CN202996134U - Novel simple pendulum demonstration instrument - Google Patents
Novel simple pendulum demonstration instrument Download PDFInfo
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- CN202996134U CN202996134U CN 201220710924 CN201220710924U CN202996134U CN 202996134 U CN202996134 U CN 202996134U CN 201220710924 CN201220710924 CN 201220710924 CN 201220710924 U CN201220710924 U CN 201220710924U CN 202996134 U CN202996134 U CN 202996134U
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- cantilever
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- steel ball
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- bolt
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Abstract
Disclosed in the utility model is a novel simple pendulum demonstration instrument that comprises an iron stand, a support rod, a moving rack, a cantilever. The lower end of the support rod is fixed on the iron stand; the moving rack is fixed at the upper end of the support rod; and the cantilever is installed on the moving rack. A first small steel ball, a second small steel ball, a large steel ball, a first large plastic ball, and a second plastic ball are hung at the lower side of the cantilever; and the size and the weight of the first small steel ball are respectively identical with the size and the weight of the second small steel ball and the size and the weight of the first large plastic ball are respectively identical with the size and the weight of the second large plastic ball. Swinging strings are tied to all the balls; the upper ends of the swinging strings are fixedly connected with rotating plates arranged at the upper sides of the cantilever; bolts are inserted at the rotating plates, wherein springs are sleeved on the bolts; and the lower ends of the bolts are cooperated with nuts arranged at the lower side of the cantilever. According to the utility model, with utilization of the structure, the simple pendulum demonstration instrument can be used conveniently; the demonstration result is visual and obvious; the functions of the instrument are complete; and the lengths of the swinging strings can be adjusted conveniently and rapidly. Moreover, the provided simple pendulum demonstration instrument has characteristics of ingenious design, simple structure, easy transform and low transform cost and the like.
Description
Technical field
The utility model belongs to the realia field, specifically, and particularly a kind of novel single pendulum demonstrator.
Background technology
At present, most of teaching means also rest on the stage of word picture, picture presentation, do not have corresponding teaching aid and impart knowledge to students intuitively during formula the natural period of senior middle school physics teaching single pendulum.Cause the student can only merely carry on the back formula, the cycle that can not understand intuitively single pendulum is only relevant with pendulum length, and all irrelevant with amplitude, swing ball quality and swing ball diameter.Also have and use traditional single pendulum demonstrator to carry out teaching demonstration, but only have a cycloid and a swing ball on this single pendulum demonstrator, during demonstration, must repeatedly dismantle cycloid and change swing ball, not only use inconveniently, and experiment effect is obviously directly perceived.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of single pendulum demonstrator easy to use.
the technical solution of the utility model is as follows: a kind of novel single pendulum demonstrator, comprise iron stand (1), pole (2), movable stand (3) and cantilever (4), wherein the lower end of pole (2) is fixed on iron stand (1), be fixed with movable stand (3) in the upper end of pole (2), cantilever (4) is housed on described movable stand (3), described cantilever (4) is horizontally disposed, it is characterized in that: the downside at described cantilever (4) hangs with the first small ball (5) along its length, the second small ball (6), big steel ball (7), first ball (8) and the second largest ball (9) of moulding moulded, wherein the first small ball (5) is identical with size and the weight of the second small ball (6), the first ball (8) of moulding is identical with second largest size and weight of moulding ball (9), on all spheroids separately bolt cycloid (10) is arranged, the upper end of described five cycloids (10) is passed cantilever (4) and is fixedly linked with five rotating disks (11) of cantilever (4) upside respectively, be inserted with bolt (12) on rotating disk (11), on the double-screw bolt of described bolt (12), cover has spring (13), this spring (13) is positioned at the top of rotating disk (11), the lower end of described bolt (12) passes rotating disk (11) and cantilever (4) is connected with the nut (14) of cantilever (4) downside.
Adopt said structure, hang with all equal identical balls of moulding greatly of identical small ball, big steel ball and two big or small quality of two big or small quality on cantilever, and the cycloid of these spheroids all is fastened on rotating disk, and rotating disk is fixed on cantilever top by spring, screw bolt and nut, and the length of cycloid can conveniently be adjusted; When presentation cycle and amplitude are irrelevant, two small balls or two cycloid adjustment of moulding greatly ball are consistent, discharge from differing heights and get final product; When presentation cycle and quality are irrelevant, mould greatly ball with one consistent with the cycloid adjustment of a big steel ball, get final product from sustained height release; When presentation cycle and swing ball diameter are irrelevant, the cycloid adjustment of a small ball and a big steel ball is consistent, discharge from sustained height and get final product; When presentation cycle is relevant with pendulum length, two small balls or two pendulum lengths of moulding greatly ball are adjusted to different length, discharge from sustained height and get final product, thus make the single pendulum demonstrator use convenient, the demonstration result is more directly perceived, obvious; And, the pendulum length of any one spheroid is adjusted to 1 meter long, and spheroid is measured the spheroid pendulum period after pulling open the angle release less than 5 degree from the equilibrium position, can utilize Period Formula to calculate the approximate value of acceleration of gravity, make the function of single pendulum demonstrator more complete.
Be fixed with stopwatch (15) on described iron stand (1), can read more easily the single pendulum pendulum period.
Be placed with ruler (16) on described iron stand (1), described ruler (16) and pole (2) are mutually vertical with cycloid (10) plane, place, and described ruler can be used for controlling intuitively the angle that spheroid pulls open, and guarantee that spheroid does simple harmonic motion, and, can be used for measuring the length of cycloid.
Beneficial effect: the utility model is by hanging two identical small balls, big steel ball and two identical balls of moulding greatly on cantilever, and the cycloid of these spheroids is fastened respectively on rotating disk, thereby make the single pendulum demonstrator use convenient, the demonstration result is more directly perceived, obviously, have be skillfully constructed, simple in structure, transformation easily and the characteristics such as improvement cost is low.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, the utility model comprises iron stand 1, pole 2, movable stand 3, cantilever 4, the first small ball 5, the second small ball 6, big steel ball 7, first ball 8, second largest ball 9, cycloid 10, rotating disk 11, bolt 12, spring 13, nut 14, stopwatch 15 and the ruler 16 moulded moulded.Wherein the lower end of pole 2 is fixed on iron stand 1, is mounted with movable stand 3 in the upper end of support 2, and is horizontally disposed at described movable stand 3, on this movable stand 3, cantilever 4 is housed, described cantilever 4 is horizontally disposed, and these are all same as the prior art, and therefore not to repeat here.Downside at described cantilever 4 hangs with the first small ball 5, the second small ball 6, big steel ball 7, first ball 8 and the second largest ball 9 of moulding moulded along its length successively.The size of the first small ball 5 and the second small ball 6 and identical in quality wherein, first ball 8 and the second largest size of moulding ball 9 and identical in quality of moulding.And, described the first small ball 5, the second small ball 6, big steel ball 7, firstly to mould ball 8 and second largestly mould on ball 9 respectively that bolt has cycloid 10, the upper end of described five cycloids 10 is passed corresponding via hole on cantilever 4 separately and the rotating disk 11 of cantilever 4 upsides is fixedly linked.Be inserted with bolt 12 on rotating disk 11 from top to bottom, on the double-screw bolt of described bolt 12, cover has volute spring 13, and this spring 13 is positioned at the top of rotating disk 11.The lower end of described bolt 12 passes rotating disk 11 and cantilever 4 is connected with the nut 14 of cantilever 4 downsides, is fixed on cantilever 4 thereby spring 13 is pushed against rotating disk 11.
As shown in Figure 1, be fixed with stopwatch 15 on described iron stand 1.Be placed with ruler 16 on described iron stand 1, described ruler 16 and pole 2 are mutually vertical with cycloid 10 planes, place.
Claims (3)
1. novel single pendulum demonstrator, comprise iron stand (1), pole (2), movable stand (3) and cantilever (4), wherein the lower end of pole (2) is fixed on iron stand (1), be fixed with movable stand (3) in the upper end of pole (2), cantilever (4) is housed on described movable stand (3), described cantilever (4) is horizontally disposed, it is characterized in that: the downside at described cantilever (4) hangs with the first small ball (5) along its length, the second small ball (6), big steel ball (7), first ball (8) and the second largest ball (9) of moulding moulded, wherein the first small ball (5) is identical with size and the weight of the second small ball (6), the first ball (8) of moulding is identical with second largest size and weight of moulding ball (9), on all spheroids separately bolt cycloid (10) is arranged, the upper end of described five cycloids (10) is passed cantilever (4) and is fixedly linked with five rotating disks (11) of cantilever (4) upside respectively, be inserted with bolt (12) on rotating disk (11), on the double-screw bolt of described bolt (12), cover has spring (13), this spring (13) is positioned at the top of rotating disk (11), the lower end of described bolt (12) passes rotating disk (11) and cantilever (4) is connected with the nut (14) of cantilever (4) downside.
2. novel single pendulum demonstrator according to claim 1, is characterized in that: be fixed with stopwatch (15) on described iron stand (1).
3. novel single pendulum demonstrator according to claim 1 and 2 is characterized in that: be placed with ruler (16) on described iron stand (1), described ruler (16) and pole (2) are mutually vertical with cycloid (10) plane, place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710924 CN202996134U (en) | 2012-12-21 | 2012-12-21 | Novel simple pendulum demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710924 CN202996134U (en) | 2012-12-21 | 2012-12-21 | Novel simple pendulum demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202996134U true CN202996134U (en) | 2013-06-12 |
Family
ID=48567281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220710924 Expired - Fee Related CN202996134U (en) | 2012-12-21 | 2012-12-21 | Novel simple pendulum demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202996134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383825A (en) * | 2013-06-29 | 2013-11-06 | 北京工业大学 | Spring S-shaped pendulum demonstration instrument |
| CN103400521A (en) * | 2013-06-29 | 2013-11-20 | 北京工业大学 | Variable pendulum ball-spring snakelike pendulum |
-
2012
- 2012-12-21 CN CN 201220710924 patent/CN202996134U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383825A (en) * | 2013-06-29 | 2013-11-06 | 北京工业大学 | Spring S-shaped pendulum demonstration instrument |
| CN103400521A (en) * | 2013-06-29 | 2013-11-20 | 北京工业大学 | Variable pendulum ball-spring snakelike pendulum |
| CN103400521B (en) * | 2013-06-29 | 2015-11-18 | 北京工业大学 | Become the snakelike pendulum of swing ball spring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20131221 |