Physical teaching aid for demonstrating horizontal projectile motion

Abstract

The utility model relates to the technical field of experiment teaching aids, and discloses a physics teaching aid for horizontal projectile motion demonstration, which comprises a water storage box, short plates are symmetrically and fixedly connected to the side walls of the water storage box, cylinders are fixedly connected to the tops of the short plates, movable columns are slidably connected to the inner walls of the cylinders, and a first circular ring is fixedly connected to the side walls of the two cylinders together. The inner wall of the second circular ring is fixedly connected with an experiment cylinder, the inner wall of the experiment cylinder is in sealed sliding connection with a piston, the side wall of the water storage box is fixedly communicated with a first long pipe, the side wall of the water storage box is fixedly connected with a water storage tank, and one end of the first long pipe is fixedly communicated with the side wall of the water storage tank; according to the utility model, when a user adjusts the height of the experiment cylinder, the height change before and after the adjustment of the experiment cylinder can be more visually observed according to the position change of the scale marks, so that a viewer can more conveniently know that the horizontal projectile motion is related to the height of a projectile point of the horizontal projectile motion.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental teaching aids, in particular to a physical teaching aid used for horizontal projectile motion demonstration. Background Art

[0002] An object is thrown horizontally with a certain initial velocity. If the object is only affected by gravity, this kind of motion is called horizontal motion. Horizontal motion is of vital importance in physical science. The time of horizontal motion is only related to the vertical height of the throwing point, while the horizontal displacement is related to both time and initial velocity. In middle school, students have a preliminary understanding of the content of Newtonian mechanics, but some students do not understand it well on paper and need a more intuitive demonstration to understand it.

[0003] Chinese patent CN212181752U discloses a horizontal projectile motion demonstrator, which relates to the field of experimental teaching aid technology. It includes a water reservoir, a triangular bracket, a collar, a water storage bucket, a rubber piston, a weight, a cylindrical tube, an L-shaped tube, and a stopcock. The triangular bracket is fixedly mounted on the water reservoir, the collar is welded to the top of the triangular bracket, and the water storage bucket is mounted on the collar. The horizontal projectile motion demonstrator involves filling the water storage bucket with water, inserting a rubber piston, and using the weight of the weight to press the rubber piston downward. Adding weights of different specifications can control the initial downward pressure velocity. When the stopcock on the L-shaped tube is opened, water is ejected to demonstrate horizontal horizontal projectile motion, or when the stopcock on the cylindrical tube is opened, water is ejected to demonstrate vertical falling motion. Due to the existence of relative error, the device provides a qualitative experimental demonstration of basic horizontal projectile motion, which is beneficial for physics teachers and helps students intuitively understand theoretical knowledge.

[0004] The horizontal projection motion demonstrator proposed in the above patent can express the influence of the height and initial velocity of the horizontal projection point on the horizontal projection motion, but it can only know the approximate influence of the height on the horizontal projection motion, and cannot more intuitively feel the influence of the specific height change on the horizontal projection motion. Moreover, after the horizontal projection motion, the water inside the reservoir cannot be quickly reused, which will also cause a waste of water resources and affect the repetition speed of the experiment.

[0005] Therefore, we propose a physical teaching aid for demonstrating horizontal projectile motion in order to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of the utility model is to provide a physical teaching aid for demonstrating horizontal projectile motion, so as to solve the problems raised in the above background technology that the influence of specific height changes on horizontal projectile motion cannot be intuitively felt and the water inside the reservoir cannot be quickly recycled.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a physics teaching aid for demonstrating horizontal projectile motion, comprising a water storage box, wherein the side walls of the water storage box are symmetrically fixedly connected with short plates, the tops of the short plates are fixedly connected with cylinders, the inner walls of the cylinders are slidably connected with moving columns, the side walls of the two cylinders are commonly fixedly connected with a first circular ring, the tops of the two moving columns are commonly fixedly connected with a second circular ring, the inner walls of the second circular rings are fixedly connected with an experimental cylinder, the inner walls of the experimental cylinders are sealingly and slidably connected with a piston, the side walls of the water storage box are fixedly connected with a first long tube, the side walls of the water storage box are fixedly connected with a water tank, and one end of the first long tube is fixedly connected to the side wall of the water tank.

[0008] Preferably, an adjusting bolt is threadedly connected to the side wall of the cylinder, and one end of the adjusting bolt is tightly against the side wall of the movable column.

[0009] Preferably, the side wall of the experimental cylinder is fixedly connected to a laboratory tube, the bottom of the experimental cylinder is fixedly connected to a drainage pipe, scale lines are provided on the outside of the experimental cylinder, and the side wall of the water storage box is fixedly connected to a storage box.

[0010] Preferably, a guide plate is fixedly connected to the inner wall of the water storage box, and the guide plate is a triangular structure when viewed from the side.

[0011] Preferably, a water pump is fixedly installed on the side wall of the water storage box, and the input end of the water pump is fixedly connected to the side wall of the water storage tank through a second long tube.

[0012] Preferably, the output end of the water pump is fixedly connected to a hose, and the other end of the hose is fixedly connected to the side wall of the experimental cylinder.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the present invention, by providing the first circular ring, the second circular ring and the scale lines and other structures, when the user adjusts the height of the experimental cylinder, he can observe the height change of the experimental cylinder before and after adjustment more intuitively according to the position change of the scale lines, thereby allowing the viewer to more conveniently understand that the horizontal projection motion is related to the height of its throwing point.

[0015] 2. In the present invention, by providing structures such as a water pump, a hose and a water outlet box, the user does not need to manually process the water inside the water storage box. After the experiment, the water inside the water storage box can be extracted by the water pump and flow back into the experimental tube, making it convenient for the user to perform the horizontal projection motion demonstration again. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic side view of the overall three-dimensional view of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the air pump and water storage tank in the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the utility model.

[0020] In the figure: 1. Water storage box; 2. Short plate; 3. Cylinder; 4. Moving column; 5. Adjusting bolt; 6. First ring; 7. Second ring; 8. Experimental cylinder; 9. Piston; 10. Experimental tube; 11. Drain pipe; 12. Guide plate; 13. Water storage tank; 14. First long tube; 15. Water pump; 16. Hose; 17. Second long tube; 18. Storage box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1-Figure 3 A physics teaching aid for demonstrating horizontal projectile motion includes a water storage box 1, the side wall of the water storage box 1 is symmetrically fixed with a short board 2, the top of the short board 2 is fixedly connected to a cylinder 3, the short board 2 supports the cylinder 3, the inner wall of the cylinder 3 is slidably connected to a moving column 4, the side walls of the two cylinders 3 are fixedly connected to a first circular ring 6, the tops of the two moving columns 4 are fixedly connected to a second circular ring 7, the inner wall of the second circular ring 7 is fixedly connected to an experimental cylinder 8, and then by adjusting the height of the moving column 4, the height of the experimental cylinder 8 is driven, and then the initial height of the horizontal projectile motion is adjusted. The mouth of the experimental cylinder 8 is at the top, which makes it easy to add external weights to the inside of the experimental cylinder 8 Code, etc., and the initial velocity of the horizontal projection motion can be adjusted by the weight of the weight, etc. The inner diameter of the second ring 7 is smaller than that of the first ring 6, and the experimental cylinder 8 can be easily moved in the direction of the inner wall of the first ring 6. The time of the horizontal projection motion is only related to the vertical height of the throwing point, while the horizontal displacement is related to both time and initial velocity. The inner wall of the experimental cylinder 8 is sealed and slidably connected with a piston 9, and the piston 9 can ensure that the water inside the experimental cylinder 8 will not flow to the top of the piston 9. The side wall of the water storage box 1 is fixedly connected to the first long tube 14, and the side wall of the water storage box 1 is fixedly connected to the water tank 13. One end of the first long tube 14 is fixedly connected to the side wall of the water tank 13.

[0023] An adjusting bolt 5 is threadedly connected to the side wall of the cylinder 3 , and one end of the adjusting bolt 5 is tightly against the side wall of the moving column 4 , so that the height of the moving column 4 can be adjusted by adjusting the adjusting bolt 5 , so as to adjust the height of the experimental cylinder 8 .

[0024] The side wall of the experimental cylinder 8 is fixedly connected to an experimental tube 10, the bottom of the experimental cylinder 8 is fixedly connected to a drainage pipe 11, the outside of the experimental cylinder 8 is provided with scale lines, and the side wall of the water storage box 1 is fixedly connected to a storage box 18, some weights or other experimental equipment can be placed inside the storage box 18. When a horizontal projection motion demonstration is required, the demonstration can be carried out by opening the experimental tube 10, and the user can better compare the height change of the experimental cylinder 8 before and after adjustment according to the height of the scale lines on the outside of the experimental cylinder 8 at the same horizontal line of the top wall of the first ring 6.

[0025] In this embodiment: when it is necessary to perform a horizontal projectile motion experiment demonstration, it is first necessary to adjust the initial velocity and height of the horizontal projectile motion. First, the weight is taken out through the storage box 18, and the weight is placed on the top of the piston 9 through the mouth of the cylinder 3, and then the initial velocity of the horizontal projectile motion is adjusted. Then, the height of the moving column 4 is adjusted by adjusting the bolt 5. The moving column 4 drives the second ring 7 to move, and the second ring 7 drives the experimental cylinder 8 to move, and then the height of the horizontal projectile motion is adjusted. Due to the change in the position of the scale line, the height change of the experimental cylinder 8 before and after adjustment can be seen more intuitively, so that the viewer can watch better. There is already some liquid inside the experimental cylinder 8, and then when the experimental tube 10 is opened, the horizontal projectile motion demonstration can be watched. When the horizontal projectile motion demonstration is not needed, the water inside the experimental cylinder 8 can also be discharged through the drain pipe 11.

[0026] Example 2: This example is an improvement based on Example 1. For details, please refer to Figure 2-Figure 4 A guide plate 12 is fixedly connected to the inner wall of the water storage box 1. The guide plate 12 has a triangular structure when viewed from the side, and the guide plate 12 can guide the water flowing into the water storage box 1 to the pipe mouth of the first long tube 14.

[0027] A water pump 15 is fixedly installed on the side wall of the water storage box 1 , and the input end of the water pump 15 is fixedly connected to the side wall of the water storage tank 13 through a second long tube 17 .

[0028] The output end of the water pump 15 is fixedly connected to a hose 16, and the other end of the hose 16 is fixedly connected to the side wall of the experimental cylinder 8, thereby completing the recycling of water flow. The water flow inside the experimental cylinder 8 flows out to the water storage box 1 through the experimental tube 10, and then passes through the first long tube 14, the water storage tank 13, the second long tube 17, the water pump 15 and the hose 16, and moves to the inside of the experimental cylinder 8 again. The hose 16 is a retractable tube body and can be retracted and moved following the movement of the experimental cylinder 8.

[0029] In this embodiment: when conducting a horizontal projectile motion experiment demonstration, the water inside the experimental cylinder 8 is ejected from the experimental tube 10 and flows into the water storage box 1. At this time, the water pump 15 is activated again, and the water pump 15 absorbs the water inside the water storage box 1 and moves it to the inside of the experimental cylinder 8 again through the first long tube 14, the water tank 13, the second long tube 17, the water pump 15 and the hose 16, so as to facilitate the horizontal projectile motion experiment to be carried out again.

[0030] Working principle: When it is necessary to conduct a horizontal projectile motion experiment demonstration, first adjust the height of the experimental tube 8 by adjusting the bolt 5 to adjust the height of the horizontal projectile motion, then adjust the initial velocity of the horizontal projectile motion by adding weights to the top of the piston 9, open the drain pipe 11 and then conduct the horizontal projectile motion demonstration. When the demonstration is completed, take out the weights and move the piston 9. At this time, the water pump 15 is started again, and the water inside the water storage box 1 can be pumped into the experimental tube 8 again, so that the horizontal projectile motion experiment demonstration can be carried out again later.

[0031] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A physical teaching aid for demonstrating horizontal projectile motion, comprising a water storage box (1), characterized in that: The side wall of the water storage box (1) is symmetrically fixedly connected to a short plate (2), the top of the short plate (2) is fixedly connected to a cylinder (3), the inner wall of the cylinder (3) is slidably connected to a movable column (4), the side walls of the two cylinders (3) are commonly fixedly connected to a first circular ring (6), the tops of the two movable columns (4) are commonly fixedly connected to a second circular ring (7), the inner wall of the second circular ring (7) is fixedly connected to a test cylinder (8), the inner wall of the test cylinder (8) is sealingly slidably connected to a piston (9), the side wall of the water storage box (1) is fixedly connected to a first long tube (14), the side wall of the water storage box (1) is fixedly connected to a water storage tank (13), and one end of the first long tube (14) is fixedly connected to the side wall of the water storage tank (13).

2. A physical teaching aid for demonstrating horizontal projectile motion according to claim 1, characterized in that: An adjusting bolt (5) is threadedly connected through the side wall of the cylinder (3), and one end of the adjusting bolt (5) is tightly pressed against the side wall of the movable column (4).

3. A physical teaching aid for demonstrating horizontal projectile motion according to claim 2, characterized in that: The side wall of the experimental cylinder (8) is fixedly connected to an experimental tube (10), the bottom of the experimental cylinder (8) is fixedly connected to a drainage pipe (11), the outside of the experimental cylinder (8) is provided with scale lines, and the side wall of the water storage box (1) is fixedly connected to a storage box (18).

4. A physical teaching aid for demonstrating horizontal projectile motion according to claim 3, characterized in that: A guide plate (12) is fixedly connected to the inner wall of the water storage box (1), and the guide plate (12) is a triangular structure when viewed from the side.

5. A physical teaching aid for demonstrating horizontal projectile motion according to claim 4, characterized in that: A water pump (15) is fixedly mounted on the side wall of the water storage box (1), and an input end of the water pump (15) is fixedly connected to the side wall of the water storage tank (13) via a second long tube (17).

6. A physical teaching aid for demonstrating horizontal projectile motion according to claim 5, characterized in that: The output end of the water pump (15) is fixedly connected to a hose (16), and the other end of the hose (16) is fixedly connected to the side wall of the experimental cylinder (8).

Images