] In other embodiments, referring to Figure 1 , a storage plate 6 can be further provided above the bottom plate 1. Among them, the reduction motor 804 is arranged between the storage plate 6 and the bottom plate 1. The two ends of the storage plate 6 are respectively connected to the support plates 2. Multiple weights 7 can be placed above the storage plate 6.

[0055] In some embodiments of the present invention, referring to Figure 3, a notch 402 is provided on the lower surface of the lifting rod 4, and the tensile force detection device 5 is inserted into the notch 402; a through hole 403 is provided on the upper surface of the lifting rod 4, and the through hole 403 communicates with the notch 402. The detection end of the tensile force detection device 5 penetrates through the through hole 403 and extends above the lifting rod 4 to be connected to the fiber to be tested. Inserting the tensile force detection device 5 into the notch 402 of the lifting rod 4 helps to ensure the stability of the tensile force detection device 5 during the test and prevent it from shifting or shaking due to external factors. The detection end of the tensile force detection device 5 passes through the through hole 403 and is connected to the fiber to be tested. Among them, the through hole 403 is provided at the central position of the lifting rod 4. The through hole 403 at the central position enables the tensile force detection device 5 to be located directly above the lifting rod 4, ensuring that when the fiber to be tested is subjected to a tensile force, the direction of the force can accurately and vertically act on the tensile force detection device 5, reducing the error caused by eccentric loading and improving the accuracy of tensile force detection.

[0056] In some embodiments of the present invention, referring to Figure 4 , a plurality of adsorption plates 502 are provided on the side surface of the tensile force detection device 5; a plurality of magnet sheets 404 adapted to the adsorption plates 502 are provided on the lower surface of the lifting rod 4, and the magnet sheets 404 are magnetically connected to the adsorption plates 502. Exemplarily, referring to Figure 3 and Figure 4 , two adsorption plates 502 are provided on the left and right sides of the tensile force detection device 5, and the two adsorption plates 502 extend along the length direction of the lifting rod 4. Referring to Figure 3 , one magnet sheet 404 is provided on each of the left and right sides of the notch 402. When the tensile force detection device 5 is clamped in the notch 402, the adsorption plate 502 is adsorbed to the magnet sheet 404. By the adsorption between the adsorption plate 502 and the magnet sheet 404, the connection stability between the tensile force detection device 5 and the lifting rod 4 can be further ensured, effectively ensuring that the tensile force detection device 5 remains stable when clamped in the notch 402 and is not easily loosened or detached due to external force or vibration. The magnetic connection can also ensure that the adsorption plate 502 and the magnet sheet 404 are automatically aligned when they come into contact, reducing the misalignment problem caused by improper installation and improving the accuracy and reliability of the connection.

[0057] In other embodiments, referring to Figure 4 , a pull ring 501 can also be provided at the lower end of the tensile force detection device 5. When manual measurement is required, the tensile force detection device 5 is manually pulled through the pull ring 501, so that the adsorption plate 502 is separated from the magnet sheet 404, facilitating manual operation and convenient for switching the measurement method. The user can flexibly select the measurement method according to the actual test requirements, improving the flexibility and adaptability of the test.

[0058] In some embodiments of the present invention, referring to Figure 4, a detection end of the tensile force detection device 5 is provided with a magic tape. In a test state, one end of a fiber to be tested is fixed between the magic tapes. Exemplarily, the magic tape includes a magic sticky board 503 and a magic sticky cloth 504. The magic sticky board 503 is provided at the detection end of the tensile force detection device 5, and the magic sticky cloth 504 is connected to the upper end of the magic sticky board 503. Among them, the magic sticky cloth 504 can be bent to adhere to the magic sticky board 503. When in use, the end of the fiber to be detected is wound around the magic sticky cloth 504, and then the magic sticky cloth 504 is adhered to the magic sticky board 503, so that the magic sticky board 503 and the magic sticky cloth 504 are adhered to each other, thereby quickly connecting the fiber to be detected with the tensile force detection device 5. The connection process is simple, thus shortening the preparation time before the test and improving the overall test efficiency. At the same time, the magic sticky cloth 504 can be bent to adapt to fibers of different shapes and sizes, thereby ensuring a tight fit between the fiber and the detection device, and improving the flexibility and accuracy of the test. After the test is completed, the operator can easily peel off the magic sticky cloth 504, remove the tested fiber, and quickly replace it with a new sample to be tested, which helps to continuously perform multiple tests and improve the test efficiency.

[0059] In other embodiments, referring to Figure 4 , mating snap fasteners 505 can also be provided on the magic sticky board 503 and the magic sticky cloth 504. The magic sticky cloth 504 is further snap-connected to the magic sticky board 503 through the snap fasteners 505. When connecting the fiber to be tested with the detection end of the tensile force detection device 5, the snap fasteners 505 are disengaged, one end of the fiber to be tested is wound around the magic sticky cloth 504 and is located between the snap fasteners 505, and then the magic sticky cloth 504 is adhered to the magic sticky board 503, and the magic sticky board 503 and the magic sticky cloth 504 are adhered to each other through the snap fasteners 505. By setting the double pasting effect of the snap fasteners 505 and the magic tape, the fiber to be tested is firmly fixed at the detection end of the tensile force detection device 5, providing higher stability and reliability for the test process. Even when encountering a large tensile force or vibration during the test, the fiber to be tested is not easily detached from the detection device, ensuring the continuity and accuracy of the test.

[0060] In some embodiments of the present invention, referring to Figure 4 , the tensile force detection device 5 includes a digital display tensile force meter. By adopting a digital display tensile force meter, high-precision detection results can be provided. At the same time, the digital display tensile force meter is equipped with a liquid crystal display screen, which can directly display the measurement results, making it more intuitive and convenient to read the data. Without complex calculations or conversions, the required tensile force data can be quickly obtained.

[0061] The content described above can be implemented alone or in various combinations, and these variant ways are all within the protection scope of the present invention.

[0062] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the friction coefficient of carbon fiber, characterized in that, Comprising: A support frame, the support frame includes two oppositely arranged support plates, the upper ends of the two support plates are connected with a fixed shaft, and the fixed shaft is used for winding the fiber to be measured; A lifting rod, the lifting rod is arranged below the fixed shaft, the two ends of the lifting rod are respectively slidably connected with the two support plates, and a tensile force detection device is arranged on the lifting rod, and the tensile force detection device is used for connecting with the first end of the fiber to be measured; A driving device, the driving device is connected with the lifting rod through a winding line, and the driving device is used for driving the lifting rod to slide along the height direction of the support plate; In the test state, the fiber to be measured bypasses the top surface of the fixed shaft, one end of the fiber to be measured is connected with the tensile force detection device, and one end of the fiber to be measured is connected with a counterweight weight.

2. The carbon fiber friction coefficient measuring device according to claim 1, characterized in that One chute is respectively arranged on the two support plates, and the chute extends along the vertical direction of the support plate; One slider adapted to the chute is respectively arranged at the two ends of the lifting rod, and the slider is slidably clamped in the chute.

3. The carbon fiber friction coefficient measuring device according to claim 2, characterized in that, An elastic member is arranged on the slider, and in the elastic deformation direction of the elastic member, the two ends of the elastic member are respectively connected with the slider and the support plate.

4. The carbon fiber friction coefficient measuring device according to claim 3, wherein The elastic member is a tensile elastic structure, and the upper end of the elastic member is connected with the groove wall of the chute close to the lifting rod; and / or, The elastic member is a compression elastic structure, and the lower end of the elastic member is connected with the groove wall of the chute far from the lifting rod.

5. The carbon fiber friction coefficient measuring device according to claim 1, characterized in that, The driving device includes a reduction motor; The output end of the reduction motor is connected with a winding shaft, the winding shaft is arranged parallel to the lifting rod, a winding wheel is respectively arranged at the two ends of the winding shaft, one end of the winding line is wound on the winding wheel, and the other end of the winding line is fixedly connected with the lifting rod.

6. The carbon fiber friction coefficient measuring device according to claim 5, characterized in that, The support frame further includes a bottom plate, the bottom plate is arranged at the lower ends of the two support plates, and the reduction motor is installed on the bottom plate.

7. The carbon fiber friction coefficient measuring device according to claim 1, characterized in that, A notch is arranged on the lower surface of the lifting rod, and the tensile force detection device is inserted into the notch; A through hole is arranged on the upper surface of the lifting rod, the through hole is communicated with the notch, and the detection end of the tensile force detection device penetrates through the through hole and extends above the lifting rod to be connected with the fiber to be measured.

8. The carbon fiber friction coefficient measuring device according to claim 7, characterized in that, A plurality of adsorption plates are arranged on the side surface of the tensile force detection device; A plurality of magnet sheets adapted to the adsorption plates are arranged on the lower surface of the lifting rod, and the magnet sheets are magnetically connected with the adsorption plates.

9. The carbon fiber friction coefficient measuring device according to claim 7, characterized in that, A magic tape is arranged at the detection end of the tensile force detection device. In the test state, one end of the fiber to be measured is fixed between the magic tapes.

10. The carbon fiber friction coefficient measuring device according to any one of claims 1-9, characterized in that, The tensile force detection device includes a digital display tensile force meter.

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