CN210052386U

CN210052386U - Teaching aid for flat throwing experiment

Info

Publication number: CN210052386U
Application number: CN201920323291.6U
Authority: CN
Inventors: 蒋串莲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-02-11
Anticipated expiration: 2029-03-14

Abstract

The utility model discloses a teaching aid for flat throwing experiment, which comprises a flat plate, flat plate position rectangle platelike structure, dull and stereotyped lateral wall welding has the riser, the welding of dull and stereotyped up end has the bounding wall, the welding of the one side that is close to the flat board of riser has four boards of placing, every the upper end of placing the board has all welded the connecting plate, every the one end that the connecting plate is close to the riser has all welded multiunit promotion spring, every group the promotion spring is kept away from the one end of corresponding connecting plate and has all welded the push pedal, every the push pedal is close to one side that corresponds the connecting plate and has all welded the ejector. In the device, a plurality of placing plates are arranged, the control on the initial speed of the experimental steel ball is realized by changing the distance pulled by the push plate 7, the influence of the initial speed and the height of the place on the horizontal projectile motion is verified by simultaneously carrying out comparison experiments on the placing plates with different heights, and the more intuitive understanding on the horizontal projectile motion is realized by controlling a variable method.

Description

Teaching aid for flat throwing experiment

Technical Field

The utility model relates to an experiment teaching aid technical field especially relates to a flat teaching aid for throwing experiments.

Background

Throwing the object at a certain initial speed in the horizontal direction, and if the object is only under the action of gravity, the movement is called horizontal throwing movement; the horizontal projectile motion can be regarded as the combined motion of uniform linear motion in the horizontal direction and free falling body motion in the vertical direction; the horizontal projectile motion is that the time of the curvilinear motion horizontal projectile motion is only related to the vertical height of the projectile point; the horizontal displacement of the object on the ground is related to the time and the horizontal initial speed; the direction of its speed change is always vertically downwards.

The horizontal projectile motion occupies a higher position in physics, is a necessary knowledge point, needs to be tested to strengthen the understanding of the horizontal projectile motion, is the existing experimental device, has the characteristic that the experimental result is not visual enough to show the horizontal projectile motion, and is not beneficial to the understanding of students and the teaching of teachers.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the prior art has the defect that the experimental result is not visual, and providing a teaching aid for horizontal projectile experiments.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a teaching aid for flat throw experiments, includes the flat board, flat board position rectangle platelike structure, dull and stereotyped lateral wall welding has the riser, the welding of dull and stereotyped up end has the bounding wall, the welding of one side that is close to the flat board of riser has four boards of placing, every the upper end of placing the board all welds the connecting plate, every the one end that the connecting plate is close to the riser has all welded the multiunit to promote the spring, every group promote the spring and keep away from the one end that corresponds the connecting plate and all weld the push pedal, every the push pedal is close to one side that corresponds the connecting plate and all welds ejector pin, every the ejector pin all runs through sliding connection with the lateral wall that corresponds the connecting plate.

Preferably, the linkage device comprises a linkage rod and an L-shaped linkage plate, the linkage rod is welded with one side, away from the vertical plate, of the corresponding push plate, the linkage plate is welded on the side wall of the corresponding push plate, the upper end face of the linkage plate is rotatably connected with a rotating plate through a pin shaft, the rotating plate is welded with a limiting spring together with the side wall of the linkage plate, a limiting block is welded on the side wall of the rotating plate, and a dropping hole is formed in the upper end face of the linkage plate.

Preferably, a measuring scale is glued to the upper end of each placing plate, a positioning block is welded to one end, far away from the vertical plate, of each placing plate, and the positioning blocks are of cylindrical plate-shaped structures with sunken upper ends.

Preferably, the three placing plates without the linkage device are positioned in the same vertical plane, the upper end of the flat plate is glued with a sliding rail, and the sliding rail is made of toughened glass materials.

Preferably, the linkage rod and the corresponding top rod are the same in length, and the center of the positioning block and the center of the rotating plate are located in the same vertical plane.

Preferably, the limiting block is of a crescent plate-shaped structure, the limiting block is connected with the upper end face of the linkage plate in a sliding mode, and the limiting block is located above the falling hole.

Compared with the prior art, the utility model has the advantages of:

1. in the device, a plurality of placing plates are arranged, the control on the initial speed of the experimental steel ball is realized by changing the distance pulled by the push plate 7, the influence of the initial speed and the height of the place on the horizontal projectile motion is verified by simultaneously carrying out comparison experiments on the placing plates with different heights, and the more intuitive understanding on the horizontal projectile motion is realized by controlling a variable method.

2. In the device, through the design of a linkage device, two experimental steel balls can move simultaneously by pulling a push plate once, one of the two steel balls performs horizontal projectile motion, the other steel ball performs free falling motion, and then the motion form of the vertical direction of the horizontal projectile motion can be verified to be free falling motion.

Drawings

Fig. 1 is the utility model provides a structural schematic diagram of teaching aid for horizontal projectile experiments.

Fig. 2 is the utility model provides a top view of teaching aid for flat throw experiments.

Fig. 3 is a sectional view taken along the direction a in fig. 2.

In the figure: the device comprises a flat plate 1, a vertical plate 2, a coaming 3, a placing plate 4, a connecting plate 5, a pushing spring 6, a pushing plate 7, an ejector rod 8, a measuring scale 9, a positioning block 10, a sliding rail 11, a linkage rod 12, a linkage plate 13, a rotating plate 14, a limiting spring 15, a limiting block 16 and a dropping hole 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.

Referring to fig. 1-3, a teaching aid for flat throw experiments, including dull and stereotyped 1, dull and stereotyped 1 position rectangle platelike structure, the welding of dull and stereotyped 1's lateral wall has riser 2, the welding of dull and stereotyped 1's up end has bounding wall 3, the welding of riser 2 is close to one side of dull and stereotyped 1 has four to place board 4, every upper end of placing board 4 has all welded connecting plate 5, the one end that every connecting plate 5 is close to riser 2 has all welded multiunit promotion spring 6, the one end that every group promotion spring 6 kept away from corresponding connecting plate 5 has all welded push pedal 7, every push pedal 7 is close to one side that corresponds connecting plate 5 has all welded ejector pin 8, every ejector pin 8 all runs through sliding connection with the lateral wall that corresponds connecting.

The linkage device comprises a linkage rod 12 and an L-shaped linkage plate 13, the linkage rod 12 and one side, far away from the vertical plate 2, of the corresponding push plate 7 are welded, the linkage plate 13 is welded on the side wall of the corresponding push plate 7, the upper end face of the linkage plate 13 is rotatably connected with a rotating plate 14 through a pin shaft, the rotating plate 14 and the side wall of the linkage plate 13 are welded together with a limiting spring 15, a limiting block 16 is welded on the side wall of the rotating plate 14, and a dropping hole 17 is formed in the upper end face of the linkage plate 13.

A measuring scale 9 is glued at the upper end of each placing plate 4, a positioning block 10 is welded at one end of each placing plate 4, which is far away from the vertical plate 2, and the positioning blocks 10 are all of cylindrical plate-shaped structures with sunken upper ends; the three placing plates 4 without the linkage device are positioned in the same vertical plane, one of the placing plates 4 is abutted against the upper end face of the flat plate 1, the other placing plate 4 is as high as the placing plate 4 with the linkage device, and the other placing plate is positioned between the two placing plates.

The upper end of the flat plate 1 is glued with a slide rail 11, and the slide rail 11 is made of toughened glass material; the length of the linkage rod 12 is the same as that of the corresponding ejector rod 8, and the center of the positioning block 10 and the center of the rotating plate 14 are positioned in the same vertical plane; the limiting block 16 is of a crescent plate-shaped structure, the limiting block 16 is connected with the upper end face of the linkage plate 13 in a sliding mode, and the limiting block 16 is located above the falling hole 17.

When a flat throw experiment needs to be carried out, a steel ball for the experiment can be placed on the positioning block 10, then the push plate 7 is pulled to a certain scale on the measuring scale 9, the push plate 7 is loosened, the push plate 7 can rapidly move towards the direction of the connecting plate 5 under the elastic force action of the push spring 6 and drives the ejector rod 8 to move along with the push plate, under the inertia action, after the push spring 6 is contracted to an initial state, the push plate 7 can extrude the push spring 6 to continuously move, so that the ejector rod 8 can continuously move forwards under the driving of the ejector rod 8, and can collide with the steel ball after the ejector rod 8 is in contact with the steel ball for the experiment.

Place the experiment steel ball on the locating piece 10 of two boards 4 of placing of same height, stimulate two push pedal 7 to the different positions of measuring tape, because the tensile degree that promotes spring 6 of push pedal 7 is different, make the elasticity size of promoting spring 6 to push pedal 7 also different, make the kinetic energy that motion of push pedal 7 produced behind the release hand different, make ejector pin 8 have bigger kinetic energy, the kinetic energy that ejector pin 8 transmitted for the experiment steel ball is different, and then the realization is to the change of experiment steel ball initial velocity, and then the influence of audio-visual observation experiment steel ball initial velocity to steel ball flat throw motion.

The steel balls are placed on the positioning blocks 10 of the two placing plates 4 with different heights, then the push plates 7 are pulled to the same scale of the measuring scale, the initial speed of the experimental steel balls is guaranteed to be the same, the influence of the height on the experimental result in the horizontal projectile motion can be visually known, the steel balls can be placed on the placing plates 4 at the high positions and the placing plates 4 on the upper end face of the flat plate 1 at the same time, then the two push plates 7 are pulled to the same scale, the initial speed is guaranteed to be consistent, the sliding rails 11 are made of toughened glass, the friction force between the steel balls and the sliding rails 11 is small, the influence on the experiment can be ignored, the law can be verified through comparison, the law of the horizontal projectile motion in the uniform-speed linear motion can be verified, due to the existence of the law, the two experimental steel balls can collide with each other on the sliding rails 11, the verification result of.

The experimental steel balls can be placed at the positions of the positioning block 10 and the falling hole 17 of the placing plate 4 provided with the linkage device, the experimental steel balls cannot penetrate through the falling hole 17 due to the blocking of the limiting block 16, but are positioned on the upper surface of the linkage plate 13, at the moment, the two steel balls are basically positioned at the same height, a slight height difference can be leveled by a plurality of tests and experimental errors, the push plate 7 is pulled and then loosened, the push plate 7 is driven to drive the ejector rod 8 and the linkage rod 12 to move, when the ejector rod 8 moves to collide with the steel balls, the linkage rod 12 moves to be in a state of abutting against the rotating plate 14, when the ejector rod 8 collides with the steel balls, the linkage rod 12 collides with the rotating plate 14, the limiting spring 15 is extruded and rotates, the limiting block 16 can not block the steel balls any more, the steel balls can make free falling body movement at one moment, and the free falling body movement of the flat throwing movement in the vertical direction can be verified, the experimental result is also very visual, and the teaching is convenient.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A teaching aid for a flat throw experiment comprises a flat plate (1) and is characterized in that the flat plate (1) is of a rectangular plate-shaped structure, a vertical plate (2) is welded on the side wall of the flat plate (1), a surrounding plate (3) is welded on the upper end face of the flat plate (1), four placing plates (4) are welded on one side, close to the flat plate (1), of the vertical plate (2), a connecting plate (5) is welded on the upper end of each placing plate (4), a plurality of groups of pushing springs (6) are welded on one end, close to the vertical plate (2), of each connecting plate (5), a push plate (7) is welded on one end, far away from the corresponding connecting plate (5), of each pushing spring (6), a push rod (8) is welded on one side, close to the corresponding connecting plate (5), of each push plate (7) is connected with the side wall of the corresponding connecting plate (, the side wall of one of the placing plates (4) is provided with a linkage device.

2. The teaching aid for the flat throw experiment of claim 1, characterized in that, aggregate unit includes gangbar (12) and the linkage board (13) of "L" shape, one side that riser (2) were kept away from with corresponding push pedal (7) in linkage bar (12) welds mutually, the lateral wall at corresponding push pedal (7) is welded in linkage board (13), the up end of linkage board (13) rotates through the round pin axle and is connected with commentaries on classics board (14), commentaries on classics board (14) have spacing spring (15) with the lateral wall of linkage board (13) common welding, the lateral wall welding of commentaries on classics board (14) has stopper (16), the up end of linkage board (13) has been seted up and has fallen hole (17).

3. The teaching aid for the flat projectile experiment of claim 2, wherein the upper end of each placing plate (4) is glued with a measuring scale (9), one end of each placing plate (4) far away from the vertical plate (2) is welded with a positioning block (10), and the positioning blocks (10) are all cylindrical plate-shaped structures with concave upper ends.

4. The teaching aid for the flat projectile experiment of claim 1, wherein three placing plates (4) without the linkage are located in the same vertical plane, the upper end of the flat plate (1) is glued with a sliding rail (11), and the sliding rail (11) is made of toughened glass material.

5. A teaching aid for a flat projectile experiment as claimed in claim 3, wherein the linkage rod (12) is the same length as the corresponding ejector rod (8), and the center of the positioning block (10) and the center of the rotating plate (14) are in the same vertical plane.

6. The teaching aid for the flat throw experiment of claim 2, characterized in that the limiting block (16) is of a crescent plate-shaped structure, the limiting block (16) is in sliding connection with the upper end face of the linkage plate (13), and the limiting block (16) is located above the dropping hole (17).