CN211181329U

CN211181329U - Physical experiment demonstration vehicle and experiment demonstration device

Info

Publication number: CN211181329U
Application number: CN201920961438.4U
Authority: CN
Inventors: 胡佳贝; 赵福
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-08-04
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a physical experiment demonstration vehicle and an experiment demonstration device, wherein, the physical experiment demonstration vehicle comprises a vehicle body, a support frame, a clamp and a remote controller, the support frame is connected with the vehicle body and extends along the height direction of the vehicle body; the clamp is connected with one end of the support frame, which is far away from the vehicle body, and is used for clamping a heavy object block; the remote controller is electrically connected with the clamp to control the clamp to open and close. The utility model discloses technical scheme can reduce the experiment data error.

Description

Physical experiment demonstration vehicle and experiment demonstration device

Technical Field

The utility model relates to a teaching demonstration equipment field, in particular to physics experiment demonstration car and experiment presentation device.

Background

In the middle school physical kinematics experiment, the traditional experiment system usually utilizes a dotting timer to cooperate with a rail car to collect displacement data. However, the dot timer is a timing instrument which displays dots by printing ink dots on a paper tape, and friction exists between the paper tape and the dot timer, so that the dots on the paper tape are easily distributed unevenly, and the error of experimental data is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a physics experiment demonstration car aims at reducing the experiment data error.

In order to achieve the above object, the utility model provides a physical experiment demonstration car, include:

a vehicle body;

the supporting frame is connected with the vehicle body and extends along the height direction of the vehicle body;

the clamp is connected with one end of the support frame, which is far away from the vehicle body, and is used for clamping the heavy object block; and the number of the first and second groups,

and the remote controller is electrically connected with the clamp to control the clamp to open and close.

Optionally, anchor clamps are the electro-magnet, the electro-magnet orientation the automobile body sets up, physics experiment demonstration car still includes heavy object piece, heavy object piece is the ferromagnetic nature heavy object piece.

Optionally, the physical experiment demonstration vehicle comprises two support frames, two fixtures and two heavy objects, the two support frames are provided with the fixtures, and the remote controller is electrically connected with the two fixtures; alternatively, the first and second electrodes may be,

the physical experiment demonstration vehicle comprises two clamps and two heavy object blocks, the two clamps are connected with the support frame, and the remote controller is electrically connected with the two clamps.

Optionally, the support frame includes first support body and second support body, first support body is fixed in on the automobile body, anchor clamps install in the second support body, the second support body is followed the extending direction of support frame with first support body swing joint.

Optionally, the first frame body is tubular, the second frame body is rod-shaped, and the second frame body extends into the first frame body and is connected with the first frame body in a sliding manner;

the support frame further comprises a limiting screw, a threaded hole is formed in the first frame body, the limiting screw is installed in the threaded hole, and the limiting screw is abutted against the second frame body; alternatively, the first and second electrodes may be,

the support frame still includes the spacer pin, be equipped with the mounting hole on the first support body, be equipped with a plurality of spacing holes on the second support body, it is a plurality of spacing hole is followed the slip direction interval of second support body is arranged, the spacer pin stretches into the mounting hole with spacing hole and fixed first support body with the second support body.

Optionally, the vehicle body comprises a vehicle box and a base, the vehicle box is connected with the support frame, the vehicle box is provided with a first end and a second end which are arranged along the movement direction of the vehicle body, and the first end is rotatably connected with the base;

the automobile body still includes first regulating part, first regulating part is followed the direction of height of automobile body with second end swing joint, first regulating part with the base butt, perhaps, first regulating part is followed the direction of height of automobile body with base swing joint, first regulating part with second end butt.

Optionally, the wagon box is provided with a level gauge.

Optionally, a display and a speed sensor are further arranged on the vehicle body, and the display is electrically connected with the speed sensor.

The utility model also provides an experiment demonstration device, which comprises a track plate, a second adjusting piece and a physical experiment demonstration vehicle, wherein the physical experiment demonstration vehicle comprises a vehicle body, a support frame, a clamp and a remote controller, and the support frame is connected with the vehicle body and extends along the height direction of the vehicle body; the clamp is connected with one end of the support frame, which is far away from the vehicle body, and is used for clamping a heavy object block; the remote controller is electrically connected with the clamp to control the clamp to open and close; the physical experiment demonstration vehicle is placed on the front face of the track plate, and the second adjusting piece is movably connected with the track plate along the thickness direction of the track plate, so that the second adjusting piece can extend out of the back face of the track plate.

Optionally, the experiment demonstration device further comprises a traction piece, a pulley and a connecting rope, wherein the pulley is arranged on the track plate, and the connecting rope is respectively connected with the traction piece and the physical experiment demonstration vehicle and is positioned on the pulley.

The utility model discloses technical scheme is through erection bracing frame on the automobile body to at the one end sectional fixture who keeps away from the automobile body of support frame, through opening and shutting of remote controller control anchor clamps, make the heavy object piece in the anchor clamps can move towards the automobile body. Because the heavy object in the clamp is free to fall in the vertical direction after being separated from the clamp, namely, air resistance is ignored, and the heavy object is not influenced by external force after being separated from the clamp. Compared with the mode of verifying through the paper tape and the dotting timer, because friction force exists between the paper tape and the dotting timer all the time, the friction force can influence the movement of the vehicle body and the dotting precision of the dotting timer, and further the experimental data error is larger. In the scheme, the heavy object blocks are not influenced by external force after being separated from the clamp, and the friction force between the dotting timer and the paper tape does not exist, so that the data error can be greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of a physical experiment demonstration vehicle of the present invention;

fig. 2 is a schematic structural view of an embodiment of the experimental demonstration apparatus of the present invention, which is placed on a table;

fig. 3 is a schematic structural view of the track plate in fig. 2.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a physics experiment demonstration car for the demonstration of physics experiment, for example be used for mechanics or kinematics's verification demonstration etc..

In the embodiment of the present invention, as shown in fig. 1, the physical experiment demonstration vehicle includes:

a vehicle body 10;

a support frame 13 connected to the vehicle body 10 and extending in the height direction of the vehicle body 10;

the clamp 20 is connected with one end of the support frame 13 far away from the vehicle body 10, and the clamp 20 is used for clamping the heavy object 21; and the number of the first and second groups,

and the remote controller is electrically connected with the clamp 20 to control the clamp 20 to open and close.

For better explanation, the side where the support frame 13 is located is taken as the upper side, and the side where the vehicle body 10 is located is taken as the lower side, but when the placing posture of the physical experiment demonstration vehicle is changed, the directional indication between the support frame 13 and the vehicle body 10 is correspondingly changed.

The support frame 13 may be installed at the upper end or the side of the vehicle body 10, and in some embodiments, the support frame 13 may be arranged straight, the clamp 20 may be installed at the side of the support frame 13, or may be arranged inclined or bent in a direction away from the vehicle body 10, the clamp 20 may be installed at the side or the end surface of the support frame 13, or may extend the end of the support frame 13 away from the vehicle body 10 toward the side, and the clamp 20 may be installed at the side, the lower surface or the end surface of the support frame 13, or the like.

It should be noted that the form of the clamp 20 for clamping the weight block 21 can be various, for example, in some embodiments, the clamp 20 can be a chuck or a suction cup; or the clamp 20 comprises an abutting part and a driving part, the driving part and the abutting part clamp the heavy object block 21 together, the remote controller is electrically connected with the driving part, and the driving part can be controlled to be far away from or close to the heavy object block 21 through the remote controller, wherein the driving part can be an air cylinder or a hydraulic cylinder and the like; or the clamp 20 is provided with a containing groove with a downward opening, the notch of the containing groove is provided with a limiting piece, the heavy object block 21 is placed in the containing groove, the remote controller is electrically connected with the limiting piece, and the limiting piece can be controlled by the remote controller to be far away from or extend to the notch of the containing groove; or the clamp 20 is an electromagnet, the weight block 21 has ferromagnetism, the clamp 20 is connected with the weight block 21 through magnetic force, and the remote controller is electrically connected with the electromagnet and can control the electromagnet to be powered on or powered off through the remote controller.

In this embodiment, a power supply (not shown) is further disposed on the vehicle body 10, the power supply is electrically connected to the clamp 20, and the remote controller is wirelessly connected to the clamp 20. In another embodiment, the body 10 is further provided with a first switch (not shown), and the first switch is electrically connected to the power supply and is used for controlling the power supply to be turned on or off, that is, the first switch is a main switch of a circuit on the body 10, and when the physical experiment demonstration car is idle, the first switch is turned off, so that the power supply is prevented from continuously supplying power to the clamp 20, and the service life of the power supply is prolonged.

In the present embodiment, the clamp 20 is located above the vehicle body 10, and when the clamp 20 is opened, the weight block 21 placed in the clamp 20 makes a free-fall movement toward the vehicle body 10. In this manner, a recording device (not shown) can be placed on the vehicle body 10 such that the recording device is located directly below the jig 20, and the weight 21 in the jig 20 can be dropped onto the recording device in a stationary state of the vehicle body 10. Therefore, the first Newton's law can be verified, firstly, the vehicle body 10 makes uniform-speed linear motion, in the motion process of the vehicle body 10, the clamp 20 is controlled to be opened through the remote controller, so that the heavy object block 21 in the clamp 20 freely falls towards the vehicle body 10, because the vehicle body 10 makes uniform-speed linear motion, at the moment that the heavy object block 21 in the clamp 20 is separated from the clamp 20, the motion speed of the heavy object block 21 in the horizontal direction is the same as the motion speed of the vehicle body 10, air resistance is ignored, namely, the heavy object block 21 makes uniform-speed linear motion in the horizontal direction, and makes free-falling motion in the vertical direction, and finally, the small ball falls onto the recording device. In fig. 1, X is a horizontal direction and Y is a vertical direction. It can be concluded that after the weight block 21 is separated from the clamp 20 and before the weight block 21 reaches the recording device, the motion direction of the weight block 21 in the horizontal direction is the same as the motion direction of the vehicle body 10, and the motion speed of the weight block 21 in the horizontal direction is the same as the motion speed of the vehicle body 10, so that newton's first law can be verified, that is, any object needs to keep a uniform linear motion or a static state until an external force forces it to change the motion state. And then the mass of the heavy object block 21 or the movement speed of the vehicle body 10 is respectively changed to carry out a plurality of tests, and the heavy object block 21 can fall on the recording device, so that Newton's first law can be demonstrated at multiple angles. Wherein, a driving component can be arranged on the vehicle body 10, and the vehicle body 10 is driven by the driving component to move linearly at a constant speed; the vehicle body 10 may be placed on a sloping table, the angle of inclination of the sloping table may be adjusted to allow the vehicle body 10 to move linearly at a uniform speed, and so on. In addition, the recording device may be a box with an upward opening, or may be a copy sheet, and when the recording device is a copy sheet, the copy sheet includes a copy layer and a recording layer, or may be an inductor, such as an infrared sensor or a hall sensor.

The utility model discloses technical scheme is through erection bracing frame 13 on automobile body 10 to at the one end sectional fixture 20 of keeping away from automobile body 10 of support frame 13, through opening and shutting of remote controller control fixture 20, make heavy object piece 21 in the anchor clamps 20 can move towards automobile body 10. Since the weight 21 in the jig 20 is free-falling in the vertical direction after being separated from the jig 20, that is, neglecting the air resistance, the weight 21 is not affected by the external force after being separated from the jig 20. Compared with the mode of verifying through the paper tape and the dotting timer, because friction force exists between the paper tape and the dotting timer all the time, the friction force can influence the movement of the vehicle body 10 and the dotting precision of the dotting timer, and further the error of experimental data is larger. In the scheme, the weight block 21 is not influenced by external force after being separated from the clamp 20, and the friction force between a dotting timer and a paper tape does not exist, so that the data error can be greatly reduced.

In this embodiment, the clamp 20 is an electromagnet, the electromagnet is arranged towards the car body 10, the physical experiment demonstration car further comprises a heavy object block 21, and the heavy object block 21 is a ferromagnetic heavy object block. Specifically, the heavy material masses 21 may be any one of iron balls, iron alloy balls, cobalt alloy balls, nickel balls, and nickel alloy balls, and the following description will be given taking the heavy material masses 21 as iron balls, but not limited thereto. The electromagnet is electrically connected with a power supply, the remote controller is wirelessly connected with the electromagnet, and the electromagnet can be controlled to be powered on or powered off through the remote controller. The electromagnet is arranged at one end of the support frame 13 far away from the vehicle body 10 and is provided with a lower surface facing the vehicle body 10, and when the electromagnet is electrified, the electromagnet generates magnetic force, so that an iron ball can be adsorbed on the lower surface of the electromagnet. When the electromagnet is powered off, the magnetic force of the electromagnet disappears, and the iron ball and the electromagnet are separated to move towards the free falling body of the vehicle body 10. It can be understood that the electro-magnet passes through magnetic force and adsorbs the iron ball on its lower surface, and in the twinkling of an eye of the outage, magnetic force disappears, and the iron ball can fall down towards automobile body 10, compares in the mode of chuck or three-jaw anchor clamps 20 centre gripping iron ball, and this scheme can avoid the iron ball to receive anchor clamps 20's interference in the twinkling of an eye that breaks away from anchor clamps 20, can improve experimental data's accuracy. In addition, the surface of the iron ball is smooth, so that the shape of the iron ball is more regular, and the influence of air resistance on the iron ball in the falling process can be reduced. Of course, in other embodiments, the heavy object block 21 may be conical or ellipsoidal, and so on. In one embodiment, the iron ball has a spherical tangent plane, and the spherical tangent plane is attached to the lower surface of the electromagnet, so that the contact area between the electromagnet and the iron ball can be increased, and the adsorption effect of the electromagnet on the iron ball can be increased.

One or more of the support frames 13 can be arranged, in one embodiment, the physical experiment demonstration vehicle comprises two support frames 13, two clamps 20 and two weight blocks 21, the two support frames 13 are respectively provided with the clamp 20, and the remote controller is electrically connected with the two clamps 20. Specifically, each support frame 13 is provided with a clamp 20, the clamp 20 clamps a heavy object 21, the remote controller is wirelessly connected with the two clamps 20, and the two clamps 20 can be opened simultaneously through the remote controller, so that the heavy object 21 falls toward the vehicle body 10 simultaneously. It can be understood that when the two support frames 13, the two clamps 20 and the two weight blocks 21 are arranged, it is equivalent to that two sets of experimental data can be obtained in the movement of the vehicle body 10, for example, when the newton first law is verified, the mass setting of the two weight blocks 21 may be different, or the height setting of the two support frames 13 may be different, so that a plurality of sets of experimental data can be obtained in one movement of the vehicle body 10, the number of experiments can be reduced, the time can be saved, other parameters which do not need to be changed are consistent, and the error of the experimental data can be reduced. In addition, in an embodiment, the two support frames 13 are symmetrically arranged along the width direction of the vehicle body 10, and the width direction of the vehicle body 10 is perpendicular to the movement direction of the vehicle body 10, so that the structural distribution of the vehicle body 10 is more uniform, and the movement effect of the vehicle body 10 can be improved. Of course, in other embodiments, the remote controllers may be electrically connected to the two clamps 20 respectively, and the opening and closing of the two clamps 20 may be controlled respectively; or two remote controllers are provided and electrically connected with the two clamps 20 in a one-to-one correspondence manner, and the like.

In another embodiment, the physical experiment demonstration vehicle comprises two clamps 20 and two weight blocks 21, wherein the two clamps 20 are both connected with the support frame 13, and the remote controller is electrically connected with the two clamps 20. Specifically, a support frame 13 is disposed on the vehicle body 10, and two clamps 20 are disposed on the support frame 13. Each clamp 20 clamps a heavy object 21, the remote controller is wirelessly connected with the two clamps 20, and the two clamps 20 can be opened simultaneously through the remote controller, so that the heavy object 21 falls to the vehicle body 10 simultaneously. Thus, compared with the mode of arranging two support frames 13, the structure of the vehicle body 10 can be simplified, and the cost can be reduced.

In this embodiment, the supporting frame 13 includes a first frame 131 and a second frame 132, the first frame 131 is fixed on the vehicle body 10, the clamp 20 is installed on the second frame 132, and the second frame 132 is movably connected to the first frame 131 along the extending direction of the supporting frame 13. specifically, the first frame 131 and the second frame 132 are separately disposed, and the first frame 131 and the second frame 132 both extend along the height direction of the vehicle body 10, and the second frame 132 can move along the height direction of the vehicle body 10 relative to the first frame 131. since the clamp 20 is installed on the second frame 132, the height of the clamp 20 relative to the vehicle body 10 can be adjusted, that is, the height parameter of the weight block 21 can be adjusted accordingly, and compared with the way of replacing the whole supporting frame 13 when the height parameter of the weight block 21 needs to be changed, the scheme does not need to disassemble and assemble the supporting frame again, has a simple structure and convenient operation, in one embodiment, the end of the second frame 132 far away from the vehicle body 10 is bent toward the side of the first frame 131, that the second frame 132 is in an inverted "L" shape, the clamp 20 is installed on the surface of the vehicle body 10, and the end face of the clamp 20 or the end face of the.

For example, in an embodiment, the first frame body 131 is tubular, the second frame body 132 is rod-shaped, the second frame body 132 extends into the first frame body 131 and is slidably connected to the first frame body 131, the supporting frame 13 further includes a limit screw 133, a threaded hole (not shown) is formed in the first frame body 131, the limit screw 133 is installed in the threaded hole, and the limit screw 133 abuts against the second frame body 132. Specifically, the first frame 131 is a square tube, the second frame 132 is a square rod, but the second frame 132 may also be a hollow rod, and the second frame 132 slides in the first frame 131. The pipe wall of the first frame body 131 is provided with a threaded hole in a penetrating manner, the limiting screw 133 is installed in the threaded hole, and the second frame body 132 is fixed relative to the first frame body 131 by screwing the limiting screw 133 and abutting against the second frame body 132. Because second support body 132 slides in first support body 131, be equivalent to first support body 131 can carry on spacingly to second support body 132, can avoid second support body 132 skew towards the side to so can also improve the area of contact of first support body 131 and second support body 132, can improve the stability of second support body 132. In addition, the limit screw 133 has a simple structure, is convenient to replace, can reduce the cost, and can support the second frame 132 tightly on the first frame 131, thereby further improving the stability of the second frame 132. Further, in an embodiment, the second frame 132 is provided with a scale 134, and the scale 134 represents the height of the heavy object 21 from the surface of the vehicle body 10, so that the height of the fixture 20 can be clear when the second frame 132 is adjusted, data recording is convenient, and in an embodiment where two support frames 13 are provided, the height of the two support frames 13 can be adjusted to be consistent.

In another embodiment, the supporting frame 13 further includes a limiting pin (not shown), the first frame body 131 is provided with a mounting hole (not shown), the second frame body 132 is provided with a plurality of limiting holes, the plurality of limiting holes are arranged at intervals along the sliding direction of the second frame body 132, and the limiting pin extends into the mounting hole and the limiting hole to fix the first frame body 131 and the second frame body 132. It can be understood that when the first frame body 131 and the second frame body 132 are fixed, the limit pin is simultaneously inserted into the mounting hole and the limit hole, so that the relative movement of the first frame body 131 and the second frame body 132 can be limited. The plurality of limiting holes are uniformly arranged at intervals along the sliding direction of the second frame 132, so that the height of the fixture 20 corresponding to each limiting hole is fixed, and therefore, when the height of the fixture 20 is adjusted, only the limiting hole with the corresponding height needs to be selected, the height size of the fixture 20 does not need to be determined through detailed adjustment, and the operation is simple.

Of course, in other embodiments, the second frame 132 is a threaded rod, the second frame 132 is provided with a threaded hole, the second frame 132 extends into the threaded hole to be in threaded connection with the first frame 131, the second frame 132 can be moved in a direction away from the vehicle body 10 by rotating the second frame 132, and the height of the clamp 20 relative to the vehicle body 10 can be adjusted.

In this embodiment, the vehicle body 10 includes a compartment 11 and a base 12, the compartment 11 is connected to the support frame 13, the compartment 11 has a first end 111 and a second end 112 arranged along a moving direction of the vehicle body 10, and the first end 111 is rotatably connected to the base 12. The vehicle body 10 further includes a first adjusting member 14, the first adjusting member 14 is movably connected to the second end 112 along the height direction of the vehicle body 10, and the first adjusting member 14 abuts against the base 12, or the first adjusting member 14 is movably connected to the base 12 along the height direction of the vehicle body 10, and the first adjusting member 14 abuts against the second end 112. Specifically, the supporting frame 13 is disposed above the loading platform 11, the supporting frame 13 is located at the first end 111, the loading platform 11 has an upward opening, and the weight block 21 falls into the loading platform 11 through the opening when falling freely. The first end 111 is connected with the edge rotation of base 12, and first end 111 and base 12 interval set up for base 12 rotates relatively to railway carriage 11, through set up first regulating part 14 on automobile body 10, can adjust the distance of second end 112 and base 12, and then makes railway carriage 11 can incline relatively with base 12, and the slope contained angle between railway carriage 11 and the base 12 can be adjusted through first regulating part 14. In this way, when the vehicle body 10 is placed on a horizontal surface and moved, the first adjusting member 14 is adjusted so that the base 12 is parallel to the loading platform 11, that is, the loading platform 11 is in a horizontal state. When the vehicle body 10 is placed on an inclined surface to move, the carriage 11 and the base 12 can be relatively inclined through the first adjusting part 14, and then the carriage 11 is adjusted to be horizontal. So, can guarantee that heavy object piece 21 all the time falls to the upper surface of railway carriage 11 vertically, can understand, when railway carriage 11 level sets up, the height of heavy object piece 21 is the distance between railway carriage 11 upper surface and anchor clamps 20 promptly, compares in heavy object piece 21 and falls on the railway carriage 11 of slope, so can confirm the whereabouts height of heavy object piece 21 better, can reduce the height error of heavy object piece 21 whereabouts, and then can reduce the time error when calculating the free fall body of heavy object piece 21. Specifically, the first end 111 and the base 12 may be hinged, or the first end 111 and the base 12 may be connected through rubber or the like. For example, in one embodiment, first end 111 is hingedly coupled to base 12. Of course, the vehicle box 11 may have a flat plate shape or the like.

The first adjusting member 14 has various structures, for example, in an embodiment, the first adjusting member 14 is a screw, the second end 112 of the compartment 11 is provided with a threaded hole, the screw is disposed in the threaded hole, and the screw is screwed so that the screw extends toward the base 12 and abuts against the base 12. The distance between the second end 112 and the base 12 can be adjusted by adjusting the extension length of the screw, so as to adjust the inclination angle between the compartment 11 and the base 12. The mode has simple structure, convenient operation and reduced cost. In another embodiment, the first adjusting member 14 is a screw, a threaded hole is formed in the base 12, the screw is disposed in the threaded hole, and the screw is screwed so that the screw extends toward the second end 112 to abut against the second end 112, thereby adjusting the inclination angle between the compartment 11 and the base 12. Of course, in other embodiments, the first adjusting member 14 is also rod-shaped, one end of the first adjusting member 14 is rotatably connected to the base 12, the second end 112 is provided with a hole for avoiding, the first adjusting member 14 extends out of the hole for avoiding, the first adjusting member 14 is provided with an external thread, the first adjusting member 14 is sleeved with a nut, the nut is located below the base 12, and the inclination angle between the compartment 11 and the base 12 and the like can be adjusted by adjusting the distance between the nut and the base 12.

In this embodiment, the car 11 is provided with a level gauge 30. It can be understood that, when the car 11 is provided with the level gauge 30, whether the car 11 is in a horizontal state can be detected through the level gauge 30. Specifically, the spirit level 30 is installed at the upper surface of the carriage 11, and when the first adjusting member 14 is adjusted, the display state of the spirit level 30 can be observed to accurately judge that the carriage 11 is in the horizontal state, and compared with the visual observation, the level 30 is arranged to improve the adjustment precision and reduce the error. The level 30 may be various, such as a bubble level 30 or an electronic level 30, among others. In one embodiment, the level 30 is tubular and extends in the direction of movement of the vehicle body 10. Additionally, one or more levels 30 may be provided on the body 10.

In this embodiment, the vehicle body 10 is further provided with a display 40 and a speed sensor (not shown), and the display 40 is electrically connected to the speed sensor. Particularly, speedtransmitter and display 40 all are connected with the power electricity, and speedtransmitter is hall sensor, and speedtransmitter is used for detecting the rotational speed of the wheel of physics experiment demonstration car, shows the rotational speed data of wheel through display 40, so convenience of customers observes, also convenience of customers adjusts physics experiment demonstration car, makes it be in at the uniform motion state. The display 40 may be a display screen or a digital display meter, etc. In addition, in the embodiment where two support frames 13 are provided, the display 40 is disposed between the two support frames 13, so that the structure of the vehicle body 10 can be symmetrical, and the movement effect of the vehicle body 10 can be improved. In one embodiment, the vehicle body 10 is provided with a second switch, the second switch is electrically connected to the display 40, and the second switch is used for controlling the connection or disconnection of the display 40 and the power supply. In addition, in other embodiments, the speed sensor may also be a photogate sensor or the like.

The utility model discloses still provide an experiment presentation device, please combine to refer to fig. 2, this experiment presentation device includes track board 60, second regulating part 50 and physics experiment demonstration car, and the concrete structure of this physics experiment demonstration car refers to above-mentioned embodiment, because this experiment presentation device has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and it is here no longer repeated. Wherein, the physical experiment demonstration vehicle is placed on the front surface of the track plate 60, and the second adjusting member 50 is movably connected with the track plate 60 along the thickness direction of the track plate 60, so that the second adjusting member 50 can extend out of the back surface of the track plate 60. Specifically, the physical experiment demonstration vehicle is placed on the track plate 60 to move, the track plate 60 can be inclined through the second adjusting piece 50, the physical experiment demonstration vehicle can move on the inclined plane, the gravity of the physical experiment demonstration vehicle is decomposed and has a component force along the movement direction of the physical experiment demonstration vehicle, the friction force between the physical experiment demonstration vehicle and the track plate 60 is balanced through the component force, and the physical experiment demonstration vehicle can move at a constant speed. The experimental demonstration device is simple in structure and can reduce cost. The second adjusting member 50 may be a screw, a threaded hole is formed in the track plate 60, the screw is installed in the threaded hole, and the screw can extend out from the back of the track plate 60, and the extending length of the screw is adjusted, so that the inclination angle of the track plate 60 can be adjusted. Or the second adjusting member 50 is a plurality of cushion blocks, the cushion blocks are stacked, and the cushion blocks are detachably connected with the track plate 60 and the cushion blocks, and the inclination angle of the track plate 60 can be adjusted by increasing or decreasing the cushion blocks, and the like.

In addition, track board 60 can be smooth dull and stereotyped, also can set up two spacing portions at the positive interval of track board 60, and spacing portion is the sharp extension, and two spacing portions are parallel, and the wheel of physics experiment demonstration car is located between two spacing portions, so can guarantee the motion effect of physics experiment demonstration car, avoids the physics experiment demonstration car to take place to deviate. Of course, it is also possible to provide a slide rail 63 on the track plate 60, and provide a slide block at the bottom of the physical experiment demonstration vehicle, so that the physical experiment demonstration vehicle slides on the slide rail 63. Or the track plate 60 is provided with a slide rail 63, and wheels of the physical experiment demonstration vehicle roll on the slide rail 63, and the like.

In an embodiment, referring to fig. 3 in combination, the track plate 60 includes a first end portion 61 and a second end portion 62 arranged along the movement direction of the physical experiment demonstration vehicle, the second adjusting member includes two first screws 51 and two second screws 52, the two first screws 51 are respectively disposed on two opposite sides of the first end portion 61, and the two second screws 52 are respectively disposed on two opposite sides of the second end portion 62. In this manner, the inclination of the track plate 60 can be made by adjusting the first screw 51 on the first end portion 61 and the second screw 52 on the second end portion 62. In addition, two opposite sides of the first end portion 61 can be in a horizontal state by adjusting the two first screws 51, and two opposite sides of the second end portion 62 can be in a horizontal state by adjusting the two second screws 52, so that the physical experiment demonstration vehicle can be ensured to move linearly when moving on the track plate 60, and the physical experiment demonstration vehicle is prevented from being deviated in the moving process due to the inclination of the two opposite sides of the first end portion 61 or the two opposite sides of the second end portion 62.

In this embodiment, the experiment demonstration apparatus further includes a traction member 70, a pulley 80 and a connection rope 90, the pulley 80 is disposed on the track plate 60, and the connection rope 90 is respectively connected to the traction member 70 and the physical experiment demonstration vehicle and is located on the pulley 80. Specifically, the traction member 70 is a loading barrel, a weight can be placed in the loading barrel, a hook is arranged on the physical experiment demonstration vehicle, the connecting rope 90 is respectively connected to the loading barrel and the hook, and the pulley 80 is installed at the edge of the first end 111. When the physical experiment demonstration vehicle is placed on the track plate 60, the connection rope 90 is placed on the pulley 80, and the loading bucket is hung outside the track plate 60. That is, the loading barrel can move towards the ground in a free falling mode, so that the physical experiment demonstration vehicle is pulled, and the physical experiment demonstration vehicle can do uniform acceleration linear motion on the track plate 60. Therefore, the experimental demonstration device can be used for verifying Newton's second law.

The process of verifying newton's second law is as follows:

the track plate 60 is placed on a desktop, the physical experiment demonstration vehicle is placed on the track plate 60, the first switch is switched on, the electromagnet is powered on and generates magnetic force, and the iron ball is adsorbed on the electromagnet. The second adjusting member 50 is adjusted to enable the track slab 60 to be obliquely arranged so as to offset the friction force between the physical experiment demonstration vehicle and the track slab 60, and the physical experiment demonstration vehicle is adjusted to be capable of making uniform motion on the track slab 60 by observing the display 40. The first adjusting member 14 is adjusted so that the container 11 is leveled. The carbon paper is placed and fixed on the carriage 11, and the remote controller is clicked to make the iron ball fall on the carbon paper so as to record the mark of the falling point, namely the zero point position.

The connecting rope 90 is respectively connected with the vehicle body 10 and the loading barrel, the connecting rope 90 is placed on the pulley 80, and a weight with certain mass is placed in the loading barrel to provide tension for the physical experiment demonstration vehicle, so that the physical experiment demonstration vehicle can do uniform variable-speed linear motion.

The physical experiment demonstration vehicle is moved to the second end portion 62 of the track plate 60 to serve as a starting point, the physical experiment demonstration vehicle is released, the physical experiment demonstration vehicle starts to do uniform speed change linear motion on the track plate 60 under the action of tension of the loading barrel, after the physical experiment demonstration vehicle starts to do uniform speed change linear motion for a certain time, the remote controller is clicked, the power supply of the electromagnet is disconnected, the iron ball falls into the compartment 11 and impacts the carbon paper on the compartment 11, and another falling point trace, namely a falling point position, is obtained.

It can be understood that, because the iron ball makes free-falling body movement in the vertical direction, according to the free-falling body movement formula H-1/2 gt²H is the height of the iron ball relative to the compartment 11, g is the gravity acceleration, and the falling time t of the iron ball can be obtained. And because the iron ball is only acted by the gravity in the vertical direction in the falling process, the air resistance is ignored, the iron ball is not stressed in the horizontal direction, and the initial velocity of the iron ball in the horizontal direction is v₀And the initial speed of the iron ball is equal to the speed of the instant physical experiment demonstration vehicle for falling of the iron ball, so that the displacement of the iron ball relative to the table top is equal to the initial speed of the iron ball multiplied by the movement time of the iron ball, namely X_{Ball with ball-shaped section}＝v₀t。

Because there is the pulling force of loading the bucket all the time, the physics experiment demonstration car begins the in-process that contacts carbon paper on the railway carriage 11 in the twinkling of an eye at the iron ball whereabouts, and in the time t's of iron ball whereabouts in-process promptly, according to newton's second law F ═ ma, F is the total pulling force of loading the bucket, and m is the total mass of physics experiment demonstration car and loading bucket, and a is the acceleration of physics experiment demonstration car. And the displacement of the physical experiment demonstration vehicle relative to the table top at the time t is according to the formula X of the uniform variable speed linear motion_{Vehicle with wheels}＝v₀t+1/2at²So that the formula △ X ═ X can be obtained_{Vehicle with wheels}-X_{Ball with ball-shaped section}＝1/2at²The acceleration a of the physical experiment demonstration vehicle can be obtained, and the acceleration a is substituted into the formula F ═ ma, namely Newton's second law can be demonstrated and verified through the experiment demonstration device. In the embodiment with two support frames 13 and two iron balls, two iron balls with different masses can be arranged at the same time for comparison test. In the embodiment where the supporting frame 13 includes the first frame 131 and the second frame 132, the height of the supporting frame 13 may be changed for comparison. In addition, the total mass of the loading barrel can be changed or the iron ball can be changedTime point of fall, etc., a demonstration exploration can be made from different angles for newton's second law.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A physical experiment demonstration vehicle, comprising:

a vehicle body;

a heavy material block;

the remote controller is electrically connected with the clamp so as to control the clamp to open and close;

the physical experiment demonstration vehicle comprises two support frames, two clamps and two heavy object blocks, the clamps are arranged on the two support frames, and the remote controller is electrically connected with the two clamps; alternatively, the first and second electrodes may be,

2. The physical experiment demonstration vehicle of claim 1 wherein the clamp is an electromagnet, the electromagnet is disposed toward the vehicle body, and the heavy object is a ferromagnetic heavy object.

3. The physical experiment demonstration vehicle according to claim 1, wherein the support frame comprises a first frame body and a second frame body, the first frame body is fixed on the vehicle body, the clamp is mounted on the second frame body, and the second frame body is movably connected with the first frame body along the extension direction of the support frame.

4. The physical experiment demonstration vehicle according to claim 3, wherein the first frame body is tubular, the second frame body is rod-shaped, and the second frame body extends into the first frame body and is slidably connected with the first frame body;

5. The physical experiment demonstration vehicle according to any one of claims 1 to 4, wherein the vehicle body comprises a vehicle box and a base, the vehicle box is connected with the support frame, the vehicle box is provided with a first end and a second end which are arranged along the movement direction of the vehicle body, and the first end is rotatably connected with the base;

6. The physical experiment demonstration vehicle of claim 5 wherein said compartment is provided with a level.

7. The physical experiment demonstration vehicle of claim 1, wherein a display and a speed sensor are further arranged on the vehicle body, and the display is electrically connected with the speed sensor.

8. An experimental demonstration apparatus comprising a track plate, a second adjustment member and a physical experimental demonstration vehicle as claimed in any one of claims 1 to 7, wherein said physical experimental demonstration vehicle is placed on the front surface of said track plate, and said second adjustment member is movably connected with said track plate along the thickness direction of said track plate so that said second adjustment member can be extended from the back surface of said track plate.

9. The experimental demonstration device according to claim 8 further comprising a traction member, a pulley and a connection rope, wherein said pulley is disposed on said track plate, and said connection rope is connected to said traction member and said physical experiment demonstration vehicle, respectively, and is disposed on said pulley.