CN201302774Y - Friction force demonstrator - Google Patents
Friction force demonstrator Download PDFInfo
- Publication number
- CN201302774Y CN201302774Y CNU2008202261345U CN200820226134U CN201302774Y CN 201302774 Y CN201302774 Y CN 201302774Y CN U2008202261345 U CNU2008202261345 U CN U2008202261345U CN 200820226134 U CN200820226134 U CN 200820226134U CN 201302774 Y CN201302774 Y CN 201302774Y
- Authority
- CN
- China
- Prior art keywords
- slide block
- friction force
- force
- flat car
- flat
- 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 force demonstrator belonging to physical mechanics educational apparatus. The demonstrator comprises a base, a flat car, a slide block and a force gauge, and has a structure that a supporting stand is arranged on one end of the base in vertical direction, the force gauge is fixed on the supporting stand in horizontal direction, the slide block which is connected with the force gauge via a lead-in wire is arranged on the flat car whose one end is provided with a pull wire. The friction force demonstrator has the advantages that the flat car is pulled in uniform speed by utilizing external force so that the slide block whose one end is connected with the fixed force gauge can be stationary relative to ground, and the value of sliding friction force which is given from the flat car to the slide block is the same as force gauge reading, thereby being convenient for getting the force gauge reading and liable to holding the motion state of the slide block, moreover, the flat car can be pulled in uniform speed by a small direct current motor, thus the experimental accuracy is improved, and the calculating formula of sliding friction force can be totally tested through changing the material of slide block bottom or flat car surface.
Description
Technical field
The utility model belongs to the physical mechanics instruments used for education, particularly is applicable to the experimental apparatus of checking friction calculation formula.
Background technology
The experimental apparatus of general checking friction calculation formula all is directly to spur slide block with external force, can not accurately measure the size of friction force like this, and the accuracy of experiment is not high.
The utility model content
Measure inconvenience in order to overcome existing friction force demonstration instrument, the deficiency that accuracy is not high, the utility model provides a kind of friction force demonstration device, and this friction force demonstration device can be measured friction force easily, and accuracy is than higher.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of friction force demonstration device, comprise base, flat-bed trailer, slide block, dynamometer, its structure is: the end vertical direction at described base is fixed a support, on described support, become fixedly dynamometer of horizontal direction, place a slide block that is connected with described dynamometer by lead-in wire on described flat-bed trailer, an end of described flat-bed trailer has backguy.
The material that the bottom surface of the slide block of described friction force demonstration device or the surface of flat-bed trailer can add different coefficients of friction.
Connecting a direct-flow small motor in the backguy of one end of described flat-bed trailer.
The beneficial effects of the utility model are to utilize external force at the uniform velocity to spur flat-bed trailer, make the one end static with slide block relative ground on flat-bed trailer that the dynamometer of fixing connects, then flat-bed trailer is identical with the dynamometer registration to the value of the force of sliding friction of slide block, be convenient to read the dynamometer registration like this, the motion state of slide block is easy to hold, and can utilize a direct-flow small motor at the uniform velocity to spur flat-bed trailer, improved the accuracy of experiment like this, change slide block bottom surface or flat-bed trailer Facing material, can also verify the computing formula of force of sliding friction comprehensively.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model,
Among the figure: 1. base, 2. support, 3. dynamometer, 4. slide block, 5. flat-bed trailer, 6. mass, 7. backguy, 8. direct-flow small motor.
Embodiment
Embodiment of the present utility model is, as shown in the figure:
Embodiment 1, a kind of friction force demonstration device, comprise base 1, flat-bed trailer 5, slide block 4, dynamometer 3, end vertical direction at described base 1 is fixed a support 2, on described support 2, become fixedly dynamometer 3 of horizontal direction, on described flat-bed trailer 5, place a slide block 4 that is connected with described dynamometer 3 by lead-in wire, one end of described flat-bed trailer has backguy 7, utilize external force means at the uniform velocity to spur flat-bed trailer 5, when the registration of dynamometer 3 is relatively stable, force of sliding friction between slide block 4 and the flat-bed trailer 5 greater than the registration value that just equals dynamometer 3, in experimentation repeatedly, can on slide block 4, add the mass 6 of Different Weight, calculate the corresponding normal pressure of slide block 4 and 6 pairs of flat-bed trailers 5 of mass, read the registration of dynamometer 3 then, thereby draw the relation of force of sliding friction size and normal pressure.
Embodiment 2, a kind of friction force demonstration device, comprise base 1, flat-bed trailer 5, slide block 4, dynamometer 3, end vertical direction at described base 1 is fixed a support 2, on described support 2, become fixedly dynamometer 3 of horizontal direction, place a slide block 4 that is connected with described dynamometer 3 by lead-in wire on described flat-bed trailer 5, the direct-flow small motor 8 that the backguy 7 of an end of described flat-bed trailer is connecting can at the uniform velocity spur flat-bed trailer.
The utility model can also be in the bottom surface of slide block 4 or the material of the additional different coefficients of friction in the surface of flat-bed trailer 5 verify the force of sliding friction computing formula.
Claims (4)
1. friction force demonstration device, comprise base, flat-bed trailer, slide block, dynamometer, it is characterized in that: the end vertical direction at described base is fixed a support, on described support, become the fixing described dynamometer of horizontal direction, place a described slide block that is connected with described dynamometer by lead-in wire on described flat-bed trailer, an end of described flat-bed trailer has backguy.
2. according to claims 1 described friction force demonstration device, it is characterized in that: the material that can add different coefficients of friction in the bottom surface of slide block.
3. according to claims 1 described friction force demonstration device, it is characterized in that: the material that can add different coefficients of friction on the surface of flat-bed trailer.
4. according to claims 1 described friction force demonstration device, it is characterized in that: connecting a direct-flow small motor in the backguy of an end of described flat-bed trailer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202261345U CN201302774Y (en) | 2008-11-20 | 2008-11-20 | Friction force demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202261345U CN201302774Y (en) | 2008-11-20 | 2008-11-20 | Friction force demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201302774Y true CN201302774Y (en) | 2009-09-02 |
Family
ID=41086403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202261345U Expired - Fee Related CN201302774Y (en) | 2008-11-20 | 2008-11-20 | Friction force demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201302774Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208148A (en) * | 2011-05-23 | 2011-10-05 | 韩进荣 | Novel physical experiment demonstration device |
| CN103473973A (en) * | 2013-10-08 | 2013-12-25 | 熊德永 | Sliding friction force demonstration device |
| PL424484A1 (en) * | 2018-02-02 | 2019-08-12 | Politechnika Poznańska | Method for determination of the rolling resistance coefficient for objects equipped with the trolley system |
| PL424483A1 (en) * | 2018-02-02 | 2019-08-12 | Politechnika Poznańska | Device for measuring of the rolling resistance force of the objects equipped with the trolley system |
-
2008
- 2008-11-20 CN CNU2008202261345U patent/CN201302774Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208148A (en) * | 2011-05-23 | 2011-10-05 | 韩进荣 | Novel physical experiment demonstration device |
| CN103473973A (en) * | 2013-10-08 | 2013-12-25 | 熊德永 | Sliding friction force demonstration device |
| PL424484A1 (en) * | 2018-02-02 | 2019-08-12 | Politechnika Poznańska | Method for determination of the rolling resistance coefficient for objects equipped with the trolley system |
| PL424483A1 (en) * | 2018-02-02 | 2019-08-12 | Politechnika Poznańska | Device for measuring of the rolling resistance force of the objects equipped with the trolley system |
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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: 20090902 Termination date: 20091221 |