CN2233581Y - Flexible pivot torsional rigidity tester - Google Patents
Flexible pivot torsional rigidity tester Download PDFInfo
- Publication number
- CN2233581Y CN2233581Y CN 95211618 CN95211618U CN2233581Y CN 2233581 Y CN2233581 Y CN 2233581Y CN 95211618 CN95211618 CN 95211618 CN 95211618 U CN95211618 U CN 95211618U CN 2233581 Y CN2233581 Y CN 2233581Y
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- China
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- torquemeter
- flexible pivot
- torsional rigidity
- pivot
- pulley
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Abstract
The utility model relates to a flexible pivot torsional rigidity tester, comprising a base, an optical dividing head which is fixed on the base and an auto-collimation theodolite. A pulley type torquemeter is arranged on the movable end of the flexible pivot which is clamped on the optical dividing head, and the flexible pivot is arranged on the fixed end of the tester, two weight disks with equal weights and the weights which are in the weight disks are hung on the two sides of the torquemeter, damping disks which are soaked in an oil damping groove are respectively arranged on the lower ends of the weight disks, the auto-collimation theodolite is arranged on the left side or the right side of the torquemeter and keep a certain distance with the torquemeter, and the telescope head of the auto-collimation theodolite is just faced to the auto-collimation reflecting mirror which is on the torquemeter. The utility model has simple structure, convenient operation and accuracy and high efficient testing, and the tested pivots can not be damaged.
Description
The utility model is put it briefly and is related to a kind of metering outfit that adopts optical means to measure, and specifically relates to a kind of device that measures corner.
Flexible pivot is the critical elements in some precision instrumentation, and as the flexible pivot that uses in the satellite control system, its precision height, life-span length will directly influence the control accuracy and the serviceable life of satellite.The flexible pivot of a kind of hook switch formula that uses on the satellite is shown in Fig. 5-6 at present.This pivot is by two tube-like pieces, semi-circular and hook switch are formed up and down.During use, when there was relative rotation at the two ends of pivot, the side-play amount that the axle center at two ends will produce a principle was directly proportional with pivot two ends relative rotation.In order to guarantee the reliability of pivot work, service precision and life-span, must carry out strictness to its torsional rigidity and test exactly.Therefore, when the torsional rigidity of the flexible pivot of test, require the moved end of tested flexible pivot to float, can not limit the skew in relative fixed end axle center, axle center, moved end, otherwise not only can influence measuring accuracy, but also can damage tested pivot.And the torsional rigidity testing apparatus of using at present all can not make the pivot moved end be in quick condition, can't accurately measure the torsional rigidity of flexible pivot.
The purpose of this utility model can make the pivot moved end be in quick condition when being to provide a kind of test, does not limit the skew in relative fixed end axle center, axle center, flexible pivot moved end, can accurately measure the flexible pivot torsional rigidity tester of pivot torsional rigidity.
Flexible pivot torsional rigidity tester of the present utility model, comprise base, be fixed on optical dividing head and autocollimation theodolite on the base, on the moved end of the flexible pivot in its stiff end is installed on described optical dividing head dop the pulley-type torquemeter is housed, several gravity counterweights that make torquemeter generation corner that are lifted with two equiponderant scale pans and are mounted in it by the cotton rope on the torquemeter annular groove in the left and right sides of described torquemeter, the lower end of described scale pan is respectively equipped with the dampened disk that is immersed in the oil damping groove, described autocollimation theodolite be located at described torquemeter about any side and leave suitable distance with it, its telephoto lens faces the autocollimator reflective mirror on the described torquemeter.
Flexible pivot torsional rigidity tester of the present utility model, simple in structure, easy to operate.Have only stiff end to be clamped in the dop of optical dividing head owing to tested pivot during test, the moved end is in quick condition, therefore when the pivot two ends produced relative rotation, the desaxe at two ends was unrestricted, thereby had guaranteed the injury-free accuracy with test data of the hook switch of pivot.This flexible pivot torsional rigidity tester is provided with damping unit in addition, and the swing of pivot moved end is stopped very soon, has not only improved testing efficiency but also improved measuring accuracy.Because of using autocollimation theodolite to carry out non-contact measurement, pivot is not applied any additional ergometry, again so further improved measuring accuracy again.
Other details of the present utility model can be cheer and bright by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings, wherein:
Fig. 1 is the front view of flexible pivot torsional rigidity tester of the present utility model;
Fig. 2 is the vertical view of flexible pivot torsional rigidity tester of the present utility model;
Fig. 3 is the front view of the torquemeter of flexible pivot torsional rigidity tester of the present utility model;
Fig. 4 is the vertical view of torquemeter shown in Figure 3;
Fig. 5 is the front view of flexible pivot;
Fig. 6 is the side view of flexible pivot;
With reference to Fig. 1～Fig. 4.Optical dividing head 2 is housed on base 1, and the stiff end 31 of tested pivot 3 is installed in the dop 21 of optical dividing head 2, and pulley-type torquemeter 4 is housed on the moved end 32.The structure of torquemeter 4 as shown in Figure 3-4.Be shaped on ring groove 41 (preferably V-ring groove) on it, autocollimator reflective mirror 42 is equipped with in both sides.Torquemeter 4 the most handy duralumin are made, and in order to alleviate own wt, have several circular holes 43 on it.In the V-ring groove 41 of pulley-type torquemeter 4, by two equiponderant scale pans 5 of cotton rope 6 (preferably nylon wire) lifting.One end of nylon wire 6 ties up on the pin 44 of torquemeter 4, and the other end is connected on the scale pan 5.Because nylon wire 6 is in the V-type groove 41 of moment of torsion 4, so scale pan is in nature hanging state, respectively is provided with 7, two dampened disks 7 of a dampened disk in the lower end of two scale pans 5 and is placed on the same fluid that is equipped with, for example in positive Buddhist nun's groove 8 of bobbin oil.On the base 1 about dividing head 2 any side (being illustrated as the right side) autocollimation theodolite 9 is housed.The telephoto lens of autocollimation theodolite 9 faces the autocollimation theodolite reflective mirror 42 on the torquemeter 4 and leaves suitable distance with it.In fact flexible pivot torsional rigidity tester of the present utility model comprises pulley-type torquemeter 4, scale pan 5, what the gravity counterweight was formed applies the metering system of moment of torsion to the pivot moved end, by dampened disk 7, what oil groove 8 was formed applies the damping system of damping to pivot moved end runout, and by the autocollimator reflective mirror 42 on the pulley-type torquemeter 4, the metering system that pivot two ends relative rotation is measured that autocollimation theodolite 9 and optical dividing head 2 formed.
When using tester of the present utility model to test, at first to determine the zero-bit angle of tested pivot 3.Adjust transit 9, make it be in 90 ° 00 ' 00 "; rotate optical dividing head 2; drive pulley-type torquemeters 4 by pivot 3 reflective mirror 42 is turned to till graticule cross curve on reflection cross curve and the telescope coincides; tentatively be defined as the zero position of testing angle of pivot; swing gently pulley-type torquemeter 4 again; can observation get back to the preliminary zero-bit of determining exactly, as not returning zero, readjust optical dividing head 2 again, until swing pulley-type torquemeter 4 gently and can both get back to till the zero-bit exactly for three times.Zero-bit determines whether correctly will directly have influence on the accuracy of test data, whether the check zero-bit determines that method is accurately: load, unload, after the zero-bit sluggishness is eliminated in 4 swings to the pulley-type torquemeter, can accurately get back to zero-bit, if can get back to original determined zero-bit, what prove then that original zero-bit determines is correct.
After zero-bit is determined, on right scale pan 5, add counterweight, make pulley-type torquemeter 4 out of trim that are installed in pivot moved end 32, imposing on 32 1 of pivot moved ends is that the arm of force, weights gravity are the moment of torsion M of torsion with pulley-type torquemeter V-shaped groove inside radius, and make the pivot two ends produce one with the corresponding clockwise elasticity corner of adding moment of torsion.Drive reflective mirror 42 by pulley-type torquemeter 4 and rotate an onesize corner to clockwise direction, adjust transit 9, the cross curve that reflects is overlapped with cross curve on the graticule, the difference at the angle of this transit and zero-bit angle is the angle that reflective mirror is changeed in the direction of the clock, just the relative resilient rotational angle theta at pivot two ends.Thereby can calculate flexible pivot 3 clockwise elasticity of torsion stiffness K by following formula.
K＝M/Q(N·mm/deg)
If on the scale pan 5 in left side, add counterweight, then can test out anticlockwise elasticity of torsion stiffness K with above-mentioned same method.
This flexible pivot torsional rigidity tester is because the object elasticity of torsion rigidity of test is very low, only have about 0.402Nmm/deg, and the moved end is in quick condition again, therefore after adding counterweight on the scale pan, does not stop for a long time with 4 swings of pulley-type torquemeter the moved end of pivot, and could measure its elasticity rotational angle theta exactly after only coming to a complete stop.In order to make it to stop swinging quickly, improve testing efficiency, in the bottom of two scale pans 5 dampened disk 7 is housed respectively, and these two dampened disks 7 are put into same oil damping groove 8, pulley-type torquemeter 4 has been added suitable damping.The oil damping groove is wanted suitably the damping size of torquemeter 4 swings, the too little detection efficiency of damping is low, though the too big torquemeter of damping stops very fast, the testing efficiency height, but usually can not stop at physical slot, and an additional angle is arranged, and influence measuring accuracy, what directly influence the damping size is the diameter and the oil viscosity of dampened disk.
The measuring accuracy of this flexible pivot torsional rigidity tester depends primarily on the pivot moved end is applied the metering system of moment of torsion and the metering system that pivot two ends relative rotation is measured.Because counterweight can be accurate to ten thousand/gram, pulley-type torquemeter V-shaped groove internal diameter can be accurate to per mille mm (micron order), therefore can be accurate to 0.0001g * 0.0001mm=0.0000001gmm by the pulley-type torquemeter to the moment of torsion that the pivot moved end is applied, promptly be accurate to 1/10000000th gram millimeter.The precision of the metering system that pivot two ends relative resilient corner is measured depends primarily on the measuring accuracy of transit, and its precision can reach 5 ", its measuring accuracy satisfies the test request of space flight level product fully.
Tester of the present utility model is applicable to the flexible pivot of various miniature or small-sized hook switch formulas, the test of the elasticity of torsion rigidity of elastic bearing etc.
Claims (4)
1. flexible pivot torsional rigidity tester, comprise base (1), be fixed on the optical dividing head (2) on the described base (1), it is characterized in that on described base (1), also being provided with autocollimation theodolite (9), on the moved end of the flexible pivot (3) in its stiff end is installed on the dop of described optical dividing head pulley-type torquemeter (4) is housed, several gravity counterweights that make torquemeter generation corner that are lifted with two equiponderant scale pans (5) and are mounted in it by the cotton rope on described torquemeter annular groove in the left and right sides of described torquemeter (4), the lower end of described scale pan is respectively equipped with the positive Buddhist nun's dish (7) that is immersed in the oil damping groove (8), described autocollimation theodolite (9) be located at described torquemeter about any side and leave suitable distance with it, its telephoto lens faces the autocollimator reflective mirror (42) on the described torquemeter.
2. according to the described flexible pivot torsional rigidity tester of claim 1, it is characterized in that the annular groove on the described pulley-type torquemeter (4) is the V-ring groove.
3. according to claim 1 or 2 described flexible pivot torsional rigidity testers, it is characterized in that described pulley-type torquemeter (4) makes of duralumin.
4. according to the described flexible pivot torsional rigidity tester of claim 3, it is characterized in that the fluid in the described oil damping groove (8) is bobbin oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95211618 CN2233581Y (en) | 1995-05-23 | 1995-05-23 | Flexible pivot torsional rigidity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95211618 CN2233581Y (en) | 1995-05-23 | 1995-05-23 | Flexible pivot torsional rigidity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2233581Y true CN2233581Y (en) | 1996-08-21 |
Family
ID=33862030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95211618 Expired - Fee Related CN2233581Y (en) | 1995-05-23 | 1995-05-23 | Flexible pivot torsional rigidity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2233581Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101248B (en) * | 2007-07-20 | 2010-05-19 | 上海应用技术学院 | Adjustable clamping device of minisize torsional rod rigidity test |
| CN103134723A (en) * | 2013-02-20 | 2013-06-05 | 浙江花园电子器材有限公司 | Corrugated tube rigidity tester |
| CN103759892A (en) * | 2014-01-27 | 2014-04-30 | 杭州集智机电股份有限公司 | Soft supporting balance test machine with oil mixing damping mechanisms |
| CN103926073A (en) * | 2013-01-11 | 2014-07-16 | 劲力工业有限公司 | Speed reducer torsion testing machine |
| CN112595602A (en) * | 2020-11-13 | 2021-04-02 | 河北汉光重工有限责任公司 | Device and method for detecting rigidity of flexible joint of gyroscope |
| CN113324685A (en) * | 2021-06-25 | 2021-08-31 | 华中科技大学 | Non-contact torque sensor |
-
1995
- 1995-05-23 CN CN 95211618 patent/CN2233581Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101248B (en) * | 2007-07-20 | 2010-05-19 | 上海应用技术学院 | Adjustable clamping device of minisize torsional rod rigidity test |
| CN103926073A (en) * | 2013-01-11 | 2014-07-16 | 劲力工业有限公司 | Speed reducer torsion testing machine |
| CN103134723A (en) * | 2013-02-20 | 2013-06-05 | 浙江花园电子器材有限公司 | Corrugated tube rigidity tester |
| CN103759892A (en) * | 2014-01-27 | 2014-04-30 | 杭州集智机电股份有限公司 | Soft supporting balance test machine with oil mixing damping mechanisms |
| CN112595602A (en) * | 2020-11-13 | 2021-04-02 | 河北汉光重工有限责任公司 | Device and method for detecting rigidity of flexible joint of gyroscope |
| CN113324685A (en) * | 2021-06-25 | 2021-08-31 | 华中科技大学 | Non-contact torque sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |