CN104157185B - Stealthy line contact type physical pendulum manufacture craft - Google Patents
Stealthy line contact type physical pendulum manufacture craft Download PDFInfo
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- CN104157185B CN104157185B CN201410458529.8A CN201410458529A CN104157185B CN 104157185 B CN104157185 B CN 104157185B CN 201410458529 A CN201410458529 A CN 201410458529A CN 104157185 B CN104157185 B CN 104157185B
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- Prior art keywords
- flat board
- breach
- fork
- hole
- blind hole
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- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 238000007514 turning Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention relates to a kind of twistless compound pendulum, particularly to a kind of stealthy line contact type physical pendulum manufacture craft.The technical scheme is that and one flat plate is set on the top of physical pendulum bracket upright post, the length and width of flat board, thick respectively 18cm, 8cm and 0.5cm, flat board is enclosed within bracket upright post by the through hole on plate and is fixed with nut, make plate face and the uprights vertical of flat board, the distance of the dual-side of the center in the hole matched with column on flat board and the termination of one end of flat board and flat board is all 4cm, at anomaly plate other end 2.5cm, picture one is parallel to the horizontal line of this end face, line centered by this horizontal line again, opens the breach of wide one 1.5cm on flat board.
Description
Technical field
The present invention relates to a kind of twistless compound pendulum, particularly to a kind of stealthy line contact type physical pendulum manufacture craft.
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 meter of cell structure, the degree of accuracy of this level meter then places one's entire reliance upon the accurate installation of level meter, yet with this structure
The self-defect of level meter, 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 degree of 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 measure error.The applicant 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 stealthy line contact type physical pendulum manufacture craft.
The object of the present invention is achieved like this: arranges one flat plate on the top of physical pendulum bracket upright post, the length and width of flat board, thickness
Being respectively 18cm, 8cm and 0.5cm, flat board is enclosed within bracket upright post by the through hole on plate and is fixed with nut, making flat board
Plate face and uprights vertical, the termination of the center in the hole that flat board matches with column and one end of flat board and the dual-side of flat board
Distance is all 4cm, and at anomaly plate other end 2.5cm, picture one is parallel to the horizontal line of this end face, then line centered by this horizontal line,
Opening the breach of wide one 1.5cm on flat board, the bottom surface of this breach is 1cm with the distance of another complete side of flat board, the most again
Making, a thickness 1cm identical with flat board notch geometry, the width of breach tripartite is the breach annex of 1cm, at breach annex
On respectively open the tapped through hole of a M4 in breach two sides central point, take the screw of the M4 of two root lengths 2.5cm, by screw front end
Its diameter is reduced to 2mm by the way of turning or grinding by the length thereof of 5mm, then this section is processed into cone, then by aforementioned
Screw containing cone on breach annex outside two screw screw in, make two cones most advanced and sophisticated at a distance of 6mm～7mm, then will lack with rivet
Mouth annex riveted is on flat board, and makes the breach of breach annex align with the breach on flat board, the length and width of physical pendulum fork, thickness point
Not Wei 60cm, 2cm, 0.5cm, the hole on fork be blind hole and be in the wide face of fork two longitudinal centre line on, the hole of blind hole
Spacing is 2cm, and blind hole is bellmouth, and its degree of depth is 1.5mm, mouth diameters is 1mm, the blind hole that width face, fork both sides is corresponding
Top align respectively, after fork is inserted in aforementioned breach, allow the cone of tapered blind hole alignment notch annex both sides, then turn
Side cone screw rod, until two cones all enter into tapered blind hole.
Use such scheme can receive following remarkable result:
1. when two cones on breach annex withstand in the tapered blind hole on fork two sides respectively, on the surface, fork and two cones
Point contact be two point form contact, but substantially receive wire type contact effect, although this line is invisible, but substantially this
Bar line is exactly the stealthy line between two tapered blind hole summits.Owing to being stable linear contact lay, this just gives the antitorque dynamic energy of physical pendulum
Power, even if there being deflection when fork is pulled away from equilbrium position by student, but after release fork, fork can realize automatic deviation correction in 5 seconds.
On the other hand, owing to the contact of fork and two cones is only 2 points, so the damping torque between fork and cone can be made to reach
Little, it is thus possible to guarantee number hunting period that fork is necessary.
2. changed into table shallow point-like blind hole due to fork hole by known through hole, thus both reduced the machining amount of fork, heavier
Want is the quality having increased considerably fork unit length, thus adds the periodicity that fork freely swings, and this is for improving week
The degree of accuracy that phase measures is laid a good foundation.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
On the top of physical pendulum bracket upright post, one flat plate is set, the length and width of flat board, thick 18cm, 8cm and 0.5cm of being respectively are flat
Plate is enclosed within bracket upright post by the through hole on plate and is fixed with nut, makes plate face and the uprights vertical of flat board, on flat board with
The distance of the dual-side of the center in the hole that column matches and the termination of one end of flat board and flat board is all 4cm, at the anomaly plate other end
At the 2.5cm of face, picture one is parallel to the horizontal line of this end face, then line centered by this horizontal line, opens the breach of wide one 1.5cm on flat board,
The distance of the bottom surface of this breach and another complete side of flat board is 1cm, make the most again one identical with flat board notch geometry, thick
Degree 1cm, the width of breach tripartite is the breach annex of 1cm, respectively opens one in breach two sides central point on breach annex
The tapped through hole of individual M4, takes the screw of the M4 of two root lengths 2.5cm, by the length thereof of screw front end 5mm by turning or grinding
Its diameter is reduced to 2mm by mode, then this section is processed into cone, then by the aforementioned screw containing cone on breach annex outside two
Screw screws in, and makes two cones most advanced and sophisticated at a distance of 6mm～7mm, then with rivet by breach annex riveted on flat board, and make breach attached
The breach of part aligns with the breach on flat board, and the length and width of physical pendulum fork, thick respectively 60cm, 2cm, 0.5cm, on fork
Hole be blind hole and be in the wide face of fork two longitudinal centre line on, the pitch of holes of blind hole is 2cm, and blind hole is bellmouth, and it is deep
Degree is 1mm for 1.5mm, mouth diameters, and the top of the blind hole that width face, fork both sides is corresponding aligns respectively, when fork is inserted aforementioned
After in breach, allow the cone of tapered blind hole alignment notch annex both sides, then turn side cone screw rod, until two cones all enter
To tapered blind hole.
Claims (1)
1. a stealthy line contact type physical pendulum preparation method, is characterized in that: arrange one flat plate on the top of physical pendulum bracket upright post,
The length and width of flat board, thick respectively 18cm, 8cm and 0.5cm, flat board is enclosed within bracket upright post by the through hole on plate and uses nut
Fixed, made the termination of plate face and the uprights vertical of flat board, the center in the hole that flat board matches with column and one end of flat board
Being all 4cm with the distance of the dual-side of flat board, at anomaly plate other end 2.5cm, picture one is parallel to the horizontal line of this end face, then with
Line centered by this horizontal line, opens the breach of wide one 1.5cm on flat board, the bottom surface of this breach and another complete side of flat board away from
From for 1cm, making, a thickness 1cm identical with flat board notch geometry the most again, the breach that the width of breach tripartite is 1cm is attached
Part, respectively opens the tapped through hole of a M4 on breach annex, takes the spiral shell of the M4 of two root lengths 2.5cm in breach two sides central point
Nail, is reduced to its diameter the length thereof of screw front end 5mm 2mm by the way of turning or grinding, then this section is processed into cone
Point, then by the aforementioned screw containing cone on breach annex outside two screw screw in, make two cones most advanced and sophisticated at a distance of 6mm～7mm,
Then with rivet by breach annex riveted on flat board, and make the breach of breach annex align with the breach on flat board, physical pendulum fork
Length and width, thick be respectively 60cm, 2cm, 0.5cm, the hole on fork is blind hole and is in the longitudinal center in the wide face of fork two
On line, the pitch of holes of blind hole is 2cm, and blind hole is bellmouth, and its degree of depth is 1.5mm, mouth diameters is 1mm, fork both sides width
The top of the blind hole that face is corresponding aligns respectively, after fork is inserted in aforementioned breach, allows tapered blind hole alignment notch annex both sides
Cone, then turn side cone screw rod, until two cones all enter into tapered blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458529.8A CN104157185B (en) | 2014-09-10 | 2014-09-10 | Stealthy line contact type physical pendulum manufacture craft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458529.8A CN104157185B (en) | 2014-09-10 | 2014-09-10 | Stealthy line contact type physical pendulum manufacture craft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104157185A CN104157185A (en) | 2014-11-19 |
| CN104157185B true CN104157185B (en) | 2016-09-07 |
Family
ID=51882671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410458529.8A Active CN104157185B (en) | 2014-09-10 | 2014-09-10 | Stealthy line contact type physical pendulum manufacture craft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104157185B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945659A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Combined twistless compound pendulum |
| CN202003548U (en) * | 2010-12-31 | 2011-10-05 | 德州学院 | Compound pendulum instrument |
| CN102723023A (en) * | 2012-06-04 | 2012-10-10 | 四川大学 | Clamped type compound pendulum with graduated scale |
-
2014
- 2014-09-10 CN CN201410458529.8A patent/CN104157185B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945659A (en) * | 2006-11-01 | 2007-04-11 | 四川大学 | Combined twistless compound pendulum |
| CN202003548U (en) * | 2010-12-31 | 2011-10-05 | 德州学院 | Compound pendulum instrument |
| CN102723023A (en) * | 2012-06-04 | 2012-10-10 | 四川大学 | Clamped type compound pendulum with graduated scale |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104157185A (en) | 2014-11-19 |
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Effective date of registration: 20170620 Address after: 226500 Jiangsu city of Rugao Province under the original Peach Town Road No. 98 7 floor Patentee after: RUGAO XIAYUAN SCIENCE & TECHNOLOGY ESTABLISH A BUSINESS 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 EQUIPMENT TECHNOLOGY CONSULTING Co.,Ltd. |
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Effective date of registration: 20240820 Address after: No. 31 Xingyuan Road, Xiayuan Town, Rugao City, Nantong City, Jiangsu Province, China 226500 Patentee after: Jiangsu Hongjing Group Co.,Ltd. Country or region after: China Address before: 226500 7th floor, 98 Taoli Road, Xiayuan Town, Rugao City, Jiangsu Province Patentee before: RUGAO XIAYUAN SCIENCE & TECHNOLOGY ESTABLISH A BUSINESS SERVICES Co.,Ltd. Country or region before: China |
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