CN104200723B - Contact is from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology - Google Patents
Contact is from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology Download PDFInfo
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- CN104200723B CN104200723B CN201410457436.3A CN201410457436A CN104200723B CN 104200723 B CN104200723 B CN 104200723B CN 201410457436 A CN201410457436 A CN 201410457436A CN 104200723 B CN104200723 B CN 104200723B
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Abstract
The present invention relates to a kind of pendulum device, particularly to a kind of contact from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology.The technical scheme is that take a segment length be 7cm, transverse section be the strip steel triangular prism of equilateral triangle of the length of side 5, V-arrangement complications are bent out by cylinder longitudinal axis midpoint, the longitudinal axis of the triangular prism at V-arrangement complications two ends is still on same straight line, the plane that outer folding face is former triangular prism that V-arrangement is tortuous, the depression of V-arrangement complications is then made up of a rib bending of former triangular prism, V-arrangement concave bottom angle is 90 °, the degree of depth of V-arrangement depression is 6, the rotating shaft made is inserted in the shaft hole of physical pendulum support upper cross-beam termination.The present invention can not only reduce measurement error can also be greatly lowered the manufacturing cost of instrument.
Description
Technical field
The present invention relates to a kind of pendulum device, particularly to a kind of contact from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology.
Background technology
Currently known physical pendulum is made up of two parts: one is fork, and two is support, and wherein the profile of fork is a square gold of block length
Belong to plate, plate is dispersed with dozens of manhole along the longitudinal centerline.Experiment is by the borehole jack of fork horizontal stroke above support
On the triangular prism disposed, the top in fork hole then rib above triangular prism is combined, and releases when fork lower end is pulled away from equilbrium position
After putting, fork begins to swing.According to experimental principle, this swing must be the steady swing in a kind of perpendicular, with this
The error of the acceleration of gravity measured will tend to minimum.But reality is: owing to fork thickness reaches 5mm, so fork hole and triangular prism
Combination be exactly the combination of two straight lines.Owing to the criterion of the vertically degree regulation of support is to rely on a bubble on its base
The level indicator of cell structure, the accuracy of this level indicator then places one's entire reliance upon the accurate installation of level indicator, yet with this structure
The self-defect of level indicator, it is impossible to accurately installing, even accurately installing, that the most only reflects the levelness of base,
And do not represent the levelness of triangular prism above support, because further relating to bracket upright post and the combination of base and triangular prism among these
The accuracy of the combination with its pedestal, for above-mentioned reasons, even the bubble in bubble chamber is placed in the middle, does not the most represent triangular prism
Top rib is in level, so actual effect is: student has spent the substantial amounts of time that bubble is adjusted to center, and above triangular prism
Rib the most not level, thus causing the top in fork hole is not preferable linear contact lay with contacting of rib above triangular prism, but a kind of
Point cantact.It is important that this contact point is not in the central point on top, fork hole, and it is in a certain termination on top, hole, this
In the case of the fork that hangs be impossible to be in vertical state, so once swinging, the most inevitably occur significantly turning round
Dynamic, ultimately cause bigger measurement error.The present inventor three in SEPARATE APPLICATION on November 1 in 2006 prevents physical pendulum fork from twisting
Technical scheme application number be respectively 200610022164.X；200610022160.1；200610022157.X, these three scheme
Common ground be the midpoint allowing the contact point of physical pendulum fork hole and rotating shaft be in fork hole wall, make the fork being in suspension in static state
Under be in vertically, thus eliminate the key factor producing twisting.But long-term teaching practice shows, such scheme pair
It is feasible in the teacher having operating experience, and many students are owing to controlling not in lead when fork is pulled away from equilbrium position
When, create deflection, so fork still has twisting phenomenon after being released.
Summary of the invention
It is an object of the invention to provide a kind of contact from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology, to improve physical pendulum in swing
Stability.
The object of the present invention is achieved like this:
Contact is to seek formula zero moment of torsion physical pendulum rotating shaft processing technology as follows: take a segment length be 7cm, transverse section be the length of side 5 etc.
The strip steel triangular prism of limit triangle, is bent out V-arrangement complications, the three of V-arrangement complications two ends by cylinder longitudinal axis midpoint
The longitudinal axis of prism still on same straight line, the plane that outer folding face is former triangular prism that V-arrangement is tortuous, and V-arrangement is tortuous
Depression is then made up of a rib bending of former triangular prism, and V-arrangement concave bottom angle is 90 °, and the degree of depth of V-arrangement depression is 6, will system
The rotating shaft performed is inserted in the shaft hole of physical pendulum support upper cross-beam termination.
Use such scheme can receive following remarkable result:
1, due to the top rib forming V-shape of rotating shaft, so after the circular port of fork is inserted in rotating shaft, once fork being pulled away from balance position
Putting and discharged, fork is in swing process, because of by action of gravity, connecing of a certain incline that the top in fork hole and V-arrangement cave in
Contact will necessarily glide along this incline, until another incline caved in V-arrangement in the top in fork hole contacts simultaneously, and this two contact points meeting
Rotated in 10 seconds with the swing of fork and be adjusted on same level line, through prolonged and repeated observation, after fork starts to swing certainly,
Its twisting phenomenon can disappear in 10 seconds automatically, and becomes the steady swing in same vertical plane, is finally reached reduction
The purpose of measurement error.
2, due to V-arrangement rotating shaft can realize fork automatic vertical regulation, so physical pendulum support Design with making in can be big
Relax greatly machining accuracy and the quality of fit of each parts, it is thus possible to the manufacturing cost of instrument is greatly lowered.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Contact is to seek formula zero moment of torsion physical pendulum rotating shaft processing technology as follows: take a segment length be 7cm, transverse section be the length of side 5 etc.
The strip steel triangular prism of limit triangle, is bent out V-arrangement complications, the three of V-arrangement complications two ends by cylinder longitudinal axis midpoint
The longitudinal axis of prism still on same straight line, the plane that outer folding face is former triangular prism that V-arrangement is tortuous, and V-arrangement is tortuous
Depression is then made up of a rib bending of former triangular prism, and V-arrangement concave bottom angle is 90 °, and the degree of depth of V-arrangement depression is 6, will system
The rotating shaft performed is inserted in the shaft hole of physical pendulum support upper cross-beam termination.
Claims (1)
1. contact is from seeking a formula zero moment of torsion physical pendulum rotating shaft processing technology, it is characterized in that: taking a segment length is 7cm, transverse section
For the strip steel triangular prism of the equilateral triangle of the length of side 5, cylinder longitudinal axis midpoint bend out V-arrangement complications, V
The longitudinal axis of the triangular prism at shape complications two ends, still on same straight line, is put down for one that outer folding face is former triangular prism of V-arrangement complications
Face, the depression of V-arrangement complications is then made up of a rib bending of former triangular prism, and V-arrangement concave bottom angle is 90 °, V-arrangement depression
The degree of depth is 6, the rotating shaft made is inserted in the shaft hole of physical pendulum support upper cross-beam termination, and the circular port of fork is inserted in rotating shaft
After, fork is pulled away from equilbrium position and is discharged, fork is in swing process, by action of gravity, the top of the circular port of fork
The contact point of a certain incline that portion and V-arrangement cave in glides along this incline, until what caved in V-arrangement in the top of the circular port of fork simultaneously
Another incline contacts, and this two contact point rotated in 10 seconds with the swing of fork and is adjusted on same level line, and fork is from starting
After swing, its twisting phenomenon disappeared in 10 seconds automatically, became the steady swing in same vertical plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457436.3A CN104200723B (en) | 2014-09-10 | 2014-09-10 | Contact is from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457436.3A CN104200723B (en) | 2014-09-10 | 2014-09-10 | Contact is from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104200723A CN104200723A (en) | 2014-12-10 |
| CN104200723B true CN104200723B (en) | 2016-09-28 |
Family
ID=52086007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410457436.3A Active CN104200723B (en) | 2014-09-10 | 2014-09-10 | Contact is from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104200723B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ238798A (en) * | 1990-08-30 | 1993-11-25 | Mitsubishi Heavy Ind Ltd | Low height long period pendulum damping equipment for tall buildings |
| US5145378A (en) * | 1990-11-29 | 1992-09-08 | Hands On Instruments | Pendulum principle demonstration apparatus |
| CN100511327C (en) * | 2006-11-01 | 2009-07-08 | 四川大学 | Combined twistless compound pendulum |
| CN100492442C (en) * | 2006-11-01 | 2009-05-27 | 四川大学 | Twistless compound pendulum rod |
| CN100492441C (en) * | 2006-11-01 | 2009-05-27 | 四川大学 | Composite twistless compound pendulus rod |
-
2014
- 2014-09-10 CN CN201410457436.3A patent/CN104200723B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104200723A (en) | 2014-12-10 |
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Effective date of registration: 20170524 Address after: 226156 Nantong Binhai New Area, Haimen City, Hong Kong West Road, No. 999, No. Patentee after: HAIMEN HUANGHAI PIONEER PARK SERVICES CO., LTD. Address before: 315100 Zhejiang, Yinzhou District, Zhong Gong Temple Street, Zhong Wang Road, room 55, No. 1004, room Patentee before: Ningbo Yinzhou Qinglin Medical Devices Technology Consulting Co.,Ltd. |
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| TR01 | Transfer of patent right |