CN204667720U - Friction coefficient demonstration device - Google Patents
Friction coefficient demonstration device Download PDFInfo
- Publication number
- CN204667720U CN204667720U CN201520209152.2U CN201520209152U CN204667720U CN 204667720 U CN204667720 U CN 204667720U CN 201520209152 U CN201520209152 U CN 201520209152U CN 204667720 U CN204667720 U CN 204667720U
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- China
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- base
- pad
- head rod
- hinged
- rotating shaft
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Abstract
The utility model proposes a kind of friction coefficient demonstration device, the friction factor of the medium of demonstration unlike material that can be directly perceived, lively and friction force.A kind of friction coefficient demonstration device, comprise base, the rotating shaft of base is connected with back up pad, base and cylinders, cylinder upper end is connected with Connection Block, and Connection Block is hinged and connected by rotating shaft, split pin and head rod lower end, on the supporting seat of head rod upper end thereof below back up pad, head rod is hinged and connected by rotating shaft, split pin and the second connecting link, and the second connecting link and base are hinged and connected, and are provided with elastic reducing-fixing band above back up pad.The utility model can change flat board as required, and then tries to achieve the friction factor of different article, by the size at back up pad angle of inclination, can compare the size of unlike material plate frictional coefficient intuitively.
Description
Technical field
The utility model relates to a kind of physics teaching device, is specifically related to the device of a kind of demonstration friction and friction factor.
Background technology
In middle school teaching process, need the problem of instructing student about friction factor and friction force.Friction force equals friction factor and is multiplied by pressure, when object uniform motion time, is easy to calculate friction factor.The friction factor on different medium surface is different, when being only books teaching, and can not be lively explain to classmate.Therefore, design a instructional device that can show different medium friction factor size and account form, be very beneficial for classmates one impression intuitively.
Utility model content
The utility model proposes a kind of friction coefficient demonstration device, the friction factor of the medium of demonstration unlike material that can be directly perceived, lively and friction force.
The technical solution of the utility model is achieved in that a kind of friction coefficient demonstration device, comprise base, the rotating shaft of base is connected with back up pad, base and cylinders, cylinder upper end is connected with Connection Block, Connection Block is hinged and connected by rotating shaft, split pin and head rod lower end, on the supporting seat of head rod upper end thereof below back up pad, head rod is hinged and connected by rotating shaft, split pin and the second connecting link, second connecting link and base are hinged and connected, and are provided with elastic reducing-fixing band above back up pad.
Described base is hollow, and base side wall is provided with the step coordinated with back up pad.
Described base one end is vertically provided with slide rail, is provided with baffle plate in slide rail.
Described back up pad sidewall is provided with scale mark, and base is provided with angel measuring instrument.
The utility model can change flat board as required, and then tries to achieve the friction factor of different article, by the size at back up pad angle of inclination, can compare the size of unlike material plate frictional coefficient intuitively.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the schematic top plan view of Fig. 1.
Wherein: 1. base, 2. cylinder, 3. Connection Block, 4. head rod, 5. back up pad, 6. elastic reducing-fixing band, 7. the second connecting link, 8. baffle plate, 9. step.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not paying the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As depicted in figs. 1 and 2, a kind of friction coefficient demonstration device, comprise base 1, the rotating shaft of base 1 is connected with back up pad 5, base 1 is connected with cylinder 2, cylinder 2 upper end is connected with Connection Block 3, Connection Block 3 is hinged and connected by rotating shaft, split pin and head rod 4 lower end, on the supporting seat of head rod 4 upper end thereof below back up pad 5, head rod 4 is hinged and connected by rotating shaft, split pin and the second connecting link 7, second connecting link 7 is hinged and connected with base 1, is provided with elastic reducing-fixing band 6 above back up pad 5.Base 1 can rotate around back up pad 5, when cylinder 2 is flexible time, drives back up pad 5 to rotate by head rod and the second connecting link.
The utility model is when demonstration, respectively the dull and stereotyped two ends of different coefficients of friction are placed on below elastic reducing-fixing band 6, by elastic reducing-fixing band 6, flat board are fixed, afterwards article are placed on dull and stereotyped top, slowly adjust the flexible of cylinder 2, until article just can from landing position flat board.The now landing of article is almost close at the uniform velocity, and object gives dull and stereotyped pressure N=Mg*cos α, friction force f=Mg*sin α, therefore, and coefficientoffrictionμ=f/N=tg α.Wherein, M is the weight of article, and α is the angle between back up pad 5 and base 1.The utility model can change flat board as required, and then tries to achieve the friction factor of different article, by the size at back up pad 5 angle of inclination, can compare the size of unlike material plate frictional coefficient intuitively.
Preferably, described base 1 is hollow, and base 1 sidewall is provided with the step 9 coordinated with back up pad 5.After demonstration is complete, take off the split pin of the second connecting link 7 upper end and head rod 4 lower end, directly back up pad 5 can be folded to base 1 inner, step 9 can be played a supporting role.Soly arrange the arrangement of comparing and being convenient to article, after having demonstrated, split pin and article can directly be placed in base 1.
As preferred further, described base 1 one end is vertically provided with slide rail, is provided with baffle plate 8 in slide rail.When baffle plate 8 slides into the top time, the article from top landing can be stopped, after having demonstrated, directly baffle plate 8 slide downward can be fallen in base 1.
A step again, described back up pad 5 sidewall is provided with scale mark, base 1 is provided with angel measuring instrument.Be convenient to the landing situation of observing article by scale mark, and angel measuring instrument more accurately can show the angle of inclination of back up pad 5 intuitively.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a friction coefficient demonstration device, comprise base (1), the rotating shaft of base (1) is connected with back up pad (5), it is characterized in that: base (1) is connected with cylinder (2), cylinder (2) upper end is connected with Connection Block (3), Connection Block (3) passes through rotating shaft, split pin and head rod (4) lower end are hinged and connected, head rod (4) upper end thereof is on the supporting seat of back up pad (5) below, head rod (4) passes through rotating shaft, split pin and the second connecting link (7) are hinged and connected, second connecting link (7) and base (1) are hinged and connected, back up pad (5) top is provided with elastic reducing-fixing band (6).
2. friction coefficient demonstration device according to claim 1, is characterized in that: described base (1) is hollow, and base (1) sidewall is provided with the step (9) coordinated with back up pad (5).
3. friction coefficient demonstration device according to claim 2, is characterized in that: described base (1) one end is vertically provided with slide rail, is provided with baffle plate (8) in slide rail.
4. friction coefficient demonstration device according to claim 3, is characterized in that: described back up pad (5) sidewall is provided with scale mark, and base (1) is provided with angel measuring instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209152.2U CN204667720U (en) | 2015-04-09 | 2015-04-09 | Friction coefficient demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209152.2U CN204667720U (en) | 2015-04-09 | 2015-04-09 | Friction coefficient demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204667720U true CN204667720U (en) | 2015-09-23 |
Family
ID=54138080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520209152.2U Expired - Fee Related CN204667720U (en) | 2015-04-09 | 2015-04-09 | Friction coefficient demonstration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204667720U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036017A (en) * | 2018-09-10 | 2018-12-18 | 任浩田 | A kind of high school student's physics frictional experiment demonstrator |
| CN109671339A (en) * | 2019-02-26 | 2019-04-23 | 马子羿 | A kind of frictional force experimental demonstration device |
-
2015
- 2015-04-09 CN CN201520209152.2U patent/CN204667720U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036017A (en) * | 2018-09-10 | 2018-12-18 | 任浩田 | A kind of high school student's physics frictional experiment demonstrator |
| CN109671339A (en) * | 2019-02-26 | 2019-04-23 | 马子羿 | A kind of frictional force experimental demonstration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |