CN100511327C - Combined twistless compound pendulum - Google Patents
Combined twistless compound pendulum Download PDFInfo
- Publication number
- CN100511327C CN100511327C CNB2006100221601A CN200610022160A CN100511327C CN 100511327 C CN100511327 C CN 100511327C CN B2006100221601 A CNB2006100221601 A CN B2006100221601A CN 200610022160 A CN200610022160 A CN 200610022160A CN 100511327 C CN100511327 C CN 100511327C
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- support
- fork
- folding type
- type cone
- combined
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Abstract
The invention relates to a compound swing bar without twist. The rocker is made to be one left and one right structure, of which, the midpoint of one edge on two sides of semi-cylindrical concave is opened and combined with pin. The prism on the top of support is made to be the bended supporting awl to form a point contact between the hollow of the top of midpoint on rocker and the peak of bended supporting awl to make the rocker hang in a vertical state, thereby eliminating twisting, saving time, reducing the measure error and cost.
Description
One, technical field
The present invention relates to the physical pendulum in the physical experiment apparatus, the particularly a kind of physical pendulum that can eliminate twisting.
Two, background technology
Present known physical pendulum is made of two parts: the one, and fork, the 2nd, support, wherein the profile of fork is a block length square metal plate, the plate upper edge longitudinal centre line dozens of manhole that distributing.In the experiment be with the borehole jack of fork on the triangular prism that is laterally settled above the support, the top in fork hole then combines with the rib of triangular prism top, after the fork lower end was pulled away from the equilibrium position and discharges, fork just began swing.According to experimental principle, this swing must be the steady swing in a kind of perpendicular, will be tending towards minimum with the error of this acceleration of gravity of measuring.Yet reality is: because the thick 5mm that reaches of fork, so the fork hole is exactly the combination of two straight lines with combining of triangular prism.Because the criterion that the vertical degree of support is regulated is the level meter that relies on a bubble chamber structure on its base, then the place one's entire reliance upon accurate installation of level meter of the accuracy of this level meter, yet because the self-defect of the level meter of this structure, so can not accurately install, even accurately install, that also only reflects the levelness of base, and do not represent the levelness of triangular prism above the support, because this wherein also relates to the accuracy that combines of combining of bracket upright post and base and triangular prism and its pedestal, for above-mentioned reasons, even the bubble in the bubble chamber is placed in the middle, but do not represent triangular prism top rib to be in level, so actual effect is: the student has spent a large amount of time that bubble is transferred to the center, and the rib of triangular prism top is also out-of-level, thereby causing the top in fork hole is not desirable line contact with contacting of triangular prism top rib, but a kind of some contact.And contact point each other is not in the central point on top, fork hole, but being in a certain termination that push up in the hole, fork just can not be in vertical state in this case, so in case swing, just occur significantly twisting inevitably, finally cause bigger measuring error.
Three, summary of the invention
The purpose of this invention is to provide a kind of combined twistless compound pendulum, to eliminate the twisting of physical pendulum in swing process.
The object of the present invention is achieved like this: the physical pendulum fork that will finish drilling operating longitudinally center line with wire cutting machine tool to cutting away half piece, the midpoint of an incline that leans on suspended end of each the spill semicylinder on two half blocks is opened a breach respectively then, the width of breach is 1.5mm, the degree of depth is 1mm, be combined as a whole with the section of pin again two half blocks, the folding type cone of support is fixed on physical pendulum support top, the support section of folding type cone of support coning, circular cone bottom surface diameter is 3mm, length is 8mm, after fork was suspended in the folding type cone of support, the conical tip of folding type cone of support was in the depression that the breach by the same position of described two half blocks at top, fork hole forms.
Adopt such scheme can receive following remarkable result:
1, after the combination of two half block forks, must form a depression in the top in fork hole midpoint, and the awl point of folding type cone of support just in time is in this depression, making the way of contact between the two is the some contact of top, fork hole midpoint, so fork must be in vertical state after hanging, in case swing gets up just to be in naturally the interior swing of perpendicular.
2, because the diameter in fork hole less than 1.5cm, so want to produce a depression at the top in fork hole mid point, is a very difficult thing, adopt this programme then can solve this difficult problem easily.
3, this programme can also avoid fork in swing process from the folding type cone of support under the landing.
Four, description of drawings
Fig. 1 is the structural drawing of combined twistless compound pendulum;
Fig. 2 is the sectional view of combined twistless compound pendulum fork;
1 folding type cone of support among the figure, 2 supports, 3 pedestals, 4 forks, 5 pins.
Five, embodiment
With the physical pendulum fork (4) of finishing drilling operating longitudinally center line with wire cutting machine tool with it to cutting away half piece, the midpoint of an incline that leans on suspended end of each the spill semicylinder on two half blocks is opened a breach respectively then, the width of breach is 1.5mm, the degree of depth is 1mm, use pin (5) that the section of two half blocks is combined as a whole again, folding type cone of support (1) is fixed on physical pendulum support (2) top, the support section of folding type cone of support (1) coning, circular cone bottom surface diameter is 3mm, length is 8mm, after fork (4) was suspended in folding type cone of support (1), the conical tip of folding type cone of support was in the depression at fork (4) top, hole.
Claims (1)
1, a kind of combined twistless compound pendulum, by the folding type cone of support, support, pedestal, fork and pin constitute, it is characterized in that: the physical pendulum fork that will finish drilling operating longitudinally center line with wire cutting machine tool to cutting away half piece, the midpoint of an incline that leans on suspended end of each the spill semicylinder on two half blocks is opened a breach respectively then, the width of breach is 1.5mm, the degree of depth is 1mm, be combined as a whole with the section of pin again two half blocks, the folding type cone of support is fixed on physical pendulum support top, the support section of folding type cone of support coning, circular cone bottom surface diameter is 3mm, length is 8mm, after fork was suspended in the folding type cone of support, the conical tip of folding type cone of support was in the depression that the breach by the same position of described two half blocks at top, fork hole forms.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2006100221601A CN100511327C (en) | 2006-11-01 | 2006-11-01 | Combined twistless compound pendulum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2006100221601A CN100511327C (en) | 2006-11-01 | 2006-11-01 | Combined twistless compound pendulum |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1945659A CN1945659A (en) | 2007-04-11 |
CN100511327C true CN100511327C (en) | 2009-07-08 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB2006100221601A Expired - Fee Related CN100511327C (en) | 2006-11-01 | 2006-11-01 | Combined twistless compound pendulum |
Country Status (1)
Country | Link |
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CN (1) | CN100511327C (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102708735B (en) * | 2012-04-13 | 2014-02-19 | 四川大学 | Twisting-preventive compound pendulum contacting by circular spherical grooved surface |
CN102637377B (en) * | 2012-04-13 | 2014-02-19 | 四川大学 | Rotational inertia tester capable of measuring gravity acceleration |
CN102682646B (en) * | 2012-05-14 | 2013-11-27 | 四川大学 | Wiggle-free compound pendulum consisting of metal circular rings and circular clamping grooves |
CN103971569B (en) * | 2014-05-04 | 2016-03-02 | 四川大学 | Pressure extending physical pendulum pendulum length measures acceleration of gravity |
CN103985290A (en) * | 2014-05-04 | 2014-08-13 | 四川大学 | Method for measuring gravity acceleration by sleeving cylinder to increase compound pendulum length |
CN103971570B (en) * | 2014-05-04 | 2016-05-18 | 四川大学 | Water filling extends physical pendulum pendulum length and measures acceleration of gravity |
CN104200723B (en) * | 2014-09-10 | 2016-09-28 | 宁波市鄞州青林医疗器械技术咨询有限公司 | Contact is from seeking formula zero moment of torsion physical pendulum rotating shaft processing technology |
CN104157185B (en) * | 2014-09-10 | 2016-09-07 | 宁波市鄞州青林医疗器械技术咨询有限公司 | Stealthy line contact type physical pendulum manufacture craft |
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2006
- 2006-11-01 CN CNB2006100221601A patent/CN100511327C/en not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
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复摆试验的进一步探讨. 岂云开.承德民族师专学报,第16卷第2期. 1996 |
复摆试验的进一步探讨. 岂云开.承德民族师专学报,第16卷第2期. 1996 * |
Also Published As
Publication number | Publication date |
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CN1945659A (en) | 2007-04-11 |
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C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20091201 |