CN202008764U - Mechanical demonstration teaching tool - Google Patents
Mechanical demonstration teaching tool Download PDFInfo
- Publication number
- CN202008764U CN202008764U CN2011200042773U CN201120004277U CN202008764U CN 202008764 U CN202008764 U CN 202008764U CN 2011200042773 U CN2011200042773 U CN 2011200042773U CN 201120004277 U CN201120004277 U CN 201120004277U CN 202008764 U CN202008764 U CN 202008764U
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- CN
- China
- Prior art keywords
- cross beam
- fixed cross
- slide block
- rocking lever
- demonstration teaching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a mechanical demonstration teaching tool, comprising a base, a vertical rod, a swinging lever, a fixed cross beam, sliding blocks, gauge blocks and the like, wherein the base is a cuboid made of cast iron; the lower end of the vertical column is vertically fixed at the center of the base; dimension lines are engraved on the swinging lever which is hinged at the upper part of the vertical column and can swing relative to the vertical column; the fixed cross beam is firmly inserted at the central part of the vertical column; the two ends of the swinging lever and the fixed cross beam are respectively provided with a sliding block in a sliding manner; the lower parts of the sliding blocks at the two ends of the swinging lever are respectively provided with an angle ruler; the gauge blocks are hung on lifting lugs of the sliding blocks at the two ends of the swinging lever; and the central parts of lifting ropes pass through the lifting lugs on the sliding blocks at the two ends of the fixed cross beam and then droop freely. The mechanical demonstration teaching tool has the beneficial effects of being three-dimensional and intuitive, being clear at a glance, being capable of changing moment arms and an effect by changing the sizes of the gauge blocks and the positions of the sliding blocks, and being beneficial to building a mechanical model in the brains of students.
Description
Technical field
The utility model belongs to a kind of teaching aid, is applicable to the junior physics classroom instruction, and it helps middle school student's intelligence development, is a kind of mechanics demonstration teaching aid concretely.
Background technology
In the junior physics course, mechanics part is than being easier to carry out object teaching, but China's teaching aid in this respect also lacks very much at present, and for example when talking about the synthetic of lever principle and power and decomposing, teacher will lean on the picture sheet to explain.Particularly when the parts such as relation of the length of talking about the size and Orientation of power, the arm of force, resolution of force and the arm of force, if a teaching aid intuitively can be arranged, that will can be very helpful to classmates' understanding.
Summary of the invention
In order to overcome the deficiency of mechanics teaching aid in existing junior middle school's mechanics study course, this use is novel to provide a kind of mechanics demonstration teaching aid, it helps to cultivate and excite the enthusiasm of classmates' learning physics class, can allow classmates see intuitively the size of length, the power of direction when power, the arm of force change after the change of its action effect, this mechanics demonstration teaching aid can make the pictorial teaching on plane become three-dimensional, intuitively, teaching in kind, this is very useful to manipulative ability and the creativity that will improve classmates from now on.
To achieve these goals, the technical solution adopted in the utility model is: a kind of mechanics demonstration teaching aid, it comprises base, column, rocking lever, fixed cross beam, slide block, gauge block etc.Wherein base is a castiron rectangular parallelepiped, the lower end of column is vertical is fixed on base central authorities, be carved with dimension line on the rocking lever, rocking lever is hinged in the rectangular channel of column upper opening, can swing with respect to column, fixed cross beam is by in the firm rectangular opening that is inserted into the column middle part, the two ends of rocking lever and fixed cross beam each slide a slide block is housed, the upper end of slide block is equipped with one and is held out against screw for a short time and be used for fixing slide block, the positive middle part of slide block is shaped on a hanger, a bevel protractor respectively is equipped with in the bottom of rocking lever two ends slide block, the center that is centered close to hanger on the slide block of bevel protractor, gauge block hangs over through lifting rope on the hanger of rocking lever two ends slide block, and the middle part of lifting rope is free sagging behind the hanger on the two ends slide block on the fixed cross beam.
The beneficial effects of the utility model are: three-dimensional directly perceived, come into plain view, and by the size of change gauge block and the position of slide block, can change the arm of force and action effect, help in classmates' brain, setting up a mechanical model.
Using method of the present utility model is: the slide block at rocking lever two ends is fixed on the optional position, and hang up the gauge block of Different Weight, by regulating the position of fixed cross beam two ends slide block, make rocking lever two ends, two ends balance, at this moment read the action direction of power on size on the rocking lever and the bevel protractor, can calculate the two ends arm of force and equate with the product of power.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Fig. 2 is the A-A cut-open view among Fig. 1;
Fig. 3 is the B-B cut-open view among Fig. 1;
Among the figure, 1. base, 2. column, 3. fixed cross beam 4. holds out against screw greatly, 5. rocking lever, 6. straight pin, 7. slide block, the 8. for a short time screw that holds out against, 9. bevel protractor, 10. hanger, 11. gauge blocks, 12. lifting ropes, 13. button-headed screws.
Embodiment
Below in conjunction with accompanying drawing structure of the present utility model is further detailed: in the drawings, a kind of mechanics demonstration teaching aid, it comprises base 1, column 2, rocking lever 5, fixed cross beam 3, slide block 7, gauge block 11 etc.Wherein base 1 is a castiron rectangular parallelepiped, the central authorities that are fixed on base 1 that the lower end of column 2 is vertical, dimension line is carved with at rocking lever 5 two ends, the middle part of rocking lever 5 is in straight pin 6 is hinged on the rectangular channel of column 2 upper openings, and can be with respect to column 2 swings, fixed cross beam 3 through hold out against greatly screw 4 by the firm rectangular opening that is inserted into column 2 middle parts in, the two ends of rocking lever 5 and fixed cross beam 3 each slide a slide block 7 is housed, the upper end of slide block 7 is equipped with one and is held out against screw 8 for a short time and be used for fixing slide block 7, the positive middle part of slide block 7 is shaped on a hanger 10, a bevel protractor 9 respectively is equipped with through button-headed screw 13 in the bottom of rocking lever 5 two ends slide blocks 7, the center that is centered close to hanger 10 on the slide block 7 of bevel protractor 9, gauge block 11 hangs over through lifting rope 12 on the hanger 10 of rocking lever 5 two ends slide blocks 7, and the middle part of lifting rope 12 is free sagging behind the hanger on the two ends slide block 7 on the fixed cross beam 3 10.
Claims (3)
1. mechanics demonstration teaching aid, it is characterized in that: it comprises base, column, rocking lever, fixed cross beam, slide block, gauge block, the lower end of its central post is vertical is fixed on base central authorities, rocking lever is hinged on column top, fixed cross beam is by in the firm rectangular opening that is inserted into the column middle part, the two ends of rocking lever and fixed cross beam each slide a slide block is housed, the upper end of slide block is equipped with one and is held out against screw for a short time, the positive middle part of slide block is shaped on a hanger, a bevel protractor respectively is equipped with in the bottom of rocking lever two ends slide block, gauge block hangs over through lifting rope on the hanger that slides at the rocking lever two ends, and the middle part of lifting rope is free sagging behind the hanger on the two ends slide block on the fixed cross beam.
2. a kind of mechanics demonstration teaching aid according to claim 1 is characterized in that: the upward center of hanger of slip that is centered close to of bevel protractor.
3. a kind of mechanics demonstration teaching aid according to claim 1 is characterized in that: be carved with dimension line on the rocking lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200042773U CN202008764U (en) | 2011-01-10 | 2011-01-10 | Mechanical demonstration teaching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200042773U CN202008764U (en) | 2011-01-10 | 2011-01-10 | Mechanical demonstration teaching tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202008764U true CN202008764U (en) | 2011-10-12 |
Family
ID=44750424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200042773U Expired - Fee Related CN202008764U (en) | 2011-01-10 | 2011-01-10 | Mechanical demonstration teaching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202008764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269088A (en) * | 2014-10-25 | 2015-01-07 | 安徽工程大学 | Mechanical experimental device and method for conducting experiment by applying same |
-
2011
- 2011-01-10 CN CN2011200042773U patent/CN202008764U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269088A (en) * | 2014-10-25 | 2015-01-07 | 安徽工程大学 | Mechanical experimental device and method for conducting experiment by applying same |
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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: 20111012 Termination date: 20120110 |