CN202487033U - Teaching aid for demonstrating force arm - Google Patents
Teaching aid for demonstrating force arm Download PDFInfo
- Publication number
- CN202487033U CN202487033U CN2012201121527U CN201220112152U CN202487033U CN 202487033 U CN202487033 U CN 202487033U CN 2012201121527 U CN2012201121527 U CN 2012201121527U CN 201220112152 U CN201220112152 U CN 201220112152U CN 202487033 U CN202487033 U CN 202487033U
- Authority
- CN
- China
- Prior art keywords
- force
- rod
- force arm
- arm
- sleeve
- 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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Abstract
The utility model provides a teaching aid for demonstrating a force arm. A vertical rod is fixed on a base; a transverse rotating shaft is arranged on the vertical rod; a force arm rod is inserted in the transverse rotating shaft; a balance weight is suspended at one end of the force arm rod; a sleeve which can slide along the force arm rod is sleeved at the other end of the force arm rod; a force rod is fixed on the sleeve; and the direction of the force rod is perpendicular to the force arm rod. When a force arm concept is explained, the force arm rod represents the force arm, and the force rod represents a working line of force. The sleeve slides along the force arm rod, and the force rod fixed on the sleeve moves along with the sliding of the sleeve, so that the force arm is changed; and under the condition that the balance weight is not changed, the force acting on the vertical rod is correspondingly changed.
Description
Technical field
The utility model relates to a kind of educational aid that is used for arm of force demonstration.
Background technology
In physics teaching, when the notion of explanation moment and size, classmates understand comparatively difficulty.In the textbook, moment equal the arm of force and power with, formula is more abstract, can not well let classmates understand.
Summary of the invention
The technical matters that the utility model will solve provides a kind of educational aid that is used for arm of force demonstration.
In order to solve the problems of the technologies described above, the technical scheme of the utility model is:
A kind of educational aid that is used for arm of force demonstration; On the basis, be fixed with a vertical rod, vertical rod is provided with horizontal rotating shaft, laterally is installed with arm bar in the rotating shaft; One end of arm bar hangs with counterweight; The other end is with can be along the sleeve of bar slip, fixing strong bar on the sleeve, and the direction of power bar is perpendicular to arm bar.
When the notion of the explanation arm of force, arm bar is represented the arm of force, and the power bar is represented line of action of force.Along the bar sliding sleeve, power bar fixing on the sleeve also and then moves, so the arm of force has also just produced variation.Under the constant situation of counterweight, act on also just corresponding variation of power in the vertical rod.
Description of drawings
Below in conjunction with accompanying drawing the embodiment of the utility model is done further detailed explanation:
Fig. 1 is the structural representation of the utility model.
Among the figure: 1 basis, 2 counterweights, 3 horizontal rotating shafts, 4 arm bars, 5 sleeves, 6 power bars, 7 vertical rods.
Embodiment
As shown in Figure 1, a kind of educational aid that is used for arm of force demonstration is fixed with a vertical rod 7 on basis 1; Vertical rod is provided with horizontal rotating shaft 3; Laterally be installed with arm bar 4 in the rotating shaft, an end of arm bar hangs with counterweight 2, and the other end is with can be along the sleeve 5 of bar slip; Fixing strong bar 6 on the sleeve, the direction of power bar is perpendicular to arm bar.
In the explanation process, the utility model can let classmates recognize the notion of moment vividerly, motivates students' interest in learning.
Claims (1)
1. one kind is used for the educational aid that the arm of force is demonstrated; It is characterized in that: on the basis, be fixed with a vertical rod, vertical rod is provided with horizontal rotating shaft, laterally is installed with arm bar in the rotating shaft; One end of arm bar hangs with counterweight; The other end is with can be along the sleeve of bar slip, fixing strong bar on the sleeve, and the direction of power bar is perpendicular to arm bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201121527U CN202487033U (en) | 2012-03-23 | 2012-03-23 | Teaching aid for demonstrating force arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201121527U CN202487033U (en) | 2012-03-23 | 2012-03-23 | Teaching aid for demonstrating force arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202487033U true CN202487033U (en) | 2012-10-10 |
Family
ID=46961438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201121527U Expired - Fee Related CN202487033U (en) | 2012-03-23 | 2012-03-23 | Teaching aid for demonstrating force arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202487033U (en) |
-
2012
- 2012-03-23 CN CN2012201121527U patent/CN202487033U/en not_active Expired - Fee Related
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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: 20121010 Termination date: 20130323 |