CN201638425U - Friction demonstrator - Google Patents
Friction demonstrator Download PDFInfo
- Publication number
- CN201638425U CN201638425U CN2010201211149U CN201020121114U CN201638425U CN 201638425 U CN201638425 U CN 201638425U CN 2010201211149 U CN2010201211149 U CN 2010201211149U CN 201020121114 U CN201020121114 U CN 201020121114U CN 201638425 U CN201638425 U CN 201638425U
- Authority
- CN
- China
- Prior art keywords
- friction
- demonstration
- side plate
- sliding friction
- matrix
- 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
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A friction demonstrator comprises a basal body through which an inside object can be observed, wherein one end of a dynamometer is fixed at the interior middle part of a side plate of the basal body, and the other end thereof is connected with a handle through a stay cord penetrating another side plate of the basal body; the top surface of the basal body serves as a sliding friction demonstration surface; and rollers are mounted on the bottom surface of the basal body, so that the bottom surface can serve as a rolling friction demonstration surface. When the demonstrator is used for sliding friction demonstration, the sliding friction demonstration surface is downwardly positioned on a plane, and the handle is pulled at a constant speed for a user to observe the value indicated on the dynamometer; weights with different masses can be positioned one after another on the upward rolling friction demonstration surface to prove the conclusion that frictional force is related to pressure; the sliding friction demonstration surface can be positioned on planes with different roughnesses to prove the conclusion that frictional force is related to the roughness of a contact surface; and regarding the comparison between sliding friction and rolling friction, the sliding friction demonstration surface and the rolling friction demonstration surface can be sequentially positioned on the same plane, so as to prove the conclusion that under the same condition, sliding frictional force is larger than rolling frictional force. The demonstrator has simple and convenient operation and small experimental errors, and is intuitive and accurate.
Description
Technical field
The utility model relates to a kind of physics teaching aid, a kind of specifically friction force education demonstration device.
Background technology
In the junior physics textbook, the experiment relevant with which factor with force of rolling friction of a research force of sliding friction arranged, for this reason, teacher always takes a simple teaching aid to do experiment for classmates, allows classmates can obtain profound understanding.Existing this experiment teaching aid structure is disperseed, and experimental error is big, and experiment is inconvenient, and accuracy and intuitive are relatively poor, also cause the failure of an experiment through regular meeting.The Chinese patent literature patent No. is 200520080387.2 " frictional experiment demonstration instrument for teaching ", disclosed technical scheme is on a fixed mount, spring balance is installed on the slide mechanism, spring balance connects the slide block that is located on the endless conveyor belt by backguy, is driven the endless conveyor belt of doing uniform rotation by slowspeed machine.This mechanism 1. structure is complicated, and intuitive is relatively poor, is unfavorable for demonstration; 2. adopt slowspeed machine to drive, experimental result is subject to the power-supply fluctuation influence; 3. because be a plane device, on the classroom, be unfavorable for demonstrating operation to the student.The patent No. is 200720123020.3 " friction force demonstration device " in addition, and 1. this device can only carry out the sliding friction demonstration, can't carry out the rolling friction demonstration; 2. fixed pulley and traction rope have friction force, increase experimental error.
Summary of the invention
Goal of the invention of the present utility model is to avoid the defective of prior art and proposes a kind of simple in structure, easy and simple to handle, intuitive is strong, accuracy is high friction force demonstration device.
Goal of the invention of the present utility model is finished by the following technical programs.
A kind of friction force demonstration device, include the matrix of a forward and backward visual built-in thing, dynamometer one end is fixed on the matrix interior middle part of side plate on one side, the other end passes matrix another side side plate by the stay cord that connects and connects handle, it is characterized in that described matrix end face is a sliding friction demonstration face, the bottom surface is equipped with roller, is rolling friction demonstration face.
Open no side plate or make forward and backward side plate for forward and backward of the matrix of the forward and backward visual built-in thing of described demonstration device with transparent material.
Described stay cord passes matrix side plate place bearing is installed.
Compared with prior art, the device that this device will disperse originally is designed to integrated, with upper and lower two faces of device respectively as demonstrating sliding friction and rolling friction, make experimental implementation easy, have more intuitive and accuracy, reduced experimental error, this device has been made material object, in teaching and study, use, be subjected to teachers and students' welcome deeply.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
To be described further again the utility model embodiment by above-mentioned accompanying drawing below.
Referring to Fig. 1, the friction force demonstration device, it includes a matrix 1 that is shaped as frame, no side plate is opened on its forward and backward two sides, visual built-in thing---dynamometer, dynamometer 3 one ends are fixed on the matrix interior middle part of side plate on one side, and the other end connects stay cord 4, stay cord passes matrix 1 another side side plate and connects handle 6, produce friction when preventing that stay cord from passing the matrix another side, so another is pressed into bearing 5 in lateral opening at matrix, like this, even stay cord and dead eye are wiped and bumped, can not cause too big frictional resistance yet.The end face of matrix is an even surface, and as sliding friction demonstration face 2, the bottom surface is equipped with roller 8, as rolling friction demonstration face 7.
During friction force demonstration, sliding friction is demonstrated face 2 towards transferring on the plane, on rolling friction demonstration face 7, do not put counterweight earlier, at the uniform velocity the pulling handle 6, observe and write down the indicating value of dynamometer 3, this moment, no matter the indicating value of dynamometer was that teacher demonstrates to the student, or grouping experiment, can both allow the student see too clearly.Then, put the counterweight of 100 grams and 200 yuan on rolling friction the up demonstration face 7 respectively, at the uniform velocity pulling shakes hands 6, writes down the value of twice dynamometer 3 respectively, just can draw the pressure-dependent conclusion of friction force very intuitively.Be put into when spurring on the different face of degree of roughness if face 2 is demonstrated in sliding friction, can allow the student draw the friction force conclusion relevant very intuitively equally with the surface of contact degree of roughness.
When sliding friction relatively and rolling friction big or small, only need earlier face 2 to be demonstrated in sliding friction and be placed on the plane, at the uniform velocity pulling shakes hands 6, observes and write down the indicating value of dynamometer 3; And then face 7 is demonstrated in rolling friction be put on the same plane, at the uniform velocity the pulling handle 6, observe and write down dynamometer 3 indicating values, and relatively the size of twice friction force that writes down has just drawn under the same conditions, and force of sliding friction is greater than the conclusion of force of rolling friction.
Claims (3)
1. friction force demonstration device, include the matrix (1) of a forward and backward visual built-in thing, dynamometer (3) one ends are fixed on the matrix interior middle part of side plate on one side, the other end passes matrix another side side plate by the stay cord (4) that connects and connects handle (6), it is characterized in that described matrix (1) end face is a sliding friction demonstration face (2), the bottom surface is equipped with roller (8), is rolling friction demonstration face (7).
2. friction force demonstration device according to claim 1 is characterized in that forward and backward of matrix (1) of the forward and backward visual built-in thing of described demonstration device opens no side plate or make forward and backward side plate with transparent material.
3. friction force demonstration device according to claim 1 and 2 is characterized in that described stay cord (4) passes matrix (1) side plate place bearing (5) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201211149U CN201638425U (en) | 2010-02-26 | 2010-02-26 | Friction demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201211149U CN201638425U (en) | 2010-02-26 | 2010-02-26 | Friction demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638425U true CN201638425U (en) | 2010-11-17 |
Family
ID=43082930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201211149U Expired - Fee Related CN201638425U (en) | 2010-02-26 | 2010-02-26 | Friction demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638425U (en) |
Cited By (2)
| 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 |
| CN110533997A (en) * | 2019-09-11 | 2019-12-03 | 罗森聪 | Integrated demonstration experimental device for the experiment of physical friction power |
-
2010
- 2010-02-26 CN CN2010201211149U patent/CN201638425U/en not_active Expired - Fee Related
Cited By (2)
| 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 |
| CN110533997A (en) * | 2019-09-11 | 2019-12-03 | 罗森聪 | Integrated demonstration experimental device for the experiment of physical friction power |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205810215U (en) | Sound frictional force contrast experiment's device | |
| CN206726589U (en) | A kind of elastic potential energy experimental provision for being easy to high school student to understand | |
| CN205281913U (en) | Inclined plane gravity decomposes teaching demonstration ware | |
| CN201638425U (en) | Friction demonstrator | |
| CN2775775Y (en) | Friction test teaching demonstration instrument | |
| CN206021688U (en) | Physics inclined-plane motion simulation demonstrating apparatus | |
| CN204010435U (en) | Force of sliding friction demonstration instrument for teaching | |
| CN206649787U (en) | A kind of frictional force experiment instrument | |
| CN206946782U (en) | A kind of Middle School Physics frictional force experiment teaching aid | |
| CN108877425A (en) | A kind of high school physics study apparatus for demonstrating | |
| CN204087626U (en) | Gravity accelerates one degree of survey meters | |
| CN202267553U (en) | Detection device for elasticity of plate spring | |
| CN107993535A (en) | A kind of physical study friction force demonstration device | |
| CN203799535U (en) | Maximum static friction force exploration device | |
| CN204143708U (en) | One probes into friction force rule detection instrument | |
| CN206685015U (en) | A kind of friction measurement instrument | |
| CN201549104U (en) | Circular motion demonstrating device | |
| CN207610802U (en) | A kind of weight beam with peak value display function | |
| CN206411965U (en) | A kind of mechanics teaching demonstration device | |
| CN206975885U (en) | A kind of mechanics apparatus for demonstrating | |
| CN207731526U (en) | intelligent sensing technology application platform | |
| CN206649775U (en) | A kind of physics teaching experiment instrument | |
| CN203689770U (en) | Moment balance experimental device used for teaching | |
| CN103578330B (en) | Friction force exploring instrument | |
| CN204832757U (en) | Projection curtain device that school removed with being convenient for |
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: 20101117 Termination date: 20110226 |