CN2938267Y - Friction demonstration instrument - Google Patents
Friction demonstration instrument Download PDFInfo
- Publication number
- CN2938267Y CN2938267Y CN 200620005260 CN200620005260U CN2938267Y CN 2938267 Y CN2938267 Y CN 2938267Y CN 200620005260 CN200620005260 CN 200620005260 CN 200620005260 U CN200620005260 U CN 200620005260U CN 2938267 Y CN2938267 Y CN 2938267Y
- Authority
- CN
- China
- Prior art keywords
- friction
- spring
- slide plate
- base
- plate dolly
- 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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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a friction demonstration instrument which pertains to the experimental teaching demonstrating equipment field, which comprises a base. The spring brackets are connected with two ends of the base; a spring is respectively provided on the spring brackets. The other end of the spring is respectively connected with two ends of a slipper block dolly which is provided with an upper cover that is an aclinic surface; a rack is fixed in the slipper block dolly; a gear which meshes with the rack is provided at the position corresponding with the rack in the slipper block dolly. A guide finger is fixed on a gear axle which is covered on a beam of a gear bracket; the gear bracket is fixed on the base. A dial is provided on the base and is corresponded with the guide finger. The utility model has the advantages of simple structure, simple process and manufacture, convenient use and good using effect; the utility model can show the direction of the friction through the guide finger while measuring the friction; the utility model also can measure the relation among a maximum static friction force, a demonstration friction and a normal pressure and a relation between the demonstration friction and the friction material of the interface.
Description
Technical field
The utility model relates to a kind of experimental provision of demonstration friction, the friction force demonstration instrument of size and Orientation that especially can demonstration friction.
Background technology
At present, just, the experimental provision of demonstration friction is to draw wooden unit to survey the size of friction force with spring balance on the high school physics textbook, but can not demonstrate out the direction of friction force on long plank, learn friction force knowledge to the student and cause certain difficulty.
Summary of the invention
The utility model is at the existing in prior technology shortcoming, and provide a kind of simple in structure, processing and manufacturing is simple and easy, easy to use, effect is good, use the utility model in the size of surveying friction force, can indicate the technical scheme of the friction force demonstration instrument of friction force direction, use the also relation of relation, demonstration friction and the surface of contact friction material of energy measurement maximum static friction force, demonstration friction and normal pressure of the utility model by pointer.
The utility model is realized by following technical measures: it comprises base, the two ends of base are connected with spring suppport, on spring suppport, be respectively arranged with a spring, the other end of spring is connected with the two ends of slide plate dolly respectively, the slide plate dolly has loam cake, loam cake is the face of level, on cover and be placed with wooden unit, slide plate dolly internal fixation has tooth bar, is provided with and the tooth bar meshed gears with the tooth bar correspondence position in the slide plate dolly, is fixed with pointer on the gear shaft, gear bush is contained on the crossbeam of gear stand, gear stand is fixed on the base, and base is provided with index dial, and index dial is corresponding with pointer position.
Reading makes that the scale of pointer indication is exactly the numerical value and the direction of friction force for convenience, and the utility model can also be designed to zero-bit with the middle part of scale, and both sides are respectively arranged with scale value.When the tensile elongation that specifically can be by regulating spring and the position of dolly realize that dolly is in the balance stationary state, pointer be designated as zero.
For the ease of installing and fixing and safeguard gear and tooth bar and gear shaft, further improvement of the utility model also has, and the arranged outside of slide plate dolly has window, and position of window is corresponding with the position of pitch wheel, tooth bar.
For convenience of fixing spring, further improvement of the utility model also has, and the two ends of slide plate dolly are provided with aluminium flake, and described spring is connected with aluminium flake.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the mounting structure synoptic diagram of Fig. 1 middle slide plate dolly middle gear, tooth bar, pointer and frame.
Among the figure, 1, spring suppport, 2, spring, 3, wooden unit, 4, gear stand, 5, the slide plate dolly, 6, tooth bar, 7, pointer, 8, gear, 9, aluminium flake, 10, crossbeam, 11, index dial, 12, base.
Embodiment
For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by an embodiment.
The utility model is a kind of friction force demonstration instrument, it comprises base 12, the two ends of base 12 are connected with spring suppport 1, be respectively arranged with a spring 2 on spring suppport 1, the other end of spring 2 is connected with the two ends of slide plate dolly 5 respectively, and slide plate dolly 5 has loam cake, loam cake is the face of level, on cover and be placed with wooden unit, wooden unit can adopt other weight to substitute, this belongs to common practise.Specifically can adopt veneer to make, slide plate dolly 5 internal fixation have tooth bar 6, in slide plate dolly 5, be provided with and tooth bar 6 meshed gears 8 with tooth bar 6 correspondence positions, with be fixed with pointer 7 on the gear shaft that gear 8 is fixedlyed connected, gear bush is contained on the crossbeam 10 of gear stand 4, gear stand 4 is fixed on the base 12, be installed with index dial 11 on the base 12, index dial 11 is corresponding with pointer 7 positions, and the middle part of index dial 11 is a zero-bit, and both sides are respectively arranged with scale value.The arranged outside of slide plate dolly 5 has window, and position of window is corresponding with the position of pitch wheel 8, tooth bar 6.The two ends of slide plate dolly 5 are provided with aluminium flake 9, and described spring 2 is connected with aluminium flake 9, and described spring 2 can also be connected with slide plate dolly 5 by other known technology, as welding, screw retention or the like known approaches.
Concrete operations step of the present utility model (using method) is as follows:
1, first testing fixture is regulated two springs and is made it be in extended state, and makes the slide plate dolly be in the static equilibrium state, makes wheel and rack engagement intact, goes slick, and makes the friction factor of base as far as possible little, levels off to smooth flat.
2, zeroing, when making the slide plate dolly be in the static equilibrium state, the zero-bit in the middle of the pointed index dial draws the slide plate dolly to mark scale on index dial with spring balance.
3, on the slide plate dolly, put a wooden unit, (or left side) is when pushing away (drawing) wooden unit when lentamente at the uniform velocity to the right, the wooden unit lower surface exists relative slip or relative tendency toward sliding with slide plate dolly upper surface, the slide plate dolly drives tooth bar to the direction motion identical with pulling force, turn an angle with the tooth bar that moves with the tooth bar meshed gears, reach after the new balance promptly stable after, the pointer on the gear shaft just indicates the size and Orientation of the force of sliding friction (or maximum static friction force) of wooden unit lower surface and slide plate dolly surface of contact.
In addition, the weight that the utility model also can be by increasing wooden unit or on wooden unit, add counterweight, to the right or Zola's wooden unit, but the relation of contrast demonstration friction and normal pressure thus.
In addition, on dolly, cover and fix a cotton, draw wooden unit to the right, but the relation of demonstration friction and different surface of contact materials.
Claims (3)
1, a kind of friction force demonstration instrument, it is characterized in that, it comprises base, the two ends of base are connected with spring suppport, on spring suppport, be respectively arranged with a spring, the other end of spring is connected with the two ends of slide plate dolly respectively, and the slide plate dolly has loam cake, and loam cake is the face of level, on cover and be placed with wooden unit, slide plate dolly internal fixation has tooth bar, is provided with and the tooth bar meshed gears with the tooth bar correspondence position in the slide plate dolly, is fixed with pointer on the gear shaft, gear bush is contained on the crossbeam of gear stand, gear stand is fixed on the base, and base is provided with index dial, and index dial is corresponding with pointer position.
2, friction force demonstration instrument according to claim 1 is characterized in that, the arranged outside of described slide plate dolly has window, and position of window is corresponding with the position of pitch wheel, tooth bar.
3, friction force demonstration instrument according to claim 1 and 2 is characterized in that, the two ends of described slide plate dolly are provided with aluminium flake, and described spring is connected with aluminium flake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620005260 CN2938267Y (en) | 2006-01-22 | 2006-01-22 | Friction demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620005260 CN2938267Y (en) | 2006-01-22 | 2006-01-22 | Friction demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2938267Y true CN2938267Y (en) | 2007-08-22 |
Family
ID=38362295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620005260 Expired - Fee Related CN2938267Y (en) | 2006-01-22 | 2006-01-22 | Friction demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2938267Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466530A (en) * | 2010-11-04 | 2012-05-23 | 兰州大学 | Friction meter |
| CN102663937A (en) * | 2012-05-08 | 2012-09-12 | 上海市闵行第二中学 | Friction direction demonstration system of driving wheels and driven wheels |
| CN106023736A (en) * | 2016-07-30 | 2016-10-12 | 董亚伦 | Physics teaching aid |
-
2006
- 2006-01-22 CN CN 200620005260 patent/CN2938267Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466530A (en) * | 2010-11-04 | 2012-05-23 | 兰州大学 | Friction meter |
| CN102466530B (en) * | 2010-11-04 | 2014-08-13 | 兰州大学 | Friction meter |
| CN102663937A (en) * | 2012-05-08 | 2012-09-12 | 上海市闵行第二中学 | Friction direction demonstration system of driving wheels and driven wheels |
| CN106023736A (en) * | 2016-07-30 | 2016-10-12 | 董亚伦 | Physics teaching aid |
| CN106023736B (en) * | 2016-07-30 | 2018-10-12 | 广州迅云教育科技有限公司 | Physics teaching teaching aid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |