CN205068932U - Friction displayer - Google Patents
Friction displayer Download PDFInfo
- Publication number
- CN205068932U CN205068932U CN201520713901.5U CN201520713901U CN205068932U CN 205068932 U CN205068932 U CN 205068932U CN 201520713901 U CN201520713901 U CN 201520713901U CN 205068932 U CN205068932 U CN 205068932U
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- China
- Prior art keywords
- friction plate
- briquetting
- friction
- friction force
- dynamometer
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- 238000001179 sorption measurement Methods 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 230000009977 dual effect Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 5
- 241001633942 Dais Species 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses a friction displayer, include: the water flat groove rail that has magnet for adsorb on the blackboard through magnetic force, mobilizable arrangement is in friction plate on the water flat groove rail, place the friction plate top is used for producing the briquetting of frictional force rather than the horizontal relative motion of emergence, the dynamometer that has magnet for adsorb on the blackboard through magnetic force, wherein, the dynamometer perpendicular to water flat groove rail, and through the stay cord with the briquetting is connected, is used for measuring frictional force between briquetting and the friction plate, wherein, the opposite dual roughness of friction plate is different. The utility model discloses make that the student is can be directly perceived clear to know frictional force knowledge, simple structure, convenient operation.
Description
Technical field
The utility model relates to a kind of experimental apparatus, particularly relates to a kind of friction force demonstration instrument for teacher's demonstration.
Background technology
In physics teaching, the teaching of friction force is a difficult point, is usually all that teacher uses dynamometer to pull the static briquetting in horizontal table top on dais in conventional teaching, the student be desirably under dais by this demonstration can understand what the factor affecting stiction and kinetic force of friction be the relation of what and stiction and kinetic force of friction is.But thisly pull traditional demonstration mode of dynamometer to there is following shortcoming by teacher: on the one hand, operation of teacher difficulty, in the process pulling dynamometer, be difficult to the impact getting rid of external force, be difficult to clearly intuitively friction force knowledge be demonstrated to student; On the other hand, traditional demonstrator horizontal pendulum is placed on dais, and student cannot see presentation process clearly, causes student well-knownly cannot understand friction force knowledge.Some schools are had to use motor to replace manually carrying out demonstration friction experiment in prior art, although comparatively conventional teaching instrument energy demonstration friction knowledge preferably, but motor rotation speed is fast, still the influence factor of friction force and relation can not be known and pass to student intuitively.
Summary of the invention
The purpose of this utility model is exactly to overcome above-mentioned prior art Problems existing, provides a kind of friction force demonstration instrument, intuitively can clearly recognize friction force knowledge by this demonstrator student, and structure is simple, easy to operate.
In order to realize above-mentioned purpose of the present utility model, provide following technical scheme:
A kind of friction force demonstration instrument, comprising: the horizontal grooved rail with magnet, for by magnetic-adsorption at blackboard; Mobilizable friction plate be placed on described horizontal grooved rail; Be placed on above described friction plate for producing the briquetting of friction force with its occurred level relative motion; There is the dynamometer of magnet, for by magnetic-adsorption at blackboard; Wherein, described dynamometer perpendicular to described horizontal grooved rail, and is connected with described briquetting by stay cord, for measuring the friction force between described briquetting and friction plate; Wherein, the opposite sides roughness of described friction plate is different.
Preferably, described horizontal grooved rail has open slot, and described friction plate is positioned at described open slot.
Preferably, also comprise: the fixed pulley being fixed on described open slot side, comprising: the holder being fixed on described open slot side, for by magnetic-adsorption at blackboard; Pulley base, its one end and described holder hinged; Fixed pulley, is fixed on the other end of described pulley base; Wherein, described stay cord is walked around its two ends of fixed pulley and is connected dynamometer and briquetting respectively.
Preferably, the two sides that described friction plate has a different roughness is made by the cloth of coated different roughness.
Preferably, described briquetting is arranged the groove for placing counterweight.
The beneficial effects of the utility model embody in the following areas: the utility model is attached on blackboard by magnetic attraction, operation of teacher can be passed through, student observes stiction intuitively and changes the dynamic process of kinetic force of friction and affect the factor of stiction and kinetic force of friction, teaching efficiency is obvious, the effective difficult point helping the study of Students Overcome friction force.
Accompanying drawing explanation
Fig. 1 is the front view of embodiment 1 friction force demonstration instrument;
Fig. 2 is the vertical view (not shown dynamometer) shown in Fig. 1;
Fig. 3 is the side view of the dynamometer shown in Fig. 1;
Fig. 4 is the front view of embodiment 2 friction force demonstration instrument;
Fig. 5 is the vertical view (not shown dynamometer) shown in Fig. 4.
The horizontal grooved rail of description of reference numerals: 1-; 11-open slot; 11a, 11b-elongated slot limit; 2-friction plate; 3-briquetting; 31-groove; 4-stay cord; 5-dynamometer; 51-magnet; 61-holder; 62-pulley base; 63-fixed pulley.
Embodiment
As illustrated in fig. 1 and 2, the utility model provides a kind of friction force demonstration instrument, comprising: the horizontal grooved rail 1 with magnet, for by magnetic-adsorption at blackboard; Mobilizable friction plate 2 be placed on described horizontal grooved rail 1; Be placed on above friction plate 2 for producing the briquetting 3 of friction force with its occurred level relative motion; There is the dynamometer 5 of magnet, for by magnetic-adsorption at blackboard; Wherein, dynamometer 5 perpendicular to horizontal grooved rail 1, and is connected with briquetting 3 by stay cord 4, for measuring the friction force between briquetting 3 and friction plate 2; Be fixed on the fixed pulley of horizontal grooved rail 1 side, have fixed pulley 63, stay cord 4 is walked around its two ends of fixed pulley 63 and is connected dynamometer 51 and briquetting 3 respectively.
As shown in Figure 2, horizontal grooved rail 1 has open slot 11, and open slot 11 has two elongated slot limits 11a, 11b, and the two ends of two elongated slot limits 11a, 11b are the opening of open slot 11.Fixed pulley is fixed therein an open side, and one end of friction plate 2 is positioned at open slot, and the other end can stretch out from another opening part of open slot 11.During experiment, the other end holding friction plate 2 makes friction plate 2 along open slot 11 tangential movement, friction plate 2 owing to being subject to the restriction of both sides two elongated slot limits 11a, 11b and can only doing the rectilinear motion of horizontal direction along open slot 11, thus ensures that this experiment does not affect by all the other external force when tangential movement.
An elongated slot limit 11a of horizontal grooved rail 1 has magnet, as shown in Figure 1, there is the height of the elongated slot limit 11a of magnet higher than another elongated slot limit 11b.
As illustrated in fig. 1 and 2, fixed pulley comprises: holder 61, pulley base 62 and fixed pulley 63.Wherein, holder 61 is fixed on one of them open side of open slot 11; One end and the holder 61 of pulley base 62 are hinged, and the other end fixes fixed pulley 63.
During experiment, by the position of adjustment dynamometer 5 and the angle of pulley base 62 and holder 61, can guarantee that two sections of the stay cord 4 walking around fixed pulley 63 keep vertically and level respectively, make this experiment not affect by all the other external force.
The tow sides roughness of friction plate 2 of the present utility model is different, to observe the friction force size when different roughness.The two sides that friction plate 2 has different roughness is made by the cloth of coated different roughness.During practical operation, respectively as the two sides of friction plate different roughness inside the cloth selecting same material cloth and outside cloth.
As illustrated in fig. 1 and 2, briquetting 3 being arranged the groove 31 for placing counterweight, observing the friction force size when different pressures by the counterweight placing different quality on briquetting.
As illustrated in fig. 1 and 2, the briquetting 3 of embodiment 1 is large with the contact area of friction plate 2; As shown in Figures 3 and 4, the briquetting 3 of embodiment 2 is little with the contact area of friction plate 2; By the friction force size that embodiment 1 and embodiment 2 are observed under different contacts area.
Although above-mentioned, the utility model is elaborated; but the utility model is not limited thereto; those skilled in the art can modify according to principle of the present utility model; therefore, all various amendments carried out according to principle of the present utility model all should be understood to fall into protection domain of the present utility model.
Claims (5)
1. a friction force demonstration instrument, is characterized in that, comprising:
There is the horizontal grooved rail of magnet, for by magnetic-adsorption at blackboard;
Mobilizable friction plate be placed on described horizontal grooved rail;
Be placed on above described friction plate for producing the briquetting of friction force with its occurred level relative motion;
There is the dynamometer of magnet, for by magnetic-adsorption at blackboard;
Wherein, described dynamometer perpendicular to described horizontal grooved rail, and is connected with described briquetting by stay cord, for measuring the friction force between described briquetting and friction plate;
Wherein, the opposite sides roughness of described friction plate is different.
2. friction force demonstration instrument according to claim 1, is characterized in that, described horizontal grooved rail has open slot, and described friction plate is positioned at described open slot.
3. friction force demonstration instrument according to claim 2, is characterized in that, also comprises: the fixed pulley being fixed on described open slot side, comprising:
Be fixed on the holder of described open slot side;
Pulley base, its one end and described holder hinged;
Fixed pulley, is fixed on the other end of described pulley base; Wherein,
Described stay cord is walked around its two ends of fixed pulley and is connected dynamometer and briquetting respectively.
4. friction force demonstration instrument according to claim 3, is characterized in that, the two sides that described friction plate has different roughness is made by the cloth of coated different roughness.
5. friction force demonstration instrument according to claim 4, is characterized in that, described briquetting is arranged the groove for placing counterweight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520713901.5U CN205068932U (en) | 2015-09-15 | 2015-09-15 | Friction displayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520713901.5U CN205068932U (en) | 2015-09-15 | 2015-09-15 | Friction displayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205068932U true CN205068932U (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520713901.5U Active CN205068932U (en) | 2015-09-15 | 2015-09-15 | Friction displayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205068932U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110533997A (en) * | 2019-09-11 | 2019-12-03 | 罗森聪 | Integrated demonstration experimental device for the experiment of physical friction power |
-
2015
- 2015-09-15 CN CN201520713901.5U patent/CN205068932U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110533997A (en) * | 2019-09-11 | 2019-12-03 | 罗森聪 | Integrated demonstration experimental device for the experiment of physical friction power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170612 Address after: 101399, No. 2 Airport East Road, airport economic core area, Beijing, Shunyi District Patentee after: Beijing Shi Zhong FA FA Technology Co., Ltd. Address before: 101300, Shunyi District, Beijing Xin Yi home building 28, 3 door, room 1702 Patentee before: Dong Zhanjiang |
|
| TR01 | Transfer of patent right |