CN203490879U - Frictional force measuring instrument - Google Patents
Frictional force measuring instrument Download PDFInfo
- Publication number
- CN203490879U CN203490879U CN201320557033.7U CN201320557033U CN203490879U CN 203490879 U CN203490879 U CN 203490879U CN 201320557033 U CN201320557033 U CN 201320557033U CN 203490879 U CN203490879 U CN 203490879U
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- friction block
- friction
- driving wheel
- frictional force
- block
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Abstract
The utility model relates to a frictional force measuring instrument, relating to the technical field of design of experimental devices for classroom use; the frictional force measuring instrument disclosed by the utility model comprises a bracket, a transmission device and a measuring device; the transmission device comprises an annular conveying belt; the annular conveying belt is sleeved on a driving wheel and a driven wheel arranged horizontally; the driving wheel and the driven wheel are respectively arranged on the bracket in a penetrating manner; the driving shaft of the driving wheel is connected to a power device; the measuring device comprises an electronic scale, a pressure block and a friction block; the pressure block is arranged above the electronic scale; the friction block is arranged above the annular conveying belt; at least one first circular hole is arranged on the upper surface of the friction block; and the top of the pressure block is connected with the friction block through a fine line passing through a fixed pulley. The frictional force measuring instrument disclosed by the utility model is high in precision, convenient for use and material-saving and is applied to measuring frictional force by students themselves or in classrooms.
Description
Technical field
The utility model relates to the design field, particularly a kind of friction measurement instrument of experimental provision for a kind of classroom.
Background technology
Traditional experimental provision of probing into force of sliding friction adopts weight beam, by pulling long plank, makes wooden unit generation relative sliding placed on it, produces force of sliding friction.Due to the plank pulling no matter its whether at the uniform velocity, wooden unit all remains static, balance between two forces, the size of friction just equals the registration of weight beam.And weight beam also remains static, be easy to read its registration.Obviously the design of this device wants section to learn many than directly drawing wooden unit to survey friction force, but conduct is quantitatively probed into and affected the factor of friction force size and still have obvious deficiency.The one, the friction force that records of experiment is smaller, and the scale division value of weight beam is larger, causes the ratio of precision that records lower; The 2nd, the distance of plank motion is long, causes the plank must be very long, makes experimental provision seem huge; The 3rd, the material that changes surface of contact is also inconvenient.
Utility model content
The utility model object is for above problem, provides a kind of precision friction measurement instrument high, easy to use.
The utility model comprises support, conveyer, measurement mechanism; Described conveyer comprises cycloconveyor belt, and described cycloconveyor belt is nested with on the driving wheel and engaged wheel of arranging in the horizontal direction, and described driving wheel and engaged wheel are set in respectively on support, the main drive shaft connecting power device of described driving wheel; Described measurement mechanism comprises electronic scales, briquetting, friction block; Described briquetting is arranged on the top of electronic scales, and described friction block is arranged on the top of cycloconveyor belt, and the upper surface of described friction block is provided with at least one first circular hole; The top of described briquetting is connected with friction block by the fine rule of pile warp fixed pulley.
The utility model in use, is first pressed respectively each function key of electronic scales, and the unit of putting is gram (g), then friction block is placed in to the centre of the scale pan, and the registration of reading electronic scales is the quality m of friction block
0, and be scaled the pressure F=m that travelling belt is subject to
0g; Its size is one of percentage of display screen registration, and unit is ox (N).Peeling after again briquetting being placed on the scale pan of electronic scales, makes zero electronic scales.Then friction block is lain against on travelling belt, brush line is crossed fixed pulley and is connected with friction block with briquetting respectively.Closing Switch, motor rotates, and makes, between travelling belt and friction block, relative sliding occurs, and reads the registration m(of electronic scales now as " 45 "), negative sign wherein represents decrease, 0-45=-45.Be converted into force of sliding friction, its size is 0.45N.
The utility model has the advantages that: 1) using briquetting as intermediary, pulling force is converted into pressure, just the merit of electronic scales can be expanded to survey friction force.2) electronic scales scale division value is 0.1g, is converted into dynamometer, and its scale division value can reach 0.001N, is one of percentage of weight beam 0.1N, and precision has improved 100 times.3) with conveying belt, replace long plank, electronic scales is again miniature, similar to the size of mobile phone, has greatly dwindled the volume of this experiment instrument, can carry easily, is applicable to student ' s family and uses.4) utilize the peeling function of electronic scales, can Quick Measurement.When surveying liquid quality, the quality of container can be removed, display screen can directly show liquid quality number.When surveying pulling force, the gravity of briquetting can be removed, display screen can directly show the size (demonstration number is negative value) of pulling force.5) this instrument except electronic scales (13.5 yuan of Mobile phone type electronic scales net postal valencys), hook code (being provided by laboratory), all the other can utilize waste and old three-ply board, food box, plastic water pipe and interface thereof, double faced adhesive tape, cloth, plastics etc. to be made, cost low and easily processing, and electronic scales energy automatic zero set (AZS) and automatically closing, there is electricity-saving function, more make this exploring instrument low-carbon (LC), green, environmental protection.
One of them side of friction block described in the utility model is provided with at least one second circular hole.The utility model has hook code holes at the upper surface of wooden unit and one of them side, can convert at the trial the contact area with conveying belt, again can accommodating hook code, change the size of pressure.
The section of friction block described in the utility model is rectangle, utilize three of rectangular parallelepiped not have round-meshed different surfaces and two round-meshed different surfaces, can obtain five different surface areas, when probing into of change lifting surface area tested, operation is very easy.
The lower surface of friction block described in the utility model is by web member connecting test part.Such as connecting the materials such as mirror surface paper, hardboard paper, plastic paper, cotton cloth, water sandpaper, to change the degree of roughness with conveying belt surface of contact.
Web member described in the utility model is double faced adhesive tape, and the lower surface of wooden unit is comparatively speaking more smooth, so double faced adhesive tape is fine separated with the lower surface of wooden unit, both convenient and reliable during use, saves again material.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the A-A of Fig. 1 is to cut-open view.
Embodiment
As shown in Figure 1, 2, the utility model comprises support 14, conveyer, measurement mechanism; Conveyer comprises cycloconveyor belt 1, and cycloconveyor belt 1 is nested with on the driving wheel 2 and engaged wheel 3 of arranging in the horizontal direction, and driving wheel 2 and engaged wheel 3 are set in respectively on support 14, the main drive shaft connecting power device 4 of driving wheel 2; Measurement mechanism comprises that electronic scales 5, briquetting 6, section are rectangular friction block 7; Briquetting 6 is arranged on the top of electronic scales 5, and friction block 7 is arranged on the top of cycloconveyor belt 1, and the upper surface 7-1 of friction block 7 is provided with four the first circular holes 8 that can place 50g hook code; One of them side 7-2 of friction block 7 is provided with two the second circular holes 9 that can place 50g hook code; The lower surface 7-3 of friction block 7 is by double faced adhesive tape 10 connecting test parts 11; Briquetting 6 tops are connected with friction block 7 by the fine rule 12 of pile warp fixed pulley 13.
Claims (5)
1. friction measurement instrument, comprises support, conveyer, measurement mechanism; It is characterized in that: described conveyer comprises cycloconveyor belt, described cycloconveyor belt is nested with on the driving wheel and engaged wheel of arranging in the horizontal direction, and described driving wheel and engaged wheel are set in respectively on support, the main drive shaft connecting power device of described driving wheel; Described measurement mechanism comprises electronic scales, briquetting, friction block; Described briquetting is arranged on the top of electronic scales, and described friction block is arranged on the top of cycloconveyor belt, and the upper surface of described friction block is provided with at least one first circular hole; Described briquetting top is connected with friction block by the fine rule of pile warp fixed pulley.
2. friction measurement instrument according to claim 1, is characterized in that: one of them side of described friction block is provided with at least one second circular hole.
3. friction measurement instrument according to claim 1, is characterized in that: the section of described friction block is rectangle.
4. friction measurement instrument according to claim 1, is characterized in that: the lower surface of described friction block is by web member connecting test part.
5. friction measurement instrument according to claim 4, is characterized in that: described web member is double faced adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557033.7U CN203490879U (en) | 2013-09-09 | 2013-09-09 | Frictional force measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557033.7U CN203490879U (en) | 2013-09-09 | 2013-09-09 | Frictional force measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203490879U true CN203490879U (en) | 2014-03-19 |
Family
ID=50261693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320557033.7U Expired - Fee Related CN203490879U (en) | 2013-09-09 | 2013-09-09 | Frictional force measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203490879U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985291A (en) * | 2014-06-09 | 2014-08-13 | 上海市第一中学 | Training aid for measuring friction coefficient |
-
2013
- 2013-09-09 CN CN201320557033.7U patent/CN203490879U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985291A (en) * | 2014-06-09 | 2014-08-13 | 上海市第一中学 | Training aid for measuring friction coefficient |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20140909 |
|
| EXPY | Termination of patent right or utility model |