CN220041251U - Friction force demonstration teaching aid - Google Patents
Friction force demonstration teaching aid Download PDFInfo
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- CN220041251U CN220041251U CN202321681775.0U CN202321681775U CN220041251U CN 220041251 U CN220041251 U CN 220041251U CN 202321681775 U CN202321681775 U CN 202321681775U CN 220041251 U CN220041251 U CN 220041251U
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- friction force
- teaching aid
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- 238000012360 testing method Methods 0.000 claims abstract description 84
- 230000003068 static effect Effects 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a friction demonstration teaching aid which comprises a support base, wherein fixing screws are arranged at the front part of the upper end of the support base and at the rear part of the upper end of the support base, a fixing frame body is arranged at the lower ends of the two fixing screws together, fixing devices are arranged at the front part of the lower end of the fixing frame body and at the rear part of the lower end of the fixing frame body together, a sliding friction demonstration device is arranged at the left part of the upper end of the support base, and three static friction testing devices are arranged at the right part of the upper end of the support base. According to the friction demonstration teaching aid, the hooks on the spring scales are connected with the pull rings, at the moment, the spring scales are pulled at a constant speed, so that the friction blocks slide on the test seats to further test the static friction force of an object, meanwhile, the friction coefficients of the upper surfaces of the three test seats are different, the friction blocks are convenient to compare with the static friction force of the friction blocks on different test seats, the device is fixed on a tabletop through the fixing device, the device is prevented from shaking and shifting easily during testing, and therefore the demonstration effect and quality are improved.
Description
Technical Field
The utility model relates to the technical field of friction force teaching demonstration, in particular to a friction force demonstration teaching aid.
Background
Two objects in contact with each other are resilient and when they undergo or tend to undergo relative movement, a force is created on the contact surface that resists relative movement, known as friction. Friction is a difficulty in middle school physics, and because the direction of friction force is easily determined by subjective imagination and is easy to make mistakes, a friction force demonstration device is needed to demonstrate the friction force for better understanding of students.
The utility model provides a friction force presentation device of current patent (application number 201811127375.9), includes the bottom plate, be equipped with the slide on the bottom plate, the slide slope sets up, be equipped with many slides on the slide, the slide all sets up along slide length direction, the slide upper berth is equipped with the non-uniform slide pad of coefficient of friction. The device can realize the demonstration to frictional force according to different coefficient of friction, and overall structure is simple simultaneously, and the demonstration is effectual, has guaranteed the quality of having lessons.
The slide pad with inconsistent friction coefficient is paved on the slide way to realize demonstration of friction force, but the slide pad can only demonstrate the sliding friction force of an object, and the friction force of the object when standing is not well tested, so that the device has certain limitation when in use; in addition, the device is when carrying out the test, and the bottom plate does not have fine fixed, and then rock the skew easily when the test, influences effect and the quality of demonstration.
Disclosure of Invention
The utility model mainly aims to provide a friction force demonstration teaching aid which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a frictional force demonstration teaching aid, includes the support base, support base upper end front portion and upper end rear portion all install the fixed screw, two the fixed frame body is installed jointly to the fixed screw lower extreme, fixing device is installed jointly to fixed frame body lower extreme front portion and lower extreme rear portion, sliding friction force presentation device is installed in support base upper end left part, three stiction testing arrangement is installed on support base upper end right part.
Preferably, the sliding friction force demonstration device comprises a test plate, three test pads are arranged at the upper end of the test plate, three clamping columns are arranged at the left part of the lower end of the test plate, three first clamping grooves are formed in the left part of the upper end of the support base, second clamping grooves are formed in the middle of the upper end of the support base, and the test plate is arranged at the left part of the upper end of the support base through the clamping columns. The test pads are provided with a plurality of weights, friction coefficients on the test pads are different, so that when the weights slide up and down, the speeds are different, and the sliding friction force of the weights is demonstrated.
Preferably, the static friction force testing device comprises a supporting seat and a friction block, wherein the front end of the supporting seat is provided with a sliding groove, the lower end of the supporting seat is provided with a testing seat, the middle part of the right end of the friction block is provided with a pull ring, the rear end of the friction block is provided with a sliding block, the friction block is arranged at the front end of the supporting seat through the sliding block, and the supporting seat is arranged at the right part of the upper end of the supporting seat. The hook on the spring balance is connected with the pull ring, at the moment, the spring balance is pulled at a constant speed, so that the pull ring drives the friction block to slide on the test seat, further the static friction force of an object is tested, meanwhile, the friction coefficients of the upper surfaces of the test seats on the three static friction force testing devices are different, and the static friction force of the friction block on different test seats is convenient to compare.
Preferably, the fixing device comprises two knobs, the two knobs are provided with threaded columns at the upper ends of the two knobs, the upper ends of the threaded columns are provided with anti-slip blocks, and the two knobs are respectively arranged at the front part and the rear part of the lower end of the fixing frame body through the threaded columns. The knob drives the threaded column to ascend, so that the anti-skid block on the threaded column is clung to the lower part of the table, and the device is fixed on the table top, so that the device is prevented from easily shaking and shifting during testing.
Preferably, the three test pads are equidistantly distributed on the test board from front to back, and the friction coefficients of the upper surfaces of the three test pads are different.
Preferably, the sliding block corresponds to the sliding groove in left and right directions, and the sliding block is T-shaped.
Compared with the prior art, the utility model has the following beneficial effects:
the test pad is arranged on the test pad on the test board on the sliding friction force demonstration device, the test pad is provided with a plurality of test pads, the friction coefficients on the test pads are all different, and then when a plurality of weights slide up and down, the speed is different, and further the sliding friction force of the test pads is demonstrated, meanwhile, the hooks on the spring balance are connected with the pull rings on the static friction force test device, at the moment, the spring balance is pulled at a constant speed, the pull rings drive the friction blocks to slide on the test seats, further the static friction force of an object is tested, meanwhile, the friction coefficients on the upper surfaces of the test seats on the three static friction force test devices are all different, the static friction force comparison of the friction blocks on different test seats is facilitated, and the demonstration effect of the device is further improved.
Through rotating the knob on the fixing device, the knob drives the screw thread post to rise, and then makes the non slipping block on it hug closely with the desk lower part, and then fixes the device on the desktop, avoids shaking the skew easily at the test time device, and then has improved the effect and the quality of demonstration, in addition, can make things convenient for the dismantlement of mount body through not hard up fixed screw, and the test board is by card post joint on supporting the base moreover, and then makes things convenient for the installation and the dismantlement of test board, and then makes the convenient for split of device carry.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a friction force demonstration teaching aid of the present utility model;
fig. 2 is a schematic diagram of the overall structure of a sliding friction force testing device of a friction force demonstration teaching aid according to the present utility model;
FIG. 3 is a schematic diagram of the overall structure of a static friction force testing device of a friction force demonstration teaching aid of the utility model;
fig. 4 is a schematic diagram of the whole structure of a fixing device of a friction force demonstration teaching aid.
In the figure: 1. a support base; 2. a sliding friction force demonstration device; 3. a static friction force testing device; 4. a fixing device; 5. a set screw; 6. a fixing frame body; 20. a test board; 21. a test pad; 22. a clamping column; 23. a first clamping groove; 24. a second clamping groove; 30. a support base; 31. a friction block; 32. a test seat; 33. a pull ring; 34. a slide block; 35. a chute; 40. a knob; 41. a threaded column; 42. an anti-skid block.
Description of the embodiments
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-4, a friction force demonstration teaching aid comprises a support base 1, wherein fixing screws 5 are respectively arranged at the front part of the upper end and the rear part of the upper end of the support base 1, a fixing frame body 6 is jointly arranged at the lower ends of the two fixing screws 5, a fixing device 4 is jointly arranged at the front part of the lower end of the fixing frame body 6 and the rear part of the lower end, a sliding friction force demonstration device 2 is arranged at the left part of the upper end of the support base 1, and three static friction force testing devices 3 are arranged at the right part of the upper end of the support base 1.
The sliding friction force demonstration device 2 comprises a test board 20, wherein three test pads 21 are arranged at the upper end of the test board 20, three clamping columns 22 are arranged at the left part of the lower end of the test board 20, three first clamping grooves 23 are formed in the left part of the upper end of the support base 1, a second clamping groove 24 is formed in the middle of the upper end of the support base 1, and the test board 20 is arranged at the left part of the upper end of the support base 1 through the clamping columns 22; the three test pads 21 are equidistantly distributed on the test board 20 from front to back, and the friction coefficients of the upper surfaces of the three test pads 21 are different. The test pads 21 are provided with a plurality of weights, and friction coefficients on the weights are different, so that when the weights slide up and down, the speeds are different, and the sliding friction force of the weights is demonstrated.
The static friction force testing device 3 comprises a supporting seat 30 and a friction block 31, wherein a sliding groove 35 is formed in the front end of the supporting seat 30, a testing seat 32 is arranged at the lower end of the supporting seat 30, a pull ring 33 is arranged in the middle of the right end of the friction block 31, a sliding block 34 is arranged at the rear end of the friction block 31, the friction block 31 is arranged at the front end of the supporting seat 30 through the sliding block 34, and the supporting seat 30 is arranged at the right part of the upper end of the supporting base 1; the slide block 34 corresponds to the slide groove 35 in left and right positions, and is T-shaped. The hook on the spring balance is connected with the pull ring 33, at the moment, the spring balance is pulled at a constant speed, so that the pull ring 33 drives the friction block 31 to slide on the test seat 32, further the static friction force of an object is tested, meanwhile, the friction coefficients of the upper surfaces of the test seats 32 on the three static friction force testing devices 3 are different, and the static friction force of the friction block 31 on different test seats 32 is conveniently compared.
The fixing device 4 comprises two knobs 40, the two knobs 40 are provided with threaded columns 41 at the upper ends of the two knobs 40, anti-slip blocks 42 are arranged at the upper ends of the two threaded columns 41, and the two knobs 40 are respectively arranged at the front part of the lower end and the rear part of the lower end of the fixing frame body 6 through the threaded columns 41. The knob 40 drives the threaded column 41 to ascend, so that the anti-skid block 42 on the threaded column is clung to the lower part of the table, and the device is fixed on the table top, so that the device is prevented from easily shaking and shifting during testing.
It should be noted that, the friction force demonstration teaching aid is provided by rotating the knob 40 on the fixing device 4, the knob 40 drives the threaded column 41 to rise, so that the anti-skid block 42 on the knob 40 is tightly attached to the lower part of the table, the device is fixed on the table top, the device is prevented from easily shaking and shifting during testing, the demonstration effect and quality are improved, then the tested weights are placed on the test pad 21 on the test plate 20 on the sliding friction force demonstration device 2, the test pad 21 is provided with a plurality of friction coefficients, the friction coefficients on the test pad are different, the speeds are different when the weights slide up and down, the sliding friction force of the weights is demonstrated, the hooks on the spring balance are connected with the pull ring 33 on the static friction force test device 3, at the same time, the spring balance is pulled at a constant speed, the pull ring 33 drives the friction block 31 to slide on the test seat 32, the static friction force of the object is tested, meanwhile, the friction coefficients on the upper surfaces of the test seats 32 on the three friction force test devices 3 are different, and the friction force contrast effect of the friction force demonstration device is further improved.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a frictional force demonstration teaching aid, includes support base (1), its characterized in that: the fixed screw (5) are installed at the front portion of the upper end of the support base (1) and the rear portion of the upper end, the fixed frame body (6) is installed at the lower end of the fixed screw (5) jointly, the fixing device (4) is installed at the front portion of the lower end of the fixed frame body (6) and the rear portion of the lower end jointly, the sliding friction force demonstration device (2) is installed at the left portion of the upper end of the support base (1), and three static friction force testing devices (3) are installed at the right portion of the upper end of the support base (1).
2. A friction demonstration teaching aid according to claim 1 and characterized in that: the sliding friction force demonstration device (2) comprises a test plate (20), three test pads (21) are arranged at the upper end of the test plate (20), three clamping columns (22) are arranged at the left part of the lower end of the test plate (20), three first clamping grooves (23) are formed in the left part of the upper end of the support base (1), second clamping grooves (24) are formed in the middle of the upper end of the support base (1), and the test plate (20) is arranged at the left part of the upper end of the support base (1) through the clamping columns (22).
3. A friction demonstration teaching aid according to claim 1 and characterized in that: the static friction force testing device (3) comprises a supporting seat (30) and a friction block (31), a sliding groove (35) is formed in the front end of the supporting seat (30), a testing seat (32) is arranged at the lower end of the supporting seat (30), a pull ring (33) is arranged in the middle of the right end of the friction block (31), a sliding block (34) is arranged at the rear end of the friction block (31), the friction block (31) is arranged at the front end of the supporting seat (30) through the sliding block (34), and the supporting seat (30) is arranged at the right part of the upper end of the supporting base (1).
4. A friction demonstration teaching aid according to claim 1 and characterized in that: the fixing device (4) comprises two knobs (40), wherein the two knobs (40) are provided with threaded columns (41) at the upper ends of the two knobs (40), anti-slip blocks (42) are arranged at the upper ends of the two threaded columns (41), and the two knobs (40) are respectively arranged at the front part and the rear part of the lower end of the fixing frame body (6) through the threaded columns (41).
5. A friction demonstration teaching aid according to claim 2 and characterized in that: the three test pads (21) are equidistantly distributed on the test board (20) from front to back, and the friction coefficients of the upper surfaces of the three test pads (21) are different.
6. A friction demonstration teaching aid according to claim 3 and characterized in that: the sliding blocks (34) are corresponding to the sliding grooves (35) in left and right positions, and the sliding blocks are T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321681775.0U CN220041251U (en) | 2023-06-29 | 2023-06-29 | Friction force demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321681775.0U CN220041251U (en) | 2023-06-29 | 2023-06-29 | Friction force demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220041251U true CN220041251U (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321681775.0U Active CN220041251U (en) | 2023-06-29 | 2023-06-29 | Friction force demonstration teaching aid |
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| Country | Link |
|---|---|
| CN (1) | CN220041251U (en) |
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2023
- 2023-06-29 CN CN202321681775.0U patent/CN220041251U/en active Active
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