CN113670711A - Quick-release and quick-centering fabric self-locking experimental clamp - Google Patents
Quick-release and quick-centering fabric self-locking experimental clamp Download PDFInfo
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- CN113670711A CN113670711A CN202111068749.6A CN202111068749A CN113670711A CN 113670711 A CN113670711 A CN 113670711A CN 202111068749 A CN202111068749 A CN 202111068749A CN 113670711 A CN113670711 A CN 113670711A
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- 239000004744 fabric Substances 0.000 title claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000013519 translation Methods 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 4
- 230000035515 penetration Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 229920006253 high performance fiber Polymers 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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Abstract
The invention discloses a quick-release and quick-centering fabric self-locking experimental clamp which comprises a frame, an eccentric pressing plate, a movable clamp seat, a centering pull rod, a transmission screw rod and a pre-tightening screw rod, wherein the frame is provided with a guide rail and a T-shaped groove, the movable clamp seat is provided with a guide rail groove which is in sliding connection with the frame, the direction of the fabric pre-tightening force is unchanged, the centering pull rod is in sliding connection with the T-shaped groove of the frame through a T-shaped structure, the quick centering of a pulling position is realized, the eccentric pressing plate ensures that a fabric is self-locked after being clamped, the slippage in the pre-tightening or pulling process is prevented, and meanwhile, the operation steps of fabric clamping are reduced. When carrying out the use of anchor clamps, this fabric experiment anchor clamps pass through the both ends of eccentric clamp plate and the fixed fabric of recess centre gripping, and the effectual stability that increases the fabric and the efficiency of reliability and experiment use the pull rod of quick centering, have realized the accurate centering of pull out the position, reduce the experimental error of dismantling anchor clamps and producing.
Description
Technical Field
The invention relates to a high-performance textile yarn pulling-out experimental device, and belongs to the technical field of test clamps.
Background
With the continuous development of material science, part of high-performance fiber materials have higher performance, lighter weight and excellent flexibility and flexibility compared with the traditional metal materials. For example, body protective equipment made of high performance fiber materials has been widely used because of its comfort, flexibility, and breathability. The performance of the body armor is generally tested by adopting a ballistic penetration experiment, but the ballistic penetration experiment has higher dependence on experiment conditions and experiment equipment. According to the mechanism research of the ballistic penetration experiment, the fabric mainly absorbs energy by drawing and sliding of fabric yarns in the process of receiving ballistic impact, namely, the kinetic energy of the impact warhead is dissipated by the mutual friction between the fabric yarns and fibers. The feasibility of characterizing the ballistic impact performance of fabrics based on yarn draw tests has been verified. The reliability of clamping the fabric by the fabric clamp in the process of the yarn drawing experiment and the centering accuracy of the drawing force and the yarn in the process of the drawing experiment are two important factors influencing the accuracy and the reliability of experiment data.
Disclosure of Invention
The invention provides a quick-release and quick-centering fabric self-locking experimental clamp in order to make up the defects of the existing pulling experimental clamp.
The technical scheme adopted by the invention is as follows:
the utility model provides a quick detach and quick centering's fabric auto-lock experiment anchor clamps, realizes the quick centering of fabric quick assembly disassembly and extraction experimentation pulling position on anchor clamps, fabric experiment anchor clamps include: the clamp comprises a frame, an eccentric pressing plate, a movable clamp seat, a pre-tightening screw rod, a centering screw rod and a centering pull rod.
The frame is a hollow frame shaped like a Chinese character 'hui', the upper side and the lower side of the interior of the hollow frame are respectively provided with a section of guide rail which can be matched with the movable clamp seat to ensure that the application direction of the pretightening force is kept fixed; the left end of the frame is provided with a pair of fixed supports, and the distance between the fixed supports and the two ends of the eccentric pressing plate are respectively hinged and fixed through fixed bolts; a curved surface groove is arranged between the fixed supports of the frame and is matched with the fabric and the eccentric pressing plate, so that the friction force between the fabric and the clamp is increased; the lower end of the frame is provided with a T-shaped guide rail groove which limits the parallel movement and rotation of the centering pull rod; the left lower end of the frame is simultaneously provided with a pair of centering screw rod supports, and the centering screw rod supports are in clearance fit with the centering screw rods to ensure the free rotation of the centering screw rods; the right end of the frame is provided with a round hole, and the round hole is in clearance fit with the pre-tightening screw rod. The free rotation and the parallel movement of the pre-tightening screw rod are ensured;
the cross section of the side surface of the eccentric pressing plate is of a water-drop-like shape, the upper surface of the eccentric pressing plate is a plane and is matched with the nut to apply pre-tightening pressure, and the lower surface of the eccentric pressing plate is an arc surface; the cambered surface forms line contact with the fabric surface and the curved surface groove of the frame to generate pressure; two ends of the eccentric pressing plate are fixed by using an eccentric structure; the eccentric structure can adjust the clamping thickness of the fabric, and meanwhile, the self-locking of the fabric during transverse pre-tightening is realized, so that the reliability of the experiment is improved;
the middle part of the centering pull rod is provided with threads which are matched with the centering screw rod for transmission, so that the centering position of the centering pull rod is changed; the bottom end of the centering pull rod is T-shaped and is matched with the T-shaped guide groove of the frame, so that the rotation of the centering pull rod is limited, the centering pull rod moves along the normal direction of the fabric, and the movement in the drawing direction is limited;
a pair of fixed supports and concave grooves which are the same as the frame are arranged at two ends of the movable clamp seat and are hinged with the eccentric pressing plate; the two ends of the movable clamp seat are provided with grooves, and the grooves enable the contact area of the clamped end of the fabric to be larger, the fabric to be tightly attached and the generated friction force to be larger;
one end of the pretightening force screw is connected with the movable clamp through threads, the other end of the pretightening force screw is connected with the frame through a nut, one side of the nut of the pretightening force screw is provided with a pretightening force sensor, and pretightening force change in a pretightening process and an experimental process is detected; and a bolt hole is formed in the left end of the centering screw rod, and the bolt hole is connected with a bolt to realize the transmission of the centering screw rod.
Advantageous effects of the invention
The invention provides a quick-release and quick-centering fabric self-locking experimental clamp. Compared with the prior art, the method has the following beneficial effects:
1. according to the invention, the water drop-like eccentric pressing plate is adopted, the two ends are hinged, the fabric can be effectively clamped under the condition of reducing the number of bolts and nuts, the two ends of the fabric can be clamped only by screwing two nuts after the fabric is placed into the clamp, meanwhile, the self-locking effect of the fabric after clamping is realized by introducing the eccentric self-locking structure, and the stability and the reliability of fabric clamping are effectively improved.
2. According to the invention, the movable centering pull rod is adopted, so that the rapid movement of different drawing positions can be realized through the transmission of the bolt and the centering screw rod according to different transverse widths of fabrics in the experimental process, the accurate centering of drawing force and the drawing positions can be realized, and the experimental error generated by disassembling the clamp can be reduced.
3. According to the invention, the fabric clamping operation steps of experimenters can be effectively reduced, the clamping efficiency of the experimental fabric is effectively improved, the repeated operability of the experiment is improved, and meanwhile, the centering adjustment efficiency is higher when the experiment of fabrics with different sizes is carried out, and the accuracy and the efficiency of the whole experiment can be effectively improved.
4. According to the invention, the fixture is fixed with the experiment machine by adopting the pull rod, the fixing mode is simple and convenient, the fixture is suitable for different types of mechanical testing machines (a special fabric tension machine is not needed), and the equipment cost of the experiment can be greatly reduced.
Drawings
FIG. 1 is an assembly drawing of a quick-release and quick-centering fabric self-locking experimental fixture
FIG. 2 is a structural view of a frame
FIG. 3 is a view showing the structure of an eccentric pressing plate
FIG. 4 is a view showing the structure of the movable clamp base
FIG. 5 is a schematic view of the movable clamp seat and the eccentric pressing plate
FIG. 6 is a schematic view of the alignment rod and the frame
In the figure: 1. a frame; 2. an eccentric pressing plate; 3. centering the pull rod; 4. a drive screw; 5. a movable clamp base; 6. pre-tightening the screw; 7. A drive pin; 8. a platen bolt; 9. a nut; 10. positioning the fastening stud; 11. a pre-tightening force sensor gasket; 12. a pre-tightening force sensor; 13. a guide rail; 14. a yarn groove; 15. a transmission support; 16. a pressure plate support; 17. clamping the groove; 18. a T-shaped groove; 19. fastening screw holes; 20. pre-tightening the through hole; 21. a hinged screw hole; 22. pressing a cambered surface; 23. a fastening notch; 24. a guide rail groove; 25. pre-tightening the screw hole of the screw rod; 26. and a transmission threaded hole.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention will be clearly and completely described below by way of specific embodiments and with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the present invention may be variously modified and changed. Any modification, equivalent replacement, improvement and the like made within the principle of the present invention are included in the protection scope of the present invention.
Referring to fig. 1-6, the embodiment of the present invention provides a technical solution: a quick-release and quick-centering fabric self-locking experimental clamp mainly comprises a frame 1, two eccentric pressing plates 2, a centering pull rod 3, a transmission screw rod 4, a movable clamp seat 5 and a pre-tightening screw rod 6. As shown in fig. 2, the frame 1 comprises three major parts, the first part is that two pressure plate supports 16 are arranged at the left end of the frame 1, and a clamping groove 17 is arranged between the two pressure plate supports 16; the second part is a hollow part of the frame 1, two guide rails 13 are arranged on the upper side and the lower side of the hollow part, a pre-tightening through hole 20 is arranged on the right side of the hollow part, and a yarn groove 14 is arranged at the same time, so that the yarn can be conveniently drawn; the last part is the lower part of the frame, which is provided with a transmission support 15 and a T-shaped groove 18 in the middle.
As shown in fig. 3, the two ends of the eccentric pressing plate 2 are provided with hinged screw holes 21, and the middle is provided with a fastening notch 23; the lower part of the eccentric pressing plate is a pressing plate cambered surface 23 eccentric to the hinged screw hole 21.
As shown in fig. 4, the upper portion of the movable clamp base 5 is structurally symmetrical to the left end of the frame 1, and also includes two press plate supports 16, a clamping groove 17 and a fastening screw hole 19, the upper and lower ends of the movable clamp are provided with guide rail grooves 24 capable of being engaged with the guide rails 13 of the movable frame 1, and at the same time, one end of the movable clamp is provided with a pre-tightening screw hole 25 capable of being engaged with the pre-tightening screw 6.
As shown in figure 1, the left end part of the fabric self-locking experimental clamp for quick release and quick centering is formed by assembling an eccentric pressing plate 2, two pressing plate bolts 8, a nut 9 and a positioning fastening stud 10, wherein two ends of the eccentric pressing plate 2 are hinged to a pressing plate support 16 through the two pressing plate bolts 8, the positioning fastening stud 10 and the nut 9 penetrate through a fastening notch 23 to be matched with a fastening screw hole 19, as shown in figure 5, the very obvious fastening effect between a clamping groove 17 of a fabric and a pressing plate cambered surface 22 can be realized by screwing the nut 9, and an eccentric mechanism can be effectively formed. In other words, the use of the experimental clamping nut can be greatly reduced through the structure, the clamping efficiency is improved, meanwhile, the friction area between the fabric and the clamp during clamping can be increased through the introduction of the clamping groove 17 and the pressing plate cambered surface 22, a self-locking effect is formed in the process of pre-tightening the fabric, and the clamping stability and reliability are improved.
As shown in figure 1, the middle part of the fabric self-locking experimental clamp for quick release and quick centering is a movable fabric clamping end formed by assembling a movable clamp seat 5, an eccentric pressing plate 2, two pressing plate bolts 8, a nut 9, a positioning fastening stud 10 and a pre-tightening screw 6, wherein the assembling of the eccentric pressing plate 2, the pressing plate bolts 8, the nut 9 and the positioning fastening stud 10 is the same as that of the previous section. As shown in fig. 5, which is an interface diagram of the eccentric pressing plate 2 and the pressing plate bolt 8, it is obvious that the fabric can be rapidly clamped, and the stability and reliability of clamping the fabric can be improved. Meanwhile, the pre-tightening screw 6 and the pre-tightening screw hole 25 are completely bound with the movable clamp seat 5 through threads. The guide rail groove 24 of the movable clamp seat 5 is matched with the guide rail 13 of the frame 1, so that the fabric can only freely move in the pre-tightening direction after being clamped (when the pre-tightening force is not applied), and the experimental error caused by the movement in other directions is reduced.
As shown in fig. 1, the right end of the quick-release and quick-centering fabric self-locking experimental fixture is a pre-tightening end formed by assembling a pre-tightening screw 6, a nut 9, a pre-tightening force sensor gasket 11 and a pre-tightening force sensor 12, the pre-tightening force sensor gasket 11, the pre-tightening force sensor 12, the pre-tightening force sensor gasket 11 and the nut 9 are sequentially arranged to penetrate through the pre-tightening screw 6, pre-tightening force is provided for an experimental fabric through the nut 9, and the pre-tightening force sensor 12 is matched with a collecting tool to collect pre-tightening force changes in an experimental process in real time.
As shown in FIG. 1, the lower end of the quick-release and quick-centering fabric self-locking experimental fixture is a quick-centering structure formed by assembling a centering pull rod 3, a transmission screw rod 4, a transmission pin 7, a nut 9, a transmission support 15 and a T-shaped groove 18. The transmission screw rod 4 is fixed between the two transmission supports 15 through the nut 9, the translation of the transmission screw rod in all directions is limited, the axial rotation of the transmission screw rod 4 is allowed, and a bolt hole is formed in one end of the transmission screw rod 4 and matched with the transmission pin 7, so that the transmission screw rod is conveniently screwed manually; as shown in fig. 6, which is a cross-sectional view of the fast centering structure, the T-shaped end of the centering rod 3 is engaged with the T-shaped groove of the frame 1, and the centering rod 3 is limited to move only in the transverse direction, so as to ensure the reliability of the experiment. The centering pull rod 3 is matched with the transmission screw rod 4 through the transmission threaded hole 26, so that the transverse free movement of the centering pull rod 3 is limited, and the rotation of the transmission screw rod can be converted into the transverse movement of the centering pull rod 3 by screwing the transmission pin 7. The positive direction position that can be quick, convenient change experiment extraction through the use of driving pin 7 realizes centering fast, effectual improvement efficiency of experiments, extension experiment variety.
When in use, an operator needs to firstly loosen the nut 9 on the eccentric pressing plate 2 and then put the two clamping ends of the fabric into the gap between the clamping groove 17 and the pressing plate cambered surface 22 shown in figure 5; pressing the eccentric pressing plate 2 to preliminarily clamp the fabric; the nut 9 on the eccentric pressing plate 2 is screwed until the fabric can not slide out from the clamping end; screwing down a nut 9 matched with the pre-tightening screw 6, and applying pre-tightening force until the pre-tightening force required by the experiment is achieved; preliminarily rotating the transmission pin 7, and moving the centering pull rod 3 to a position close to the position needing to be drawn; mounting the fabric and the clamp on an experimental machine, and finely adjusting the transmission pin 7 until the centering pull rod 3 and the experimental drawn yarn are positioned at the same vertical position; finally, the operator can carry out the drawing experiment.
Claims (6)
1. A quick-release and quick-centering fabric self-locking experimental clamp comprises a frame (1), two eccentric pressing plates (2), a centering pull rod (3), a transmission screw (4), a movable clamp seat (5), a pre-tightening screw (6), a transmission pin (7), a screw (8), a nut (9) and a stud (10); the method is characterized in that: the frame (1) is hollow, the eccentric pressing plate (3) is hinged to the pressing plate support (16) through threaded holes at two ends, the centering pull rod (3) is in clearance fit with the T-shaped groove (18) and is in threaded connection with the transmission screw (4), the transmission screw (4) is in clearance fit with the transmission support (15), the translation position of the transmission screw (4) is limited through the nut (9), the guide rail groove (24) of the movable clamp seat (5) is in sliding fit with the guide rail (13) of the frame (1), the pre-tightening screw hole (25) is in threaded connection with the pre-tightening screw (6), the pre-tightening screw (6) is in clearance fit with the pre-tightening through hole (20), and pre-tightening is performed through the nut (9).
2. The quick-release and quick-centering fabric self-locking experimental fixture as claimed in claim 1, wherein the eccentric pressing plate (2) is of a water-drop-like type, one surface is a plane, and the other surface is a convex arc surface structure, namely a pressing plate arc surface (22).
3. The quick-release and quick-centering fabric self-locking experimental fixture as claimed in claim 1, wherein a central axis of the hinge screw hole (21) of the eccentric pressing plate (2) does not coincide with a circular axis of the pressing plate arc surface (22).
4. The quick-release and quick-centering fabric self-locking experimental fixture as claimed in claim 1, wherein a fastening notch (23) is formed in the middle of the eccentric pressing plate (2), and the length of the fastening notch (23) is much greater than the diameter of the stud (10).
5. The quick-release and quick-centering fabric self-locking experimental fixture as claimed in claim 1, wherein the bottom of the centering pull rod (3) is of a T-shaped structure, and is in clearance fit with the T-shaped groove (18), and meanwhile, the centering pull rod (3) can freely slide in the T-shaped groove (18).
6. The quick-release and quick-centering fabric self-locking experimental fixture as claimed in claim 1, wherein a transmission threaded hole (26) is formed in the middle of the centering pull rod (3) and is in threaded fit with the transmission screw (4) to realize transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111068749.6A CN113670711A (en) | 2021-09-13 | 2021-09-13 | Quick-release and quick-centering fabric self-locking experimental clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111068749.6A CN113670711A (en) | 2021-09-13 | 2021-09-13 | Quick-release and quick-centering fabric self-locking experimental clamp |
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| CN113670711A true CN113670711A (en) | 2021-11-19 |
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| CN202111068749.6A Pending CN113670711A (en) | 2021-09-13 | 2021-09-13 | Quick-release and quick-centering fabric self-locking experimental clamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116372617A (en) * | 2023-06-07 | 2023-07-04 | 辽宁华天航空科技股份有限公司 | Work fixture for reducing machining error of notch structure |
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| CN116372617B (en) * | 2023-06-07 | 2023-08-08 | 辽宁华天航空科技股份有限公司 | Work fixture for reducing machining error of notch structure |
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