CN104634648A - Pendant tensile test fixture - Google Patents
Pendant tensile test fixture Download PDFInfo
- Publication number
- CN104634648A CN104634648A CN201310573195.4A CN201310573195A CN104634648A CN 104634648 A CN104634648 A CN 104634648A CN 201310573195 A CN201310573195 A CN 201310573195A CN 104634648 A CN104634648 A CN 104634648A
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- CN
- China
- Prior art keywords
- lanyard
- measurement jig
- tension measurement
- jig according
- diapire
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a pendant tensile test fixture. The fixture is used for positioning a torch with a pendant to test the pull force of the pendant, and comprises pins, two racks arranged on the pins and a fixing part, wherein the fixing part comprises a bottom wall and two side walls arranged on the bottom wall; at least three placement holes are formed in one end of the bottom wall, and at least three torches are put on the bottom wall and clamped by the two side walls; and the pendants of the at least three torches pass through the placement holes and vertically fall relatively to the bottom wall.
Description
Technical field
The present invention relates to a kind of lanyard tension measurement jig.
Background technology
Electric torch is illumination compact electric apparatus conventional during people live, for convenience of user easy to carry and avoid electric torch to fall, stay cord can be hung with in the end of electric torch, and some users can haul stay cord to swing electric torch when carrying, stay cord particularly can be made certain pulling force is subject to when perpendicular moves in a circle, so can test the tensile strength of stay cord during fabrication, if electric torch is placed not steady, easy impact test effect, and fixing flashlight tests affect testing efficiency more one by one.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of lanyard tension measurement jig improving testing efficiency.
In order to solve the problems of the technologies described above, the invention provides a kind of lanyard tension measurement jig, for locate there is lanyard electric torch to test the pulling force of lanyard, described tool comprises leg, be loaded on two supports of leg and be loaded on the fixed part of two bracket end, described fixed part comprises the sidewall that diapire and two are located at diapire, described diapire one end is provided with at least three putting holes, and described at least three putting holes are used for passing through of at least three lanyards.
Wherein, described lanyard free end for hanging the scale pan with counterweight, to test the pulling force of described lanyard.
Wherein, described tool also comprises fender rod, and the surface that described two supports are relative is provided with chute, described fender rod two ends slide be loaded on described two supports chute in and adjustable position on support.
Wherein, the sidepiece at described fender rod two ends is equiped with stator, and described stator is fixed on described support by screw.
Wherein, described fender rod has certain distance degree with the scale pan being hung on described lanyard.
Wherein, described diapire two ends are fixed on bracket end and are be arranged in parallel with described fender rod.
Wherein, described putting hole is oval or waist through hole, and described putting hole length is 8mm.
Wherein, described two supports are fixed on described leg opposite end by welding manner.
Wherein, described diapire prevents at least three electric torchs, and clamped by described two sidewalls, the lanyard of described at least three electric torchs is vertical drop state through described putting hole.
Wherein, measure the quality of described electric torch and the length of lanyard, and follow according to the centripetal force of circular motion and law of conservation of energy to show that described lanyard to move in a circle suffered maximum value of thrust at described electric torch, by counterweight, the pulling force of described value of thrust is greater than and certain time to lanyard increase, whether ruptures to detect lanyard tension.
Tool provided by the invention can test multiple lanyard simultaneously, improves testing efficiency, and can ensure the plateau of electric torch, makes lanyard can be positioned at vertical state, ensure that the accuracy of test.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the lanyard tension measurement jig that the embodiment of the present invention provides.
Fig. 2 is the schematic diagram that tool shown in Fig. 1 is equipped with electric torch.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, embodiment of the present invention provides a kind of lanyard tension measurement jig 100 for the tensile strength of the lanyard 55 of subtest electric torch 50.This tool 100 comprises leg 10, is loaded on two supports 15 of leg 10, fender rod 17 and fixed part 20.Described fixed part 20 is loaded on support 15, for fixing flashlight 50.Described lanyard 55 passes described fixed part 20 in vertical direction free falling body state.Test counterweight 60 is loaded on lanyard end to detect lanyard tensile property.Specific as follows:
Described two supports 15 are the body of rod, are individually fixed in the two ends that described leg 10 is relative.The side that described support 15 is relative is provided with chute 151 along support 15.Described fender rod 17 two ends are slidably loaded in described chute 151, and are fixed by screw, to adjust the height of described fender rod 17 on support 15.In the present embodiment, by the stator 171 of sidepiece installing " L " type at fender rod 17 two ends, by screw, stator 171 is locked on support 15.
In the present embodiment, described fixed part 20 is the channel-shaped of both ends open, they two opposing sidewalls 22 comprising diapire 21 and be located at diapire 21.Described diapire 21 is provided with at least three putting holes 23.In the present embodiment, described putting hole 23 is three and oval or kidney-shaped, and it is spaced apart, and to be located at diapire upper.The length of putting hole 23 described in the present embodiment is 8mm.The two ends of described diapire 21 are fixed on the end of described two supports 15 by modes such as welding and be arranged in parallel with described fender rod 17.
Join Fig. 2 again, when carrying out tension test to described lanyard 55, first provide several counterweight 60, measure the quality m of the electric torch 50 and length L of lanyard 55.The value of tensile force f suffered by lanyard when showing that described electric torch 50 is positioned at minimum point when moving in a circle according to the centripetal force of circular motion and law of conservation of energy again, namely lanyard 55 is subject to maximum value of thrust.
Being specially, is acceleration of gravity according to G=mg(g) calculate the gravity G of electric torch 50, it is 0 that electric torch 50 is subject to lanyard 55 tensile force f when peak draws, and the centripetal force of electric torch 50 is the gravity G of electric torch 50, by centripetal force formula F
to=G=mg=mV
1 2l draws
(V
1for peak speed when electric torch moves in a circle); Electric torch is W at the energy of peak
high, the energy of minimum point is W
low, according to law of conservation of energy, W
high=W
low, i.e. 12mV
1 2+ 2mgL=12mV
2 2, and then draw
(V
2for minimum point speed when electric torch moves in a circle).Electric torch when minimum point under tension F by the centripetal force F of minimum point
to=F-G=mV
2 2l, draws F=mV
2 2l+G; By above-mentioned V
2bring into and can draw F=6mg.The maximum pull value that this F value is born when the electric torch 55 that quality is m moves in a circle and is positioned at for described lanyard 55, is critical value, only when the tensile force f >=6mg born of described lanyard 55, just can not be pulled off when electric torch moves in a circle.
Then, provide three described electric torchs 50 to test, be loaded on by described electric torch 50 in described fixed part 20 and clamped by two sidewalls 22, and lie on diapire 21 by described cord by electric torch, now electric torch 50 is in plateau simultaneously; Scale pan 65, through the vertical drop of described putting hole 23, is hung on the end of each lanyard 55 by described lanyard.Described fender rod 17 has certain distance degree with the scale pan 65 being hung on described lanyard 55.
First first group of counterweight 60 is loaded on scale pan 65, makes counterweight 60 be 7mg with the total force of scale pan 65, and keep 55 minutes.Equally the lanyard of another two electric torchs 50 is loaded onto counterweight 60, total gravity is respectively 8mg and 10mg.The time of 55 minutes is maintained after each lanyard hangs up counterweight.In the process, guard bar 17 is adjusted to the distance that distance three scale pans 65 are 20 millimeters, so that scale pan 65 is caught by described fender rod 17 when lanyard 55 described in test process ruptures, prevents it from dropping and accidentally injure tester.
Finally, observe lanyard state: do not rupture be subject to the pulling force of 7mg, 8mg and 10mg at lanyard under, illustrate that the tensile property of lanyard and lanyard installation position meets electric torch and does the use of normal circular motion.
Do not rupture be subject to the pulling force of 10mg at lanyard under, the abnormal request for utilization that the tensile property of lanyard and lanyard installation position meets electric torch completely and circles is described, safe and reliable.
In sum, tool 100 of the present invention can be tested the lanyard colleague that three are born different pulling force simultaneously, do not need to change the electric torch on tool, improve testing efficiency, and when the lanyard 55 of flashlight 50 is tested, fix electric torch 50 by tool 100, the plateau of electric torch 50 can be ensured, make lanyard 55 can be positioned at vertical state, ensure that the accuracy of test; And described support 15 is equipped with fender rod 17, catches scale pan 65 when lanyard 55 ruptures, avoid accidentally injuring tester.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a lanyard tension measurement jig, for locate there is lanyard electric torch to test the pulling force of lanyard, it is characterized in that, described tool comprises leg, be loaded on two supports of leg and be loaded on the fixed part of two bracket end, described fixed part comprises the sidewall that diapire and two are located at diapire, described diapire one end is provided with at least three putting holes, and described at least three putting holes are used for passing through of at least three lanyards.
2. lanyard tension measurement jig according to claim 1, is characterized in that, described lanyard free end for hanging the scale pan with counterweight, to test the pulling force of described lanyard.
3. lanyard tension measurement jig according to claim 1, it is characterized in that, described tool also comprises fender rod, and the surface that described two supports are relative is provided with chute, described fender rod two ends slide be loaded on described two supports chute in and adjustable position on support.
4. lanyard tension measurement jig according to claim 3, is characterized in that, the sidepiece at described fender rod two ends is equiped with stator, and described stator is fixed on described support by screw.
5. lanyard tension measurement jig according to claim 4, is characterized in that, described fender rod has certain distance degree with the scale pan being hung on described lanyard.
6. lanyard tension measurement jig according to claim 3, is characterized in that, described diapire two ends are fixed on bracket end and are be arranged in parallel with described fender rod.
7. lanyard tension measurement jig according to claim 2, is characterized in that, described putting hole is oval or waist through hole.
8. lanyard tension measurement jig according to claim 2, is characterized in that, described two supports are fixed on described leg opposite end by welding manner.
9. lanyard tension measurement jig according to claim 6, is characterized in that, described diapire prevents at least three electric torchs, and is clamped by described two sidewalls, and the lanyard of described at least three electric torchs is vertical drop state through described putting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310573195.4A CN104634648A (en) | 2013-11-15 | 2013-11-15 | Pendant tensile test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310573195.4A CN104634648A (en) | 2013-11-15 | 2013-11-15 | Pendant tensile test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104634648A true CN104634648A (en) | 2015-05-20 |
Family
ID=53213643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310573195.4A Pending CN104634648A (en) | 2013-11-15 | 2013-11-15 | Pendant tensile test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104634648A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806607A (en) * | 2016-03-25 | 2016-07-27 | 苏州德智亚自动化科技有限公司 | Gas spring tensile property detecting device |
| CN106644787A (en) * | 2016-12-07 | 2017-05-10 | 莱茵技术（上海）有限公司 | Device for fatigue testing of toothbrush holder |
| CN106744323A (en) * | 2016-12-23 | 2017-05-31 | 上海致远绿色能源股份有限公司 | A kind of rope impact experiment mechanism autocontrol method |
-
2013
- 2013-11-15 CN CN201310573195.4A patent/CN104634648A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806607A (en) * | 2016-03-25 | 2016-07-27 | 苏州德智亚自动化科技有限公司 | Gas spring tensile property detecting device |
| CN106644787A (en) * | 2016-12-07 | 2017-05-10 | 莱茵技术（上海）有限公司 | Device for fatigue testing of toothbrush holder |
| CN106744323A (en) * | 2016-12-23 | 2017-05-31 | 上海致远绿色能源股份有限公司 | A kind of rope impact experiment mechanism autocontrol method |
| CN106744323B (en) * | 2016-12-23 | 2018-06-05 | 上海致远绿色能源股份有限公司 | A kind of rope impact experiment mechanism autocontrol method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
|
| WD01 | Invention patent application deemed withdrawn after publication |