A stereoscopic model of solar apparent motion at all latitudes of the globe

Abstract

The utility model provides a kind of global each latitude solar apparent motion stereoscopic model, belong to solar apparent motion teaching appliance field;Solar apparent motion stereoscopic model includes: upper hemisphere shell and lower hemisphere shell, detachably connect between upper hemisphere shell and lower hemisphere shell, upper hemisphere shell and lower hemisphere shell are transparent material, upper hemisphere shell and lower hemisphere shell are spliced and form transparent sphere;Rotary unit, rotary unit includes pivot, earth model and annular ground;Annular ground is rotatably installed on pivot, the rotation axis of annular ground coincides with the axis of pivot, earth model is fixedly installed on pivot, earth model is located in the inner circle area of annular ground, pivot is fixedly installed in transparent sphere, the ball center of earth model coincides with the ball center of transparent sphere, the axis of pivot passes through the ball center of transparent sphere;By this setting, the problem that existing solar apparent motion stereoscopic model is not rotatable, only demonstrates the solar motion track of certain area is solved.

Description

Technical Field

[0001] This utility model belongs to the field of teaching aids for solar apparent motion, and in particular relates to a three-dimensional model of solar apparent motion at various latitudes around the world. Background Technology

[0002] In the teaching practice of astronomy and geography, the three-dimensional model of the apparent motion of the sun serves as an intuitive teaching tool. It can clearly show the trajectory of the sun in the sky at various latitudes around the world, helping students establish a spatial relationship between the apparent motion of the sun and geographical latitude. This is of great importance for understanding the principles of changes in day and night length and changes in the solar altitude angle.

[0003] However, currently available 3D models of apparent solar motion are non-rotatable and can only statically present the solar trajectory in a specific region. This simplistic approach forces students to passively observe the apparent solar motion under a single latitude, preventing them from actively manipulating the model to intuitively grasp the dynamic changes in the apparent solar motion trajectory across different latitudes. Due to the lack of hands-on operation and interactive experience, students struggle to establish a spatial connection between apparent solar motion and geographical latitude, thus hindering their engagement and understanding of the knowledge.

[0004] In summary, the shortcomings of existing stereoscopic models of apparent solar motion are that they cannot be rotated, only show the solar motion trajectory of a certain region, and cannot show the global apparent solar motion in a single model. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a rotatable three-dimensional model of the apparent motion of the sun;

[0006] To achieve the above and other related objectives, this utility model provides a three-dimensional model of the apparent motion of the sun at various latitudes around the world, the three-dimensional model of the apparent motion of the sun comprising:

[0007] An upper hemisphere and a lower hemisphere are detachably connected. Both the upper and lower hemispheres are made of transparent material and are joined together to form a transparent sphere.

[0008] A rotating assembly includes a rotating shaft, a globe model, and a toroidal ground. The toroidal ground is rotatably mounted on the rotating shaft, and the axis of rotation of the toroidal ground coincides with the axis of the rotating shaft. The globe model is fixedly mounted on the rotating shaft. The inner diameter of the toroidal ground is larger than the diameter of the globe model. The globe model is located within the inner circular region of the toroidal ground. The rotating shaft is fixedly mounted inside a transparent sphere, and the center of the globe model coincides with the center of the transparent sphere. The axis of the rotating shaft passes through the center of the transparent sphere.

[0009] As an optional solution, the solar apparent motion stereo model also includes an annular flange and an annular groove;

[0010] An annular groove communicating with the outer wall of the upper hemisphere is provided on the end face of the upper hemisphere shell.

[0011] An annular flange is provided on the outer side of the end face of the lower hemispherical shell;

[0012] The annular flange is engaged in the annular groove.

[0013] As an optional solution, the solar apparent motion stereo model further includes a first trajectory zone, a second trajectory zone, and a third trajectory zone;

[0014] The third trajectory band is located at the junction of the annular flange and the lower hemispherical shell, the central plane of the third trajectory band is parallel to the end face of the lower hemispherical shell, and the center of the transparent sphere is located on the central plane of the third trajectory band.

[0015] The first trajectory strip is set on the upper hemispherical shell;

[0016] The second track band is set on the lower hemispherical shell;

[0017] The center planes of the first trajectory zone, the second trajectory zone, and the third trajectory zone are parallel to each other.

[0018] As an optional solution, the solar apparent motion stereo model further includes a first semicircular hole, a second semicircular hole, and a first clearance groove;

[0019] Two first semicircular holes are formed through the side wall of the upper hemispherical shell. The two first semicircular holes are respectively located at both ends of the rotating shaft, and the first semicircular holes are connected to the end face of the upper hemispherical shell.

[0020] Two second semicircular holes are formed through the side wall of the lower hemispherical shell. The two second semicircular holes are respectively located at both ends of the rotating shaft. The second semicircular holes are connected to the end face of the lower hemispherical shell, and the axis of the second semicircular hole coincides with the axis of the first semicircular hole.

[0021] The first semicircular hole and the second semicircular hole correspond one-to-one. The first semicircular hole and the second semicircular hole on the same side are paired and form the first rotating shaft mounting channel. The axis of the first rotating shaft mounting channel passes through the center of the transparent sphere.

[0022] The two ends of the rotating shaft are respectively fixedly installed in the two first rotating shaft mounting channels;

[0023] Two first clearance grooves are formed through the side wall of the annular flange. The two first clearance grooves are respectively located at both ends of the rotating shaft. The upper end of the first clearance groove is connected to the upper end face of the annular flange, and the first clearance groove is connected to the second semi-circular hole.

[0024] As an optional solution, the solar apparent motion stereo model also includes a third semicircular hole, a fourth semicircular hole, and a second clearance groove;

[0025] Two third semicircular holes are formed through the side wall of the lower hemisphere shell. The two third semicircular holes are respectively located at both ends of the rotating shaft, and the third semicircular holes are connected to the end face of the lower hemisphere shell.

[0026] Two fourth semicircular holes are formed through the annular flange. The two fourth semicircular holes are respectively located at both ends of the rotating shaft. The axis of the fourth semicircular hole coincides with the axis of the third semicircular hole.

[0027] The third semicircular hole and the fourth semicircular hole correspond one-to-one. The third semicircular hole and the fourth semicircular hole on the same side are paired and form the second rotating shaft mounting channel. The axis of the second rotating shaft mounting channel passes through the center of the transparent sphere.

[0028] The rotating shaft is rotatably mounted in the second rotating shaft mounting channel;

[0029] Two second clearance grooves are formed through the side wall of the upper hemispherical shell. The two second clearance grooves are respectively located at both ends of the rotating shaft. The lower end of the second clearance groove is connected to the end face of the upper hemispherical shell. The second clearance groove is located directly above the rotating shaft.

[0030] As an optional solution, the solar apparent motion stereo model further includes a rectangular limiting block, a first protrusion, a second protrusion, a first rectangular groove, and a second rectangular groove;

[0031] The upper hemispherical shell has two first protrusions inside, and the two first protrusions are symmetrically arranged with respect to the axis of rotation;

[0032] The lower end face of the first protrusion is provided with a first rectangular groove along the axis of rotation; one end of the first rectangular groove is connected to the side wall of the first protrusion near the center of the ball.

[0033] The lower hemispherical shell has two second protrusions inside, and the two second protrusions are symmetrically arranged with respect to the axis of rotation;

[0034] A second rectangular groove is formed on the upper end face of the second protrusion along the axis of rotation; one end of the second rectangular groove is connected to the side wall of the second protrusion that is closer to the center of the sphere.

[0035] The first rectangular groove and the second rectangular groove correspond one-to-one, and the first rectangular groove and the second rectangular groove on the same side combine to form a rectangular limiting groove;

[0036] Rectangular limiting blocks are fixedly installed at both ends of the rotating shaft, and the two rectangular limiting blocks are respectively located in two rectangular limiting grooves.

[0037] As an optional solution, the rotating assembly further includes a first gripper, a second gripper, and an arc-shaped groove;

[0038] The side wall of the first gripper is provided with an arc-shaped slot that passes through both ends of the first gripper;

[0039] The side wall of the second gripper is provided with an arc-shaped slot that passes through both ends of the second gripper;

[0040] The distance between the first gripper and the second gripper is greater than zero and less than the diameter of the rotating shaft;

[0041] The first and second grippers are symmetrically arranged on the lower end surface of the annular ground with the axis of rotation as the axis of symmetry. The arc-shaped grooves of the first gripper and the arc-shaped grooves of the second gripper are arranged opposite each other to form a clamping channel. The axis of rotation coincides with the axis of clamping channel, and the clamping channel and the rotation are in clearance fit.

[0042] As an optional solution, the rotating assembly also includes a counterweight;

[0043] The counterweight can be detachably installed on the lower surface of the annular ground.

[0044] As an optional feature, the solar apparent motion stereo model also includes north-south indicator bars, east-west indicator bars, and a North Star model;

[0045] The north-south indicator bar is arc-shaped and is fixedly installed on the upper surface of the circular ground and located above the Earth model;

[0046] The east-west indicator bar is arc-shaped and is fixedly installed on the upper surface of the circular ground and above the Earth model. The east-west indicator bar and the north-south indicator bar intersect in a cross shape and are fixedly connected.

[0047] The North Star model is located outside the transparent sphere. The North Star model can be detachably installed on the upper or lower hemisphere. The center line of the North Star model passes through the center of the sphere and is perpendicular to the center plane of the third trajectory band. The trajectory of the North Star is located on the center plane of the north-south indicator bar.

[0048] As described above, the three-dimensional model of apparent solar motion at various latitudes worldwide provided by this invention has at least the following beneficial effects:

[0049] 1. This application sets up an Earth model fixedly mounted on a rotating axis, a circular ground detachably mounted on the rotating axis, and the rotating axis fixedly mounted inside a transparent sphere, which allows the circular ground to rotate around the rotating axis relative to the transparent sphere, thereby enabling the three-dimensional model of the apparent motion of the sun to display the global apparent motion trajectory of the sun;

[0050] 2. This application solves the problem of complex assembly and disassembly of the solar apparent motion stereoscopic model and its inconvenience to students' hands-on assembly by setting up a detachable upper hemispherical shell and a detachable circular ground on the rotating shaft. Attached Figure Description

[0051] Figure 1 The diagram shows a three-dimensional structural schematic of Embodiment 1 of the apparent motion three-dimensional model of the sun according to this utility model;

[0052] Figure 2 The image shown is a front view of the annular ground and counterweight of this utility model.

[0053] Figure 3 The diagram shown is an exploded view of the rotating component of this utility model.

[0054] Figure 4 An exploded view of Example 1, which is a stereoscopic model of the apparent motion of the sun;

[0055] Figure 5 Displayed as Figure 4 Enlarged view of point A in the middle;

[0056] Figure 6 An exploded view of Example 2, which is a stereoscopic model of the apparent motion of the sun;

[0057] Figure 7 Displayed as Figure 6 Enlarged view of point B in the middle;

[0058] Figure 8 The diagram shows a three-dimensional structural schematic of the upper hemispherical shell of Example 3, which is a three-dimensional model of the apparent motion of the sun.

[0059] Figure 9 The diagram shows a three-dimensional structural schematic of the lower hemispherical shell of Example 3, which is a three-dimensional model of the apparent motion of the sun.

[0060] Figure 10 The diagram shows a cross-sectional view of Example 3, which is a stereoscopic model of the apparent motion of the sun.

[0061] Figure 11 Displayed as Figure 10 Enlarged view of point C in the middle;

[0062] In the diagram: 1. Upper hemisphere shell, 2. Lower hemisphere shell, 3. Rotating assembly, 4. Annular flange, 5. Annular groove, 6. First track band, 7. Second track band, 8. Third track band, 9. First semicircular hole, 10. Second semicircular hole, 11. First clearance groove, 12. Third semicircular hole, 13. Fourth semicircular hole, 14. Second clearance groove, 15. First protrusion, 16. Second protrusion, 17. First rectangular groove, 18. Second rectangular groove, 19. Rectangular limiting block, 20. First gripper, 21. Second gripper, 22. Arc-shaped slot, 23. North-South indicator bar, 24. East-West indicator bar, 25. North Star model;

[0063] 301. Rotating shaft, 302. Earth model, 303. Circular ground, 304. Counterweight. Detailed Implementation

[0064] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0065] Please see Figures 1 to 11 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0066] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0067] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3 This utility model provides a three-dimensional model of the apparent motion of the sun at various latitudes around the world. The three-dimensional model of the apparent motion of the sun includes:

[0068] The upper hemisphere 1 and the lower hemisphere 2 are detachably connected. Both the upper hemisphere 1 and the lower hemisphere 2 are made of transparent material. The upper hemisphere 1 and the lower hemisphere 2 are spliced ​​together to form a transparent sphere.

[0069] A rotating assembly 3 includes a rotating shaft 301, a globe model 302, and a toroidal surface 303. The toroidal surface 303 is rotatably mounted on the rotating shaft 301, and the axis of rotation of the toroidal surface 303 coincides with the axis of rotation of the rotating shaft 301. The globe model 302 is fixedly mounted on the rotating shaft 301, and the inner diameter of the toroidal surface 303 is larger than the diameter of the globe model 302. The globe model 302 is located within the inner circular area of ​​the toroidal surface 303. The rotating shaft 301 is fixedly mounted inside a transparent sphere, and the center of the globe model 302 coincides with the center of the transparent sphere. The axis of the rotating shaft 301 passes through the center of the transparent sphere.

[0070] Here, the method of fixing the Earth model 302 to the rotating shaft 301 is not limited, and it can be integrally formed;

[0071] Here, the axis of rotation of the annular ground 303 coincides with the axis of rotation of the shaft 301, and the annular ground 303 rotates around the shaft 301 within the transparent sphere;

[0072] This setting solves the problem that the apparent motion 3D model of the sun cannot be rotated, and can only display the sun's motion trajectory in a certain region, instead of displaying the global apparent motion trajectory of the sun in one model.

[0073] In this embodiment, please refer to Figure 8 and Figure 9 The solar apparent motion stereo model also includes an annular flange 4 and an annular groove 5;

[0074] An annular groove 5 communicating with the outer wall of the upper hemisphere shell 1 is provided on the end face of the upper hemisphere shell 1.

[0075] An annular flange 4 is provided on the outer side of the end face of the lower hemispherical shell 2;

[0076] The annular flange 4 is inserted into the annular groove 5;

[0077] With this setup, the upper hemisphere 1 and the lower hemisphere 2 can be quickly assembled and disassembled without tools: simply align the annular flange 4 with the annular groove 5 and press it in lightly to form a stable mechanical connection. This tool-free snap-fit ​​structure not only greatly simplifies the model assembly process, but also makes it easier for students to independently disassemble and reassemble the spheres in class, effectively improving the convenience and interactivity of hands-on operation.

[0078] In this embodiment, please refer to Figure 1and Figure 4 The solar apparent motion stereo model also includes a first trajectory band 6, a second trajectory band 7, and a third trajectory band 8;

[0079] The third track band 8 is located at the junction of the annular flange 4 and the lower hemispherical shell 2. The central plane of the third track band 8 is parallel to the end face of the lower hemispherical shell 2. The center of the transparent sphere is located on the central plane of the third track band 8.

[0080] The first track band 6 is disposed on the upper hemispherical shell 1;

[0081] The second track band 7 is disposed on the lower hemispherical shell 2;

[0082] The center planes of the first trajectory band 6, the second trajectory band 7, and the third trajectory band 8 are parallel to each other;

[0083] Here, the distance from the center plane of the first trajectory band 6 to the center plane of the third trajectory band 8 is equal to the distance from the center plane of the second trajectory band 7 to the center plane of the third trajectory band 8;

[0084] Here, the first trajectory band 6 can be a colored ring band fitted on the upper hemispherical shell 1, or it can be a circular trajectory drawn on the upper hemispherical shell 1.

[0085] Here, the second track band 7 can be a colored ring band fitted on the lower hemispherical shell 2, or it can be a circular track drawn on the lower hemispherical shell 2;

[0086] Here, the third trajectory band 8 is located on the lower hemispherical shell 2. The third trajectory band 8 can be a colored ring band fitted on the lower hemispherical shell 2, or it can be a circular trajectory drawn on the lower hemispherical shell 2.

[0087] Here, a uniformly distributed scale mark is set on the first track band 6, the second track band 7, and the third track band 8;

[0088] With this setup, the first trajectory band 6 can represent the sun's trajectory at the summer solstice, the second trajectory band 7 can represent the sun's trajectory at the winter solstice, and the third trajectory band 8 can represent the sun's trajectory at the spring or autumn equinox. By rotating the transparent sphere, the first trajectory band 6, the second trajectory band 7, and the third trajectory band 8 can be rotated accordingly, thus displaying the sun's trajectory at three different times in different regions. This allows students to visually compare the differences in the sun's trajectory at the same location in different seasons and to deeply understand the intrinsic connection between the movement of the sun's direct point and the changes in the length of day and night.

[0089] In this embodiment, please refer to Figure 4 and Figure 5The solar apparent motion stereo model also includes a first semicircular hole 9, a second semicircular hole 10, and a first clearance groove 11;

[0090] Two first semicircular holes 9 are formed through the side wall of the upper hemispherical shell 1. The two first semicircular holes 9 are respectively located at both ends of the rotating shaft 301. The first semicircular holes 9 are connected to the end face of the upper hemispherical shell 1.

[0091] Two second semicircular holes 10 are formed through the side wall of the lower hemispherical shell 2. The two second semicircular holes 10 are respectively located at both ends of the rotating shaft 301. The second semicircular holes 10 are connected to the end face of the lower hemispherical shell 2. The axis of the second semicircular hole 10 coincides with the axis of the first semicircular hole 9.

[0092] The first semicircular hole 9 and the second semicircular hole 10 correspond one-to-one. The first semicircular hole 9 and the second semicircular hole 10 on the same side are paired and form a first rotating shaft mounting channel. The axis of the first rotating shaft mounting channel passes through the center of the transparent sphere.

[0093] The two ends of the rotating shaft 301 are respectively fixedly installed in the two first rotating shaft mounting channels;

[0094] Two first clearance grooves 11 are formed through the side wall of the annular flange 4. The two first clearance grooves 11 are respectively set at both ends of the rotating shaft 301. The upper end of the first clearance groove 11 is connected to the upper end face of the annular flange 4. The first clearance groove 11 is connected to the second semi-circular hole 10.

[0095] Here, as Figure 4 The embodiment shown is Embodiment 1 of this utility model. One end of the rotating shaft 301 is placed in one of the first semicircular holes 9 through one of the first clearance grooves 11, and the other end of the rotating shaft 301 is placed in another first semicircular hole 9 through another first clearance groove 11. Hot melt adhesive is used on both ends of the rotating shaft 301 to fix both ends of the rotating shaft 301 in the first semicircular holes 9 respectively. At this time, the upper hemisphere shell 1 and the lower hemisphere shell 2 are fastened together, and the two second semicircular holes 10 limit the two ends of the rotating shaft 301.

[0096] In this embodiment, please refer to Figure 6 and Figure 7 The solar apparent motion stereo model also includes a third semicircular hole 12, a fourth semicircular hole 13, and a second clearance groove 14;

[0097] Two third semicircular holes 12 are provided through the side wall of the lower hemispherical shell 2. The two third semicircular holes 12 are respectively provided at both ends of the rotating shaft 301. The third semicircular holes 12 are connected to the end face of the lower hemispherical shell 2.

[0098] Two fourth semicircular holes 13 are provided through the annular flange 4. The two fourth semicircular holes 13 are respectively provided at both ends of the rotating shaft 301. The axis of the fourth semicircular hole 13 coincides with the axis of the third semicircular hole 12.

[0099] The third semicircular hole 12 and the fourth semicircular hole 13 correspond one-to-one. The third semicircular hole 12 and the fourth semicircular hole 13 on the same side are paired and form a second rotating shaft mounting channel. The axis of the second rotating shaft mounting channel passes through the center of the transparent sphere.

[0100] The rotating shaft 301 is rotatably mounted in the second rotating shaft mounting channel;

[0101] Two second clearance grooves 14 are provided through the side wall of the upper hemispherical shell 1. The two second clearance grooves 14 are respectively provided at both ends of the rotating shaft 301. The lower end of the second clearance groove 14 is connected to the end face of the upper hemispherical shell 1. The second clearance groove 14 is located directly above the rotating shaft 301.

[0102] Here, in embodiment 2, the second clearance groove 14 is semi-circular, the diameter of the second clearance groove 14 is greater than or equal to the diameter of the rotating shaft 301, and the axis of the second clearance groove 14 coincides with the axis of the second rotating shaft mounting channel;

[0103] Here, as Figure 6 The embodiment shown is Embodiment 2 of this utility model. The lower hemisphere shell 2 is made of a deformable material. The lower hemisphere shell 2 is deformed by squeezing, and then the two ends of the rotating shaft 301 are slid into the two second rotating shaft mounting channels respectively. Then, the rotating shaft 301 is fixed in the second rotating shaft 301 channel by hot melt adhesive. After the upper hemisphere shell 1 and the lower hemisphere shell 2 are fastened together, the rotating shaft 301 is fixedly installed in the transparent sphere.

[0104] In this embodiment, please refer to Figure 8 , Figure 9 , Figure 10 and Figure 11 The solar apparent motion stereo model also includes a rectangular limiting block 19, a first protrusion 15, a second protrusion 16, a first rectangular groove 17, and a second rectangular groove 18.

[0105] The upper hemispherical shell 1 is provided with two first protrusions 15 inside, and the two first protrusions 15 are symmetrically arranged with respect to the rotating shaft 301;

[0106] The lower end face of the first protrusion 15 is provided with a first rectangular groove 17 along the axis of the rotating shaft 301; one end of the first rectangular groove 17 is connected to the side wall of the first protrusion 15 near the center of the ball.

[0107] The lower hemispherical shell 2 is provided with two second protrusions 16 inside, and the two second protrusions 16 are symmetrically arranged with respect to the rotating shaft 301;

[0108] The upper end face of the second protrusion 16 is provided with a second rectangular groove 18 along the axis of the rotating shaft 301; one end of the second rectangular groove 18 is connected to the side wall of the second protrusion 16 that is closer to the center of the sphere.

[0109] The first rectangular groove 17 and the second rectangular groove 18 correspond one-to-one, and the first rectangular groove 17 and the second rectangular groove 18 on the same side are combined to form a rectangular limiting groove.

[0110] Rectangular limiting blocks 19 are fixedly installed at both ends of the rotating shaft 301, and the two rectangular limiting blocks 19 are respectively located in two rectangular limiting grooves;

[0111] Here, the fixed installation method of the rectangular limiting block 19 is not limited. It can be connected by thread or it can be integrally formed with the rotating shaft 301.

[0112] Here, has Figure 8 The upper hemispherical shell 1 shown and having Figure 9 The solar apparent motion stereoscopic model of the lower hemisphere shell 2 shown is embodiment 3 of this utility model. First, the rectangular limiting blocks 19 at both ends of the rotating shaft 301 are placed in the two first rectangular grooves 17 respectively. Then, the upper hemisphere shell 1 and the lower hemisphere shell 2 are fastened together to form a rectangular limiting groove. The gap between the rectangular limiting block 19 and the rectangular limiting groove is 0. The rectangular limiting groove prevents the rotation and displacement of the rectangular limiting block 19, thereby fixing the rotating shaft 301 on the transparent sphere.

[0113] By fastening the upper hemisphere shell 1 and the lower hemisphere shell 2 to form a rectangular limiting groove, the rotating shaft 301 is limited, preventing the rotating shaft 301 from rotating. This avoids the need to fix the rotating shaft 301 with hot melt glue, making the installation process of the solar apparent motion stereoscopic model simpler and easier for students to operate.

[0114] In this embodiment, please refer to Figure 2 and Figure 3 The rotating assembly 3 also includes a first gripper 20, a second gripper 21, and an arc-shaped slot 22;

[0115] The side wall of the first gripper 20 is provided with an arc-shaped slot 22 that passes through both ends of the first gripper 20;

[0116] The side wall of the second gripper 21 is provided with an arc-shaped slot 22 that passes through both ends of the second gripper 21;

[0117] The distance between the first gripper 20 and the second gripper 21 is greater than zero and less than the diameter of the rotating shaft 301;

[0118] The first gripper 20 and the second gripper 21 are symmetrically arranged on the lower end surface of the annular ground 303 with the axis of rotation 301 as the axis of symmetry. The arc-shaped groove 22 of the first gripper 20 and the arc-shaped groove 22 of the second gripper 21 are arranged opposite to each other to form a clamping channel. The axis of rotation 301 coincides with the axis of clamping channel. The clamping channel and rotation 301 are in clearance fit.

[0119] Here, both the first gripper 20 and the second gripper 21 are made of deformable material. The rotating shaft 301 is initially positioned directly above the gap between the first gripper 20 and the second gripper 21. At this point, the rotating shaft 301 is pressed downwards, causing the first gripper 20 and the second gripper 21 to deform, thereby making the distance between the first gripper 20 and the second gripper 21 greater than the diameter of the rotating shaft 301. At this point, the rotating shaft 301 is pressed into the clamping channel. After the rotating shaft 301 enters the clamping channel, the first gripper 20 and the second gripper 21 return to their original state, making the distance between the first gripper 20 and the second gripper 21 less than the diameter of the rotating shaft 301 to prevent the rotating shaft 301 from disengaging from the clamping channel. The annular ground 303, through a gap fit with the clamping channel, allows the annular ground 303 to rotate on and around the rotating shaft 301.

[0120] This design allows for a detachable connection between the rotating shaft 301 and the circular ground 303, resulting in a simple structure that is easy for students to operate and disassemble.

[0121] In this embodiment, please refer to Figure 2 and Figure 3 The rotating assembly 3 also includes a counterweight 304;

[0122] The counterweight 304 can be detachably installed on the lower surface of the annular ground 303;

[0123] Here, the installation method of the counterweight 304 is not limited; it can be magnetic, snap-fit, or connected by a sliding groove.

[0124] This setup ensures that the counterweight 304 can be easily disassembled and assembled while balancing the center of gravity of the annular ground 303. When the transparent sphere is rotated to simulate the solar illumination trajectory in different regions, the counterweight 304 keeps the annular ground 303 in a horizontal position, preventing the annular ground 303 from tilting due to the rotation of the transparent sphere and thus affecting the observation effect.

[0125] Here, the rotating component 3 also includes an annular iron sheet, and a counterweight mounting groove is provided on the upper surface of the middle part of the counterweight 304. The annular iron sheet can be disassembled and installed in the counterweight mounting groove by screws.

[0126] With this setting, when the weight of the counterweight 304 itself is insufficient to maintain the balance of the annular ground 303, an annular iron piece can be added into the counterweight mounting slot to flexibly adjust the weight of the counterweight 304, further improving the balance stability of the annular ground 303 and ensuring that the annular ground 303 always maintains a horizontal reference.

[0127] In this embodiment, please refer to Figure 3 and Figure 10 The solar apparent motion stereo model also includes a north-south indicator bar 23, an east-west indicator bar 24, and a North Star model 25;

[0128] The north-south indicator bar 23 is arc-shaped and is fixedly installed on the upper surface of the circular ground 303 and located above the earth model 302.

[0129] The east-west indicator bar 24 is arc-shaped and is fixedly installed on the upper surface of the circular ground 303 and located above the earth model 302. The east-west indicator bar 24 and the north-south indicator bar 23 intersect and are fixedly connected.

[0130] The North Star model 25 is located outside the transparent sphere. The North Star model 25 can be detachably installed on the upper hemisphere shell 1 or the lower hemisphere shell 2. The center line of the North Star model 25 passes through the center of the sphere and is perpendicular to the center plane of the third track band 8. The movement trajectory of the North Star model 25 is located on the center plane of the north-south indicator strip 23.

[0131] Here, the method of detachable installation of the Polaris model 25 is not limited; it can be inserted by interference fit or by threaded connection.

[0132] In this embodiment 1-3, the North Star model 25 is detachably mounted on the upper hemispherical shell 1 by an interference fit. The upper hemispherical shell 1 has a North Star mounting hole. The axis of the North Star mounting hole is perpendicular to the annular ground 303 and passes through the center of the transparent sphere. One end of the North Star model 25 is provided with a cylindrical mounting post. The diameter of the cylindrical mounting post is larger than the diameter of the North Star mounting hole. The cylindrical mounting post is inserted into the North Star mounting hole and has an interference fit with the North Star mounting hole.

[0133] With this setup, when displaying the sun's trajectory in different regions and rotating the transparent sphere, students can intuitively establish the correspondence between the sun's trajectory and geographical location by observing the spatial position of the North Star model 25 and combining it with the north-south indicator bar 23 and the east-west indicator bar 24. This allows them to accurately determine the southeast, northwest, and south directions of any latitude region, effectively enhancing the teaching effect of spatial orientation.

[0134] In summary, this utility model, through the provision of an Earth model 302 fixedly mounted on a rotating shaft 301 and a circular ground 303 detachably mounted on the rotating shaft 301, with the rotating shaft 301 fixedly mounted inside a transparent sphere, allows the circular ground 303 to rotate around the rotating shaft 301 relative to the transparent sphere, thereby enabling the solar apparent motion stereoscopic model to display the global solar apparent motion trajectory. Furthermore, the detachable connection between the upper hemisphere shell 1 and the lower hemisphere shell 2, along with the detachable mounting of the circular ground 303 on the rotating shaft 301, allows the solar apparent motion stereoscopic model to rotate while also being easily assembled and disassembled, solving the problem of complex assembly and disassembly of solar apparent motion stereoscopic models, which is inconvenient for students' hands-on assembly.

[0135] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A three-dimensional model of the apparent motion of the sun at various latitudes around the world, characterized in that, The solar apparent motion stereo model includes: An upper hemisphere and a lower hemisphere are detachably connected. Both the upper and lower hemispheres are made of transparent material and are joined together to form a transparent sphere. A rotating assembly includes a rotating shaft, a globe model, and a toroidal ground. The toroidal ground is rotatably mounted on the rotating shaft, and the axis of rotation of the toroidal ground coincides with the axis of the rotating shaft. The globe model is fixedly mounted on the rotating shaft. The inner diameter of the toroidal ground is larger than the diameter of the globe model. The globe model is located within the inner circular region of the toroidal ground. The rotating shaft is fixedly mounted inside a transparent sphere, and the center of the globe model coincides with the center of the transparent sphere. The axis of the rotating shaft passes through the center of the transparent sphere. The solar apparent motion stereo model also includes an annular flange and an annular groove; An annular groove communicating with the outer wall of the upper hemisphere is provided on the end face of the upper hemisphere shell. An annular flange is provided on the outer side of the end face of the lower hemispherical shell; The annular flange is engaged in the annular groove; The solar apparent motion stereo model also includes a first trajectory zone, a second trajectory zone, and a third trajectory zone; The third trajectory band is located at the junction of the annular flange and the lower hemispherical shell, the central plane of the third trajectory band is parallel to the end face of the lower hemispherical shell, and the center of the transparent sphere is located on the central plane of the third trajectory band. The first trajectory strip is set on the upper hemispherical shell; The second track band is set on the lower hemispherical shell; The center planes of the first trajectory zone, the second trajectory zone, and the third trajectory zone are parallel to each other.

2. A three-dimensional model of the apparent motion of the sun at various latitudes worldwide according to claim 1, characterized in that, The solar apparent motion stereo model also includes a first semicircular hole, a second semicircular hole, and a first clearance groove; Two first semicircular holes are formed through the side wall of the upper hemispherical shell. The two first semicircular holes are respectively located at both ends of the rotating shaft, and the first semicircular holes are connected to the end face of the upper hemispherical shell. Two second semicircular holes are formed through the side wall of the lower hemispherical shell. The two second semicircular holes are respectively located at both ends of the rotating shaft. The second semicircular holes are connected to the end face of the lower hemispherical shell, and the axis of the second semicircular hole coincides with the axis of the first semicircular hole. The first semicircular hole and the second semicircular hole correspond one-to-one. The first semicircular hole and the second semicircular hole on the same side are paired and form the first rotating shaft mounting channel. The axis of the first rotating shaft mounting channel passes through the center of the transparent sphere. The two ends of the rotating shaft are respectively fixedly installed in the two first rotating shaft mounting channels; Two first clearance grooves are formed through the side wall of the annular flange. The two first clearance grooves are respectively located at both ends of the rotating shaft. The upper end of the first clearance groove is connected to the upper end face of the annular flange, and the first clearance groove is connected to the second semi-circular hole.

3. A three-dimensional model of the apparent motion of the sun at various latitudes worldwide according to claim 1, characterized in that, The solar apparent motion stereo model also includes a third semicircular hole, a fourth semicircular hole, and a second clearance groove; Two third semicircular holes are formed through the side wall of the lower hemisphere shell. The two third semicircular holes are respectively located at both ends of the rotating shaft, and the third semicircular holes are connected to the end face of the lower hemisphere shell. Two fourth semicircular holes are formed through the annular flange. The two fourth semicircular holes are respectively located at both ends of the rotating shaft. The axis of the fourth semicircular hole coincides with the axis of the third semicircular hole. The third semicircular hole and the fourth semicircular hole correspond one-to-one. The third semicircular hole and the fourth semicircular hole on the same side are paired and form the second rotating shaft mounting channel. The axis of the second rotating shaft mounting channel passes through the center of the transparent sphere. The rotating shaft is rotatably mounted in the second rotating shaft mounting channel; Two second clearance grooves are formed through the side wall of the upper hemispherical shell. The two second clearance grooves are respectively located at both ends of the rotating shaft. The lower end of the second clearance groove is connected to the end face of the upper hemispherical shell. The second clearance groove is located directly above the rotating shaft.

4. A three-dimensional model of the apparent motion of the sun at various latitudes worldwide according to claim 1, characterized in that, The solar apparent motion stereo model also includes a rectangular limiting block, a first protrusion, a second protrusion, a first rectangular groove, and a second rectangular groove; The upper hemispherical shell has two first protrusions inside, and the two first protrusions are symmetrically arranged with respect to the axis of rotation; The lower end face of the first protrusion is provided with a first rectangular groove along the axis of rotation; one end of the first rectangular groove is connected to the side wall of the first protrusion near the center of the ball. The lower hemispherical shell has two second protrusions inside, and the two second protrusions are symmetrically arranged with respect to the axis of rotation; A second rectangular groove is formed on the upper end face of the second protrusion along the axis of rotation; one end of the second rectangular groove is connected to the side wall of the second protrusion that is closer to the center of the sphere. The first rectangular groove and the second rectangular groove correspond one-to-one, and the first rectangular groove and the second rectangular groove on the same side combine to form a rectangular limiting groove; Rectangular limiting blocks are fixedly installed at both ends of the rotating shaft, and the two rectangular limiting blocks are respectively located in two rectangular limiting grooves.

5. A three-dimensional model of the apparent motion of the sun at various latitudes worldwide according to claim 1, characterized in that, The rotating assembly also includes a first gripper, a second gripper, and an arc-shaped groove; The side wall of the first gripper is provided with an arc-shaped slot that passes through both ends of the first gripper; The side wall of the second gripper is provided with an arc-shaped slot that passes through both ends of the second gripper; The distance between the first gripper and the second gripper is greater than zero and less than the diameter of the rotating shaft; The first and second grippers are symmetrically arranged on the lower end surface of the annular ground with the axis of rotation as the axis of symmetry. The arc-shaped grooves of the first gripper and the arc-shaped grooves of the second gripper are arranged opposite each other to form a clamping channel. The axis of rotation coincides with the axis of clamping channel, and the clamping channel and the rotation are in clearance fit.

6. A three-dimensional model of the apparent motion of the sun at various latitudes worldwide according to claim 1, characterized in that, The rotating assembly also includes a counterweight; The counterweight can be detachably installed on the lower surface of the annular ground.

7. A three-dimensional model of the apparent motion of the sun at various latitudes worldwide according to claim 1, characterized in that, The solar apparent motion stereo model also includes north-south indicator bars, east-west indicator bars, and a North Star model; The north-south indicator bar is arc-shaped and is fixedly installed on the upper surface of the circular ground and located above the Earth model; The east-west indicator bar is arc-shaped and is fixedly installed on the upper surface of the circular ground and above the Earth model. The east-west indicator bar and the north-south indicator bar intersect and are fixedly connected. The North Star model is located outside the transparent sphere and can be detachably installed on the upper or lower hemisphere shell. The center line of the North Star model passes through the center of the sphere and is perpendicular to the center plane of the third trajectory zone. The trajectory of the North Star is located on the center plane of the north-south indicator bar.

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