CN217955309U - Experiment teaching aid for friction force teaching - Google Patents
Experiment teaching aid for friction force teaching Download PDFInfo
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- CN217955309U CN217955309U CN202221780060.6U CN202221780060U CN217955309U CN 217955309 U CN217955309 U CN 217955309U CN 202221780060 U CN202221780060 U CN 202221780060U CN 217955309 U CN217955309 U CN 217955309U
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Abstract
The utility model discloses an experiment teaching aid for frictional force teaching, including the desktop main part, the upper surface of desktop main part is provided with rough surface, the mar face, normal desktop and smooth desktop, rough surface's top is provided with the sliding block, the upper end fixed mounting of desktop main part has the barrier plate, the front end of sliding block is provided with the connecting wire, the bottom of connecting wire is connected with the couple, the front end of desktop main part is provided with the rotation pulley, the below of desktop main part is connected with electronic lift post, the surface mounting of smooth desktop has smooth track, smooth orbital front end fixedly connected with blocks the piece, the lower surface mounting of desktop main part has the fixed block, be provided with the pivot between fixed block and the electronic lift post, the utility model discloses in, through the setting of different rough surface, can verify, the frictional force of rough surface's production is greater than the frictional force that normal desktop produced of mar face, compare in rough surface, mar face and normal desktop, the frictional force of smooth desktop is minimum.
Description
Technical Field
The utility model relates to a frictional force teaching field especially relates to an experiment teaching aid for frictional force teaching.
Background
When two objects, which are in contact with each other and pressed against each other, move or have a tendency to move relative to each other, a force resisting the relative movement or the tendency to move relative to each other is generated on the contact surfaces, which force is called a friction force (Ff or f).
The direction of the frictional force is opposite to the direction of the relative movement or the tendency of the relative movement of the objects.
The reasons for the friction between solid surfaces are two: the solid surface atoms, the mutual attraction between molecules (energy requirement for chemical bond recombination, adhesive force) and the surface roughness between them cause a resistance to mutual sticking.
At present, for the experiment of friction, a teacher is inconvenient to realize in class, and students cannot feel the friction intuitively, so that an experiment teaching aid for friction teaching is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, and the experiment teaching aid who is used for frictional force teaching that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an experiment teaching aid for frictional force teaching, includes the desktop main part, the upper surface of desktop main part is provided with rough surface, mar face, normal desktop and smooth desktop, rough surface's top is provided with the sliding block, the upper end fixed mounting of desktop main part has the barrier plate, the front end of sliding block is provided with the connecting wire, the bottom of connecting wire is connected with the couple, the front end of desktop main part is provided with the rotation pulley, the below of desktop main part is connected with electronic lift post, the surface mounting of smooth desktop has smooth track, smooth orbital front end fixedly connected with blocks the piece, the lower surface mounting of desktop main part has the fixed block, be provided with the pivot between fixed block and the electronic lift post.
As a further description of the above technical solution:
the rough surface, the mar face, normal desktop and smooth desktop fixed mounting are at the upper surface of desktop main part, the rough surface, the mar face, the size of normal desktop and smooth desktop is the same, the roughness of rough surface is greater than the roughness of mar face, the roughness of mar face is greater than the roughness of normal desktop, the roughness of normal desktop is greater than the roughness of sliding block.
As a further description of the above technical solution:
smooth track fixed mounting is on the surface of smooth desktop, smooth orbital surface is smooth, smooth orbital quantity is two, the size that blocks the piece is greater than smooth orbital size, the quantity that blocks the piece is two.
As a further description of the above technical solution:
the sliding block is placed on the surface of the desktop main body, the number of the sliding blocks is four, the blocking plate is fixedly installed above the desktop main body, the number of the blocking plate is a plurality of, and the desktop main body is divided into four parts, namely a rough surface, a scratch surface, a normal desktop and a smooth desktop, by the blocking plate.
As a further description of the above technical solution:
the one end and the sliding block fixed connection of connecting wire, the other end and the couple fixed connection of connecting wire, the quantity of connecting wire is four, the quantity that rotates the pulley is four, the surface that rotates the pulley is smooth.
As a further description of the above technical solution:
the fixed block fixed mounting has the pivot in the bottom of desktop main part, the below activity of fixed block, the below swing joint of pivot has electronic lift post, the quantity of electronic lift post is four.
The utility model discloses following beneficial effect has:
the utility model discloses in, through the setting of the rough surface of difference, can verify, the frictional force of the production of mat surface is greater than the frictional force that the mar face produced and is greater than the frictional force that normal desktop produced, compare in the mat surface, mar face and normal desktop, the frictional force of smooth desktop is minimum, can make the very quick skating of sliding block through smooth orbital setting, almost not produce frictional force, and can prevent that the sliding block from dropping through the setting that stops the piece, through the setting of couple, can connect the heavy object below it, make it drive the sliding block lapse through the connecting wire, thereby carry out the experiment of frictional force.
Drawings
Fig. 1 is a schematic view of the overall structure of an experimental teaching aid for friction force teaching according to the present invention;
fig. 2 is a plan view of a smooth tabletop of an experimental teaching aid for friction teaching according to the present invention;
fig. 3 is the utility model provides a front view of an experiment teaching aid for frictional force teaching.
Illustration of the drawings:
1. a tabletop main body; 2. a rough surface; 3. scratching the surface; 4. a normal desktop; 5. a smooth tabletop; 6. a slider; 7. a blocking plate; 8. a connecting wire; 9. rotating the pulley; 10. hooking; 11. an electric lifting column; 12. a smooth track; 13. a blocking block; 14. a fixed block; 15. a rotating shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, the present invention provides an embodiment: the utility model provides an experiment teaching aid for frictional force teaching, including desktop main part 1, the upper surface of desktop main part 1 is provided with mat surface 2, mar face 3, normal desktop 4 and smooth desktop 5, mat surface 2's top is provided with sliding block 6, desktop main part 1's upper end fixed mounting has stop plate 7, sliding block 6's front end is provided with connecting wire 8, connecting wire 8's bottom is connected with couple 10, desktop main part 1's front end is provided with rotating pulley 9, desktop main part 1's below is connected with electronic lift post 11, smooth desktop 5's surface mounting has smooth track 12, smooth track 12's front end fixed connection has stop block 13, desktop main part 1's lower surface mounting has fixed block 14, be provided with pivot 15 between fixed block 14 and the electronic lift post 11.
The utility model discloses in, mat surface 2, mar face 3, normal desktop 4 and 5 fixed mounting of smooth desktop are at the upper surface of desktop main part 1, mat surface 2, mar face 3, normal desktop 4 is the same with smooth desktop 5's size, the roughness of mat surface 2 is greater than the roughness of mar face 3, the roughness of mar face 3 is greater than the roughness of normal desktop 4, the roughness of normal desktop 4 is greater than the roughness of sliding block 6, the size of frictional force is relevant with the roughness of contact surface, setting through different rough surface, can verify, the frictional force that the frictional force of the production of mat surface 2 is greater than the frictional force that scratch face 3 produced and is greater than the frictional force that normal desktop 4 produced, compare in mat surface 2, mar face 3 and normal desktop 4, smooth desktop 5's frictional force is minimum.
Specifically, through the arrangement of different surfaces, the magnitude of the friction force is related to the roughness of the contact surface, and the rougher the surface is, the larger the friction force is, the smoother the surface is, and the smaller the friction force is.
Further, smooth track 12 fixed mounting is on the surface of smooth desktop 5, and smooth track 12's surface is smooth, and smooth track 12's quantity is two, and the size that blocks piece 13 is greater than smooth track 12's size, and the quantity that blocks piece 13 is two, can make very quick the gliding of sliding block 6 through smooth track 12's setting, hardly produces frictional force, can prevent sliding block 6 through the setting that blocks piece 13 moreover and drop.
Further, sliding block 6 is placed on the surface of desktop main part 1, sliding block 6's quantity is four, 7 fixed mounting of barrier plate are in the top of desktop main part 1, the quantity of barrier plate 7 is a plurality of, desktop main part 1 has been divided into rough surface 2 by barrier plate 7, mar face 3, normal desktop 4 and smooth desktop 5 four parts, through the setting of barrier plate 7, when experimenting, accomplish not producing the interference each other, part every, can guarantee the accuracy of experiment.
Further, 8's one end of connecting wire and 6 fixed connection of sliding block, 8's the other end and couple 10 fixed connection of connecting wire, 8's quantity is four, and the quantity of rotating pulley 9 is four, and the surface of rotating pulley 9 is smooth, through the setting of couple 10, can connect the heavy object in its below, makes it drive 6 downslide of sliding block through connecting wire 8 to carry out the experiment of frictional force.
Further, 14 fixed block fixed mounting have pivot 15 in the bottom of desktop main part 1, 14 below activities of fixed block, and the below swing joint of pivot 15 has electronic lift post 11, and the quantity of electronic lift post 11 is four, through the setting of electronic lift post 11, can change the inclination of desktop main part 1 to can cause certain difficulty to the experiment, make the experimental result more correct.
Specifically, when the electric lifting column 11 is lifted, the rotating shaft 15 can be moved, the angle of the electric lifting column 11 can be changed as long as the heights of the front and rear electric lifting columns 11 are different, and the electric lifting columns 11 are grouped into two.
The working principle and the using process thereof are as follows: the user can adjust electric lift post 11 earlier when carrying out the friction experiment, adjust desktop main part 1 into levelly and smoothly, then carry out the frictional force and realize, the user can successively carry out rough surface 2, mar face 3, the experiment of normal desktop 4 and smooth desktop 5, discover after the experiment at last that the speed of the removal of sliding block 6 above the rough surface 2 is slowest, the speed that sliding block 6 above smooth desktop 5 removed is the fastest, draw the conclusion at last, through the setting on different surfaces, just can draw the size of frictional force and the roughness of contact surface is relevant, the surface is more rough, the frictional force is big more, the surface is more smooth, the frictional force is little.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (6)
1. The utility model provides an experiment teaching aid for frictional force teaching, includes desktop main part (1), its characterized in that: the upper surface of desktop main part (1) is provided with rough surface (2), mar face (3), normal desktop (4) and smooth desktop (5), the top of rough surface (2) is provided with sliding block (6), the upper end fixed mounting of desktop main part (1) has stop plate (7), the front end of sliding block (6) is provided with connecting wire (8), the bottom of connecting wire (8) is connected with couple (10), the front end of desktop main part (1) is provided with rotating pulley (9), the below of desktop main part (1) is connected with electronic lift post (11), the surface mounting of smooth desktop (5) has smooth track (12), the front end fixedly connected with of smooth track (12) blocks piece (13), the under surface mounting of desktop main part (1) has fixed block (14), be provided with pivot (15) between fixed block (14) and electronic lift post (11).
2. An experiment teaching aid for friction teaching according to claim 1, wherein: rough surface (2), mar face (3), normal desktop (4) and smooth desktop (5) fixed mounting are at the upper surface of desktop main part (1), rough surface (2), mar face (3), and the size of normal desktop (4) and smooth desktop (5) is the same, the roughness of rough surface (2) is greater than the roughness of mar face (3), the roughness of mar face (3) is greater than the roughness of normal desktop (4), the roughness of normal desktop (4) is greater than the roughness of sliding block (6).
3. An experiment teaching aid for friction teaching according to claim 1, characterized in that: smooth track (12) fixed mounting is on the surface of smooth desktop (5), the surface of smooth track (12) is smooth, the quantity of smooth track (12) is two, the size of stopping piece (13) is greater than the size of smooth track (12), the quantity of stopping piece (13) is two.
4. An experiment teaching aid for friction teaching according to claim 1, wherein: the surface at desktop main part (1) is placed in sliding block (6), the quantity of sliding block (6) is four, stop plate (7) fixed mounting in the top of desktop main part (1), the quantity of stop plate (7) is a plurality of, desktop main part (1) has been divided into rough surface (2) by stop plate (7), mar face (3), four parts of normal desktop (4) and smooth desktop (5).
5. An experiment teaching aid for friction teaching according to claim 1, wherein: the one end and sliding block (6) fixed connection of connecting wire (8), the other end and couple (10) fixed connection of connecting wire (8), the quantity of connecting wire (8) is four, the quantity of rotating pulley (9) is four, the surface of rotating pulley (9) is smooth.
6. An experiment teaching aid for friction teaching according to claim 1, wherein: fixed block (14) fixed mounting has pivot (15) in the bottom of desktop main part (1), the below activity of fixed block (14), the below swing joint of pivot (15) has electronic lift post (11), the quantity of electronic lift post (11) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221780060.6U CN217955309U (en) | 2022-07-12 | 2022-07-12 | Experiment teaching aid for friction force teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221780060.6U CN217955309U (en) | 2022-07-12 | 2022-07-12 | Experiment teaching aid for friction force teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217955309U true CN217955309U (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221780060.6U Active CN217955309U (en) | 2022-07-12 | 2022-07-12 | Experiment teaching aid for friction force teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217955309U (en) |
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2022
- 2022-07-12 CN CN202221780060.6U patent/CN217955309U/en active Active
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