CN112767795A - Lever physical experiment demonstration device - Google Patents
Lever physical experiment demonstration device Download PDFInfo
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- CN112767795A CN112767795A CN201911062834.4A CN201911062834A CN112767795A CN 112767795 A CN112767795 A CN 112767795A CN 201911062834 A CN201911062834 A CN 201911062834A CN 112767795 A CN112767795 A CN 112767795A
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- lever
- electric telescopic
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- telescopic rod
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a lever physical experiment demonstration device, which comprises a device body, wherein the top end of the device body is provided with a workbench, the top of the workbench is provided with a plurality of lever experiment devices, one side of each lever experiment device is provided with a drawing board, the bottom end of the drawing board is fixedly provided with a first electric telescopic rod, the bottom end of each lever experiment device is provided with a first movable groove, one end of each first movable groove is fixedly provided with a second electric telescopic rod, the lever physical experiment demonstration device can be used for performing lever experiments with the same fulcrum position and different heights, can be used for performing lever experiments with the same fulcrum position and different fulcrum positions, can be used for rapidly adjusting the positions of the fulcrums, can be used for automatically adjusting the heights of the levers, can be used for recording experiment results, can be used for performing comparison experiments, can show each group of experiment results and ensure that the lever experiments are more standard, the interest of students in learning physics is improved, and the students can also be helped to understand the lever principle.
Description
Technical Field
The invention relates to the field of physical experiments, in particular to a lever physical experiment demonstration device.
Background
Often need do the physical experiment in physical teaching, and the physical experiment divide into many kinds, especially involve the physical experiment of lever, Archimedes says that I can prize the earth for a lever, very abstract to this sentence, can not go the demonstration through the physical experiment, let the student understand the principle of lever more, and many mr all adopt a pole to look for a fulcrum to rehearse, the rigidness is not enough, and the experiment is not normal, influence student understanding and study, even there is the experiment presentation device in many schools, but mostly all adopt a lever and a fulcrum to operate, do not have the contrast experiment, also can not record the experiment result.
Disclosure of Invention
The invention aims to provide a lever physical experiment demonstration device aiming at the defects of the prior art so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a lever physical experiment demonstration device comprises a device body, wherein a workbench is arranged at the top end of the device body, a plurality of lever experiment devices are arranged at the top of the workbench, a drawing board is arranged on one side of each lever experiment device, a first electric telescopic rod is fixed at the bottom end of the drawing board, a first movable groove is arranged at the bottom end of each lever experiment device, a second electric telescopic rod is fixed at one end of the first movable groove, a first movable block is fixed at one end of the second electric telescopic rod, a third electric telescopic rod is installed at the top end of the first movable block, a fixed block clamping sleeve is installed at the top end of the third electric telescopic rod, a fixed block is fixed on the fixed block clamping sleeve, a second movable block is welded at the top of the fixed block, threaded rods are connected to two sides of the second movable block, and the second movable block is movably connected with a second movable groove at the bottom of a lever, threaded rod movable slots are formed in the two sides of the second movable slot, a first weight box is fixed to one end of the lever, and a second weight box is fixed to the other end of the lever.
As a preferred technical scheme of the invention, supporting legs are welded at four corners of the bottom end of the workbench, a power switch is mounted at one end of the workbench, and the power switch is electrically connected with the first electric telescopic rod, the second electric telescopic rod and the third electric telescopic rod respectively.
As a preferable technical solution of the present invention, the second electric telescopic rod is fixed in a first movable groove on the workbench through a bolt, and the first movable block is fixedly connected to the second electric telescopic rod and the third electric telescopic rod through bolts.
As a preferred technical scheme of the present invention, the fixed block sleeve is welded to the third electric telescopic rod, the fixed block sleeve is fixedly connected to the fixed block sleeve through a rotating shaft, and the second movable block is fixed to the second movable groove through a threaded rod.
According to a preferable technical scheme of the invention, the first weight box and the second weight box are both connected with the lever in a welded mode, the first electric telescopic rod is fixed on the bottom of the workbench, and the drawing board is fixedly connected with the first electric telescopic rod through bolts.
The invention has the beneficial effects that: this lever physics experiment presentation device can do the lever experiment of the same fulcrum position of co-altitude not, can do the lever experiment of the same different fulcrum positions of co-altitude, can also do the lever experiment of the different fulcrum positions of co-altitude, can the position of quick adjustment fulcrum, height that can the automatically regulated lever, can take notes the experimental result, can do contrast experiment, can show every group experimental result, let the lever experiment more normal, improve the student and to the interest of study physics, also can help the student to understand the lever principle.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the lever experimental apparatus of the present invention;
FIG. 3 is a schematic bottom structure diagram of the lever experimental apparatus of the present invention;
FIG. 4 is a schematic structural diagram of the lever drawing board of the present invention;
in the figure: 1. the device body, 2, the workstation, 3, the supporting leg, 4, the lever experimental apparatus, 5, switch, 6, the drawing board, 7, first electric telescopic handle, 8, first activity groove, 9, first movable block, 10, second electric telescopic handle, 11, third electric telescopic handle, 12, the lever, 13, first weight box, 14, second weight box, 15, the threaded rod activity groove, 16, the second movable block, 17, the threaded rod, 18, the fixed block, 19, the fixed block cutting ferrule, 20, the second activity groove.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
Example (b): referring to fig. 1-4, the present invention provides a technical solution: a lever physical experiment demonstration device comprises a device body 1, a workbench 2 is arranged at the top end of the device body 1, a plurality of lever experiment devices 4 are arranged at the top end of the workbench 2, a drawing board 6 is arranged at one side of each lever experiment device 4, a first electric telescopic rod 7 is fixed at the bottom end of each drawing board 6, a first movable groove 8 is arranged at the bottom end of each lever experiment device 4, a second electric telescopic rod 10 is fixed at one end of each first movable groove 8, a first movable block 9 is fixed at one end of each second electric telescopic rod 10, a third electric telescopic rod 11 is installed at the top end of each first movable block 9, a fixed block clamping sleeve 19 is installed at the top end of each third electric telescopic rod 11, a fixed block 18 is fixed on each fixed block clamping sleeve 19, a second movable block 16 is welded at the top of the fixed block 18, threaded rods 17 are connected to two sides of the second movable block 16, the second movable block 16 is movably connected with a second, threaded rod movable grooves 15 are formed in two sides of the second movable groove 20, a first weight box 13 is fixed to one end of the lever 12, and a second weight box 14 is fixed to the other end of the lever.
Supporting legs 3 are welded at four corners of the bottom end of the workbench 2, a power switch 5 is installed at one end of the workbench 2, the power switch 5 is respectively electrically connected with the first electric telescopic rod 7, the second electric telescopic rod 10 and the third electric telescopic rod 11, and a power supply of the first electric telescopic rod 7, the second electric telescopic rod 10 and the third electric telescopic rod 11 is switched on through the power switch 5.
In second electric telescopic handle 10 passed through the first movable groove 8 of bolt fastening on workstation 2, first movable block 9 passes through the bolt fastening with second electric telescopic handle 10 and third electric telescopic handle 11 and links to each other, can adjust the position of fulcrum through second electric telescopic handle 10, adjusts the height of lever 12 through third electric telescopic handle 11.
Fixed block cutting ferrule 19 links to each other with the welding of third electric telescopic handle 11, and fixed block 18 links to each other through the pivot is fixed with fixed block cutting ferrule 19, and second movable block 16 passes through threaded rod 17 to be fixed at second movable groove 20, and fixed block 18 is rotatory around the pivot with fixed block cutting ferrule 19, fixes second movable block 16 on second movable groove 20 through rotatory threaded rod 17.
The working principle is as follows: a lever physical experiment demonstration device is provided with three groups of lever experiment devices 4, when lever experiments with different heights and the same pivot point are carried out, a power switch 5 is used for opening a power switch of a third electric telescopic rod 11 in each group of lever experiment devices 4, the third electric telescopic rod 11 is used for lifting each group of levers 12 to different heights, then 100 g of weights are placed on a second weight box 14, 5 weights of 20 g and one weight of 5 g are sequentially placed into a first weight box 13, and the motion condition of the levers 12 is observed; when a lever experiment with different heights and different fulcrums is performed, the lever 12 is held by a hand by loosening the threaded rod 17, the power switch of the second electric telescopic rod 10 is turned on, the second electric telescopic rod 10 pushes the first movable block 9 to move in the first movable groove 8, the second movable block 16 moves in the second movable groove 20 and moves to a proper position, the second movable block 16 is fixed in the second movable groove 20 by rotating the threaded rod 17, then 100 grams of weights are placed on the second weight box 14, 5 weights of 20 grams and one weight of 5 grams are sequentially placed into the first weight box 13, and the motion condition of the lever 12 is observed; when a lever experiment with the same height and different supporting points is carried out, each group of levers 12 is adjusted to the same height through the third electric telescopic rod 11, then 100 g of weights are placed on the second weight box 14, 5 weights of 20 g and one weight of 5 g are sequentially placed into the first weight box 13, and the motion condition of the levers 12 is observed; can also rise drawing board 6 to suitable height through first electric telescopic handle 7, can draw down lever 12's state, let the result show of every group lever experimental apparatus 4 on drawing board 6, be convenient for compare.
This lever physics experiment presentation device can do the lever experiment of the same fulcrum position of co-altitude not, can do the lever experiment of the same different fulcrum positions of co-altitude, can also do the lever experiment of the different fulcrum positions of co-altitude, can the position of quick adjustment fulcrum, height that can the automatically regulated lever, can take notes the experimental result, can do contrast experiment, can show every group experimental result, let the lever experiment more normal, improve the student and to the interest of study physics, also can help the student to understand the lever principle.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. The utility model provides a lever physics experiment presentation device, includes device body (1), its characterized in that: the device is characterized in that a workbench (2) is arranged at the top of the device body (1), a plurality of lever experiment devices (4) are arranged at the top of the workbench (2), a drawing board (6) is arranged on one side of each lever experiment device (4), a first electric telescopic rod (7) is fixed at the bottom end of each drawing board (6), a first movable groove (8) is arranged at the bottom end of each lever experiment device (4), a second electric telescopic rod (10) is fixed at one end of each first movable groove (8), a first movable block (9) is fixed at one end of each second electric telescopic rod (10), a third electric telescopic rod (11) is installed at the top end of each first movable block (9), a fixed block clamping sleeve (19) is installed at the top end of each third electric telescopic rod (11), a fixed block clamping sleeve (18) is fixed on each fixed block (19), and a second movable block (16) is welded at the top of each fixed block (18), the both sides of second movable block (16) all are connected with threaded rod (17), second movable block (16) link to each other with second activity groove (20) activity of lever (12) bottom, the both sides of second activity groove (20) all are equipped with threaded rod activity groove (15), the one end of lever (12) is fixed with first weight box (13), and the other end is fixed with second weight box (14).
2. The lever physical experiment demonstration device of claim 1, wherein: supporting legs (3) are welded at four corners of the bottom end of the workbench (2), one end of the workbench (2) is provided with a power switch (5), and the power switch (5) is respectively electrically connected with the first electric telescopic rod (7), the second electric telescopic rod (10) and the third electric telescopic rod (11).
3. The lever physical experiment demonstration device of claim 1, wherein: the second electric telescopic rod (10) is fixed in a first movable groove (8) on the workbench (2) through bolts, and the first movable block (9) is fixedly connected with the second electric telescopic rod (10) and the third electric telescopic rod (11) through bolts.
4. The lever physical experiment demonstration device of claim 1, wherein: fixed block cutting ferrule (19) and third electric telescopic handle (11) welding link to each other, fixed block (18) and fixed block cutting ferrule (19) are fixed continuous through the pivot, second movable block (16) are fixed on second activity groove (20) through threaded rod (17).
5. The lever physical experiment demonstration device of claim 1, wherein: first weight box (13) and second weight box (14) all link to each other with lever (12) welding, first electric telescopic handle (7) are fixed on the bottom of workstation (2), drawing board (6) link to each other through bolt fastening with first electric telescopic handle (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911062834.4A CN112767795A (en) | 2019-11-04 | 2019-11-04 | Lever physical experiment demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911062834.4A CN112767795A (en) | 2019-11-04 | 2019-11-04 | Lever physical experiment demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112767795A true CN112767795A (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911062834.4A Pending CN112767795A (en) | 2019-11-04 | 2019-11-04 | Lever physical experiment demonstration device |
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| Country | Link |
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| CN (1) | CN112767795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117475702A (en) * | 2023-12-27 | 2024-01-30 | 深圳市新风向科技股份有限公司 | Auxiliary teaching device for network teaching |
-
2019
- 2019-11-04 CN CN201911062834.4A patent/CN112767795A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117475702A (en) * | 2023-12-27 | 2024-01-30 | 深圳市新风向科技股份有限公司 | Auxiliary teaching device for network teaching |
| CN117475702B (en) * | 2023-12-27 | 2024-03-08 | 深圳市新风向科技股份有限公司 | Auxiliary teaching device for network teaching |
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