Primary school science wind direction and wind speed demonstration teaching aid

Abstract

The utility model discloses a primary school science wind direction and wind speed demonstration teaching aid, which belongs to the technical field of demonstration teaching aids and comprises a demonstration teaching aid body, a polygonal frame plate is rotatably arranged on the demonstration teaching aid body, a plurality of end parts of the polygonal frame plate are positioned on the same plane, and wind cups are hinged to the end parts of the polygonal frame plate along the rotating direction of the polygonal frame plate; the device further comprises an arc-shaped rod and an arc-shaped sleeve fixed to the end of the polygonal frame plate, the arc-shaped rod is arranged in the arc-shaped sleeve in a sliding mode, a cushioning spring extruding the arc-shaped rod to stretch out of the arc-shaped sleeve is arranged in the arc-shaped sleeve, the stretching-out end of the arc-shaped rod abuts against the outer wall of the wind cup, and the abutting-against end of the arc-shaped rod is located on the reverse face when the wind cup rotates. When the wind cup is driven by wind power to rotate, wind pressure impact and vibration energy can be effectively absorbed through cooperation of the arc-shaped rod, the cushioning spring and the damper, stress concentration of the connecting portion is reduced, and the wind cup is prevented from being broken due to long-term stress or strong wind impact.

Description

Technical Field

[0001] This utility model relates to the field of demonstration teaching aids, and in particular to a demonstration teaching aid for wind direction and wind speed in elementary school science. Background Technology

[0002] In elementary school science, wind direction and speed demonstration tools primarily use wind vanes and cup anemometers to measure wind speed. A wind vane uses its tail fin to be propelled by the wind, ensuring the arrow always points in the direction of the wind; a cup anemometer relies on wind power to rotate a hemispherical cup, with faster rotation indicating greater wind speed. These tools, through their intuitive mechanical structures, simulate real meteorological measurement principles, helping students understand the basic concepts of wind direction and speed while cultivating their observation and practical skills.

[0003] However, when the wind speed is too high, the connection of the wind cup is prone to breakage. The main reason is that the centrifugal force and wind pressure generated by high-speed rotation cause the connection to bear huge mechanical stress, which in turn causes resonance and aggravates structural vibration, resulting in breakage. Utility Model Content

[0004] In response to the shortcomings of existing technologies, this utility model provides a teaching aid for demonstrating wind direction and speed in elementary school science, which solves the technical problem of easy breakage at the connection of the wind cup due to stress, and achieves the purpose of extending the service life of the wind cup.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a primary school science wind direction and wind speed demonstration teaching aid, including a demonstration teaching aid body, a polygonal frame plate is rotatably arranged on the demonstration teaching aid body, multiple ends of the polygonal frame plate are on the same plane, and wind cups are hinged to the ends of the polygonal frame plate along its rotation direction.

[0006] It also includes an arc-shaped rod and an arc-shaped sleeve fixed to the end of the polygonal frame plate. The arc-shaped rod is slidably disposed in the arc-shaped sleeve. The arc-shaped sleeve is provided with a damping spring that compresses the arc-shaped rod to extend out of the arc-shaped sleeve. The extended end of the arc-shaped rod abuts against the outer wall of the wind cup, and its abutting end is located on the opposite side when the wind cup rotates.

[0007] Preferably, the inner top wall of the arc-shaped sleeve is provided with an arc-shaped slider, and the top of the arc-shaped rod is provided with an arc-shaped rail groove that allows the arc-shaped slider to slide along its internal path. The interior of the arc-shaped rail groove is also provided with a damper that works in conjunction with the shock-absorbing spring to compress the arc-shaped rod and extend it out of the arc-shaped sleeve.

[0008] Preferably, the outer walls of both the arc-shaped rod and the arc-angle slider are provided with a plush rubber plate, and the plush rubber plate is a plate-shaped structure with flocking on the upper surface of rubber material.

[0009] Preferably, one end of the wind cup is also provided with a rotating cylinder that is rotatably connected. The outer wall of the rotating cylinder is provided with a bevel gear. The bottom of the arc-shaped rod contact end is provided with a connecting plate. The top of the connecting plate is provided with a half-bevel gear that meshes with the bevel gear to make the rotating cylinder rotate in the wind direction.

[0010] Preferably, the inner diameters of the half-bevel gear and the bevel gear are set at 3:1, so that the rotation range of the drum is ≤30°.

[0011] By employing the above technical solution, this utility model provides a teaching aid for demonstrating wind direction and speed in elementary school science, which has at least the following beneficial effects:

[0012] 1. When the wind cup of this utility model rotates under wind power, it can effectively absorb wind pressure impact and vibration energy through the cooperation of the arc rod, the damping spring and the damper, reduce stress concentration at the connection parts, prevent the wind cup from breaking due to long-term stress or strong wind impact, and suppress the vibration of the wind cup, thus extending the service life of the equipment.

[0013] 2. This utility model converts the linear movement of the half-bevel gear into the rotational motion of the bevel gear, which can adjust the tilt angle of the wind cup, realize feedback control between wind speed, tilt angle, and rotational speed, reduce the angle between the concave surface of the wind cup and the wind direction, reduce the wind pressure difference, slow down the rotational speed of the wind cup, and reduce the centrifugal load. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 For the present utility model Figure 2 A magnified structural diagram of A in the middle;

[0018] Figure 4 This is another partial cross-sectional view of the present invention.

[0019] In the diagram: 1. Demonstration teaching aid body; 2. Multi-angled frame; 3. Wind cup; 4. Arc rod; 5. Arc sleeve; 6. Shock-absorbing spring; 7. Arc-angle slider; 8. Arc track groove; 9. Damper; 10. Rotary cylinder; 11. Bevel gear; 12. Linkage plate; 13. Half bevel gear. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-4 As shown, the elementary school science wind direction and wind speed demonstration teaching aid includes a demonstration teaching aid body 1, a polygonal frame 2 rotatably mounted on the demonstration teaching aid body 1, multiple ends of the polygonal frame 2 being on the same plane, and wind cups 3 being hinged to the ends of the polygonal frame 2 along its rotation direction.

[0022] It also includes an arc-shaped rod 4 and an arc-shaped sleeve 5 fixed to the end of the polygonal frame plate 2. The arc-shaped rod 4 is slidably disposed in the arc-shaped sleeve 5. The arc-shaped sleeve 5 is provided with a damping spring 6 that squeezes the arc-shaped rod 4 out of the arc-shaped sleeve 5. The protruding end of the arc-shaped rod 4 abuts against the outer wall of the wind cup 3, and its abutting end is located on the opposite side when the wind cup 3 rotates.

[0023] Specifically, the hemispherical wind cup 3 rotates under wind power, and its rotational speed is proportional to the wind speed. During rotation, the wind cup 3 moves at the end of the polygonal frame plate 2, pushing the arc-shaped rod 4 to slide along the arc-shaped sleeve 5 and compress the internal damping spring 6, which plays a buffering role. This can effectively absorb the impact of wind pressure and vibration energy, reduce stress concentration at the connection points, and thus prevent the wind cup 3 from breaking due to long-term stress or strong wind impact, so that the wind cup 3 can still maintain stable operation when rotating at high speed.

[0024] The inner top wall of the arc sleeve 5 is provided with an arc-shaped slider 7, and the top of the arc rod 4 is provided with an arc-shaped rail groove 8 that allows the arc-shaped slider 7 to slide along its internal path. The inside of the arc-shaped rail groove 8 is also provided with a damper 9 that works with the shock-absorbing spring 6 to compress the arc rod 4 and extend it out of the arc sleeve 5.

[0025] Furthermore, the movement of the arc-shaped rod 4 causes the arc-shaped slider 7 to slide along the arc-shaped rail groove 8, compressing the damping spring 6. At the same time, the arc-shaped slider 7 synchronously squeezes the damper 9. The cooperation between the damping spring 6 and the damper 9 can adapt to different wind speeds, ensuring that the buffering force and rotation speed are dynamically matched, forming a double buffering effect. The damping spring 6 absorbs the instantaneous impact force, while the damper 9 provides progressive resistance, which together suppresses the vibration of the wind cup 3, effectively disperses mechanical stress, reduces fatigue wear at the connection parts, and thus extends the service life of the equipment.

[0026] Both the outer walls of the arc rod 4 and the arc-angle slider 7 are provided with plush rubber plates, and the plush rubber plates are plate-shaped structures with flocked upper surfaces made of rubber.

[0027] Furthermore, the contact surfaces of the arc-shaped rod 4 within the arc-shaped sleeve 5 and the arc-shaped slider 7 within the arc-shaped rail groove 8 both adopt a flocked rubber plate structure on the surface of the rubber substrate. Through the elastic compensation of the rubber layer and the lubrication characteristics of the flocked surface, the dynamic friction coefficient is stabilized in the range of 0.1-0.3, effectively eliminating the swaying and breakage problems caused by the increased gap after repeated back-and-forth sliding, thus ensuring the stability of the wind cup 3 during long-term operation.

[0028] As a further embodiment of this utility model, one end of the wind cup 3 is also provided with a rotating cylinder 10 that is rotatably connected. The outer wall of the rotating cylinder 10 is provided with a bevel gear 11. The bottom of the contact end of the arc-shaped rod 4 is provided with a connecting plate 12. The top of the connecting plate 12 is provided with a half bevel gear 13 that meshes with the bevel gear 11 to make the rotating cylinder 10 rotate in the wind direction.

[0029] Specifically, when the wind pushes the arc-shaped rod 4 to move, the semi-bevel gear 13 at the top of the connecting plate 12 meshes with the bevel gear 11 on the outer wall of the rotating drum 10. The rotating drum 10 drives the wind cup 3 to deflect synchronously, reducing the angle between the concave surface of the wind cup 3 and the wind direction, thereby weakening the wind pressure difference between the concave and convex surfaces and reducing the centrifugal force load on the connection. Traditionally, the wind cup 3 only passively bears the wind force, but this structure actively adjusts the tilt angle through gear transmission, realizing feedback control of "the greater the wind speed - the greater the tilt angle - the faster the rotation speed".

[0030] The inner diameters of the half-bevel gear 13 and the bevel gear 11 are set at 3:1, so that the rotation range of the rotating drum 10 is ≤30°.

[0031] Furthermore, the linear movement of the half-bevel gear 13 is converted into the rotational motion of the bevel gear 11, driving the rotating drum 10 to rotate. The gear transmission ratio limits the rotation range of the rotating drum 10 to ≤30°, ensuring that the tilt angle adjustment range of the wind cup 3 is controllable and avoiding excessive tilting that could affect the accuracy of wind speed measurement.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A primary school science demonstration teaching aid for wind direction and speed, comprising the demonstration teaching aid body (1), characterized in that, The demonstration teaching aid body (1) is rotatably provided with a polygonal frame plate (2), and multiple ends of the polygonal frame plate (2) are on the same plane. The ends of the polygonal frame plate (2) are hinged with wind cups (3) along their rotation direction. It also includes an arc-shaped rod (4) and an arc-shaped sleeve (5) fixed to the end of the polygonal frame plate (2). The arc-shaped rod (4) is slidably disposed in the arc-shaped sleeve (5). The arc-shaped sleeve (5) is provided with a damping spring (6) that squeezes the arc-shaped rod (4) out of the arc-shaped sleeve (5). The protruding end of the arc-shaped rod (4) abuts against the outer wall of the wind cup (3), and its abutting end is located on the opposite side when the wind cup (3) rotates.

2. The elementary school science wind direction and speed demonstration teaching aid according to claim 1, characterized in that, The inner top wall of the arc sleeve (5) is provided with an arc-shaped slider (7), and the top of the arc rod (4) is provided with an arc-shaped rail groove (8) that allows the arc-shaped slider (7) to slide along its internal path. The inside of the arc-shaped rail groove (8) is also provided with a damper (9) that works with the shock-absorbing spring (6) to squeeze the arc rod (4) out of the arc sleeve (5).

3. The elementary school science wind direction and speed demonstration teaching aid according to claim 1, characterized in that, The outer walls of the arc rod (4) and the arc-angle slider (7) are both provided with plush rubber plates, and the plush rubber plates are plate-shaped structures with flocked upper surfaces of rubber material.

4. The elementary school science wind direction and speed demonstration teaching aid according to claim 1, characterized in that, One end of the wind cup (3) is also provided with a rotating cylinder (10) that is rotatably connected. The outer wall of the rotating cylinder (10) is provided with a bevel gear (11). The bottom of the contact end of the arc rod (4) is provided with a connecting plate (12). The top of the connecting plate (12) is provided with a half bevel gear (13) that meshes with the bevel gear (11) to make the rotating cylinder (10) rotate in the wind direction.

5. The elementary school science wind direction and speed demonstration teaching aid according to claim 4, characterized in that, The inner diameters of the half-bevel gear (13) and the bevel gear (11) are set at 3:1, so that the rotation range of the rotating drum (10) is ≤30°.

Images