Earth around-the-sun revolution instrument with invariable earth axis direction

Abstract

The utility model provides an earth around-the-sun revolution instrument with an invariable earth axis direction. The earth around-the-sun revolution instrument comprises a globe, an ecliptic turntable, a central shaft body and a perpendicular incidence plane disc, the globe comprises an earth model, an earth axis and a base. The base is rotationally connected with the ecliptic turntable through a bearing piece and is in transmission connection with the central shaft body through a transmission belt; the globe and the ecliptic turntable can be driven by external force to do revolution motion along the central shaft body; the direct plane disc is used for simulating a direct point of the sun to the globe and is arranged at the top of the central shaft body; when the globe revolves, the direction of the earth axis is not changed, and the perpendicular incidence point reciprocates between the south and north return lines of the earth model. The terrestrial globe is in transmission connection with the central shaft body through a transmission belt to form a planetary belt transmission mechanism, so that the revolution motion is ensured, the earth axis direction is maintained to be constant, the knowledge error of earth axis deviation during revolution of a traditional teaching aid is corrected, and the annual movement rule of a direct solar radiation point between south and north return lines is accurately reproduced.

Description

[Technical Field]

[0001] This utility model relates to the field of teaching aids technology, specifically to an instrument that allows the Earth to revolve around the Sun with its axis pointing in a constant direction. [Background Technology]

[0002] The Earth Orbiting the Sun Instrument is an educational tool that demonstrates the Earth's motion around the Sun through physical models or digital simulations. By making abstract theories concrete, this tool effectively lowers the learning threshold and is especially suitable for introductory Earth science and astronomy courses in primary and secondary schools. It is an important tool for bridging textbook knowledge with real-world phenomena.

[0003] Currently available Earth-Sun orbiters include those with ecliptic plane, solar model, and 200' Earth model. These orbiters present the following technical problems: Firstly, (refer to the appendix...) Figures 10-13 As shown, the Earth model 200' deviates in the direction of its axis 201' during its revolution (e.g., the axis 201' cannot maintain its pointing direction towards Polaris when it reaches different orbital positions), contradicting the astronomical principle that the Earth's axis should always point in the same direction. This leads to an erroneous "synchronous rotation of the Earth's axis" trajectory during the demonstration of seasonal changes. Secondly, the direct sunlight simulated by the solar model cannot accurately correspond to the Tropic of Cancer and Tropic of Capricorn on the surface of the Earth model 200', making it impossible to accurately represent the periodic movement of the direct sunlight point between the Tropic of Cancer and Tropic of Capricorn, resulting in a distorted demonstration. These problems render the existing Earth orbiting device a factual error in demonstrating the Earth's revolution, violating basic geographical principles.

[0004] In view of this, this case involves in-depth research into the aforementioned issues, which led to the formation of this case. [Utility Model Content]

[0005] This invention aims to solve the technical problem of factual errors in existing Earth orbiting instruments by providing an Earth orbiting instrument with a constant Earth axis orientation, ensuring revolution while maintaining a constant Earth axis orientation, correcting the factual errors of Earth axis deviation in traditional teaching aids, and accurately reproducing the annual movement of the sun's direct point between the Tropic of Cancer and the Tropic of Capricorn.

[0006] This invention is implemented as follows: an instrument for the Earth's revolution around the Sun with a fixed Earth axis orientation, comprising a globe, an ecliptic disk, a central axis, and a direct-light plane; the globe includes an Earth model, an Earth axis, and a base; the base is rotatably connected to the ecliptic disk via bearing components, and the base is drive-connected to the central axis via a transmission belt; the globe and the ecliptic disk can revolve around the Sun along the central axis under the drive of an external force; the direct-light plane is used to simulate the point where the Sun shines directly on the globe and is located at the top of the central axis; during the globe's revolution, the Earth's axis orientation remains unchanged, always pointing towards Polaris, and the point of direct light can move back and forth between the Tropic of Cancer and the Tropic of Capricorn on the Earth model.

[0007] Further, the bearing piece comprises a bearing inner ring and a bearing outer ring, the bearing inner ring is fixedly connected with the ecliptic turntable, and the bearing outer ring is rotationally connected with the bearing inner ring; the base comprises an upper clamping seat and a lower fixed ring; the lower fixed ring is fixedly connected with the bearing outer ring, and the upper clamping seat and the lower fixed ring are clamped.

[0008] Further, the transmission belt is arranged on the central shaft body and the outer wall of the lower fixed ring; the central shaft body and the lower fixed ring have the same diameter.

[0009] Further, the outer wall of the central shaft body is formed with a first groove, the outer wall of the lower fixed ring is formed with a second groove, and the first groove and the second groove are connected through the transmission belt.

[0010] Further, the first groove and the second groove are at the same horizontal height and have the same diameter.

[0011] Further, the direct point of the direct plane disc and the center of the earth model are always at the same horizontal height.

[0012] Further, the direct plane disc is sequentially provided with a first indication mark, a second indication mark, a third indication mark and a fourth indication mark; the first indication mark, the second indication mark, the third indication mark and the fourth indication mark are distributed in a circumferential array with the center of the direct plane disc as the center.

[0013] Further, the direct plane disc is circumferentially provided with a plurality of laser emitters directed to the globe.

[0014] Further, the number of the laser emitters is four, and the laser emitters are one-to-one correspondingly arranged with the first indication mark, the second indication mark, the third indication mark and the fourth indication mark.

[0015] Further, the utility model also comprises a platform, the bottom of the central shaft body is fixedly connected with the upper surface of the platform, the ecliptic turntable is located above the platform, and the ecliptic turntable is rotationally connected with the platform through a rotating mechanism.

[0016] The utility model has the advantages of:

[0017] 1. The globe is transmissionally connected with the central shaft body through the transmission belt, a "planetary belt transmission mechanism" is formed, the constant pointing of the earth axis (always towards the vicinity of the north star) is maintained while the revolution movement is ensured, and the knowledge error of the traditional teaching aid that the earth axis deviates during revolution is corrected.

[0018] 2. The sun direct point is always moved between the tropics during simulation in the revolution process through the dynamic cooperation of the direct plane disc and the globe, the annual movement rule of the sun direct point between the tropics is accurately reproduced, and the accuracy of the astronomical phenomenon demonstration is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further explained in connection with the embodiments with reference to the drawings.

[0020] Figure 1 is the structure schematic diagram of the earth revolves around the sun instrument in the utility model.

[0021] Figure 2 is the structure schematic front view of the ecliptic turntable in the utility model.

[0022] Figure 3 is the connection structure schematic diagram of the lower fixed ring and bearing piece in the utility model.

[0023] Figure 4 is the connection structure schematic diagram of the globe and bearing piece in the utility model.

[0024] Figure 5 is the structure schematic diagram of the direct plane disc in the utility model.

[0025] Figure 6 is the structure schematic diagram of the direct north circle in the utility model in the simulation summer solstice.

[0026] Figure 7 is the structure schematic diagram of the direct equator in the utility model in the simulation autumnal equinox.

[0027] Figure 8 is the structure schematic diagram of the direct south circle in the utility model in the simulation winter solstice.

[0028] Figure 9 is the structure schematic diagram of the direct equator in the utility model in the simulation spring equinox.

[0029] Figure 10 is one of the revolution state diagram of prior art earth revolves around the sun instrument.

[0030] Figure 11 is the revolution state diagram two of prior art earth revolves around the sun instrument.

[0031] Figure 12 is the revolution state diagram three of prior art earth revolves around the sun instrument.

[0032] Figure 13 is the revolution state diagram four of prior art earth revolves around the sun instrument.

[0033] REFERENCE SIGNS:

[0034] Earth revolves around the sun instrument 100, globe 1, globe model 11, north 111, equator 112, south 113, the earth axis 12, base 13, upper card seat 131, lower fixed ring 132, second recess 133, card ring 134, fixed frame 14, ecliptic turntable 2, central shaft body 3, straight plane disc 4, first indication mark 41, second indication mark 42, third indication mark 43, fourth indication mark 44, bearing 5, transmission belt 6, platform 7, laser emitter 8.

CONCRETE EMBODIMENT

[0035] In order to better understand the technical scheme of the utility model, the technical scheme of the utility model will be explained in detail below in combination with the drawings of the specification and specific embodiments.

[0036] Please refer to Figures 1 to 9 The utility model provides a kind of globe revolves around the sun instrument 100 of invariable earth axis direction, including globe 1, ecliptic turntable 2, central shaft body 3 and straight plane disc 4.The globe 1 includes globe model 11, the earth axis 12 of fixed globe model 11, and base 13, the base 13 is rotatably connected with ecliptic turntable 2 by bearing 5, and base 13 is drivingly connected with central shaft body 3 by transmission belt 6;The ecliptic turntable 2 and globe 1 can be driven by external force and make revolution around central shaft body 3;The straight plane disc 4 is used to simulate the straight point of sun to globe 1 and is located at the top of central shaft body 3, and the earth axis 12 is always directed to north star when revolving, and the straight point can reciprocate between the north and south of globe model 11.The central shaft body 3 is stationary during the revolution of globe 1, and globe 1, central shaft body 3 and transmission belt 6 form a "planetary belt drive mechanism".The included angle between the earth axis 12 and ecliptic turntable 2 is 66 ° 34', by accurately setting the included angle to 66 ° 34' (complementary angle 23 ° 26'), the authenticity of astronomical parameter simulation is ensured.

[0037] The globe revolves around the sun instrument 100 of the utility model is used for demonstrating that globe revolves around sun as teaching instrument, with the following beneficial technical effects:

[0038] 1, globe 1 is drivingly connected with central shaft body 3 by transmission belt 6, and forms a "planetary belt drive mechanism", which maintains the constant direction of earth axis 12 (always directed to north star) while ensuring revolution, and corrects the knowledge error of earth axis deviation during revolution of traditional teaching aid.

[0039] 2, the straight point of sun simulated during revolution is always moved between the north and south by the dynamic cooperation of straight plane disc 4 and globe 1, and by using the same diameter characteristics of central shaft body 3 and lower fixed ring 132, the annual movement law of the straight point of sun between the north and south is accurately reproduced, and the accuracy of astronomical phenomenon demonstration is ensured.

[0040] In this invention, the bearing component 5 includes an inner bearing ring 51 and an outer bearing ring 52. The inner bearing ring 51 is fixedly connected to the ecliptic disk 2, and the outer bearing ring 52 is rotatably connected to the inner bearing ring 51 via ball bearings. The bearing component 5 is existing technology. The base 13 includes an upper retaining seat 131 and a lower fixing ring 132. The lower fixing ring 132 is fixedly connected to the outer bearing ring 52. The upper retaining seat 131 and the lower fixing ring 132 engage to achieve a detachable connection between the globe 1 and the ecliptic disk 2. The globe 1 is existing technology and can be obtained through procurement. By designing the lower fixing ring 132 to be fixedly connected to the outer bearing ring 52, and because the upper retaining seat 131 and the lower fixing ring 132 of the globe 1 are engaged and fixed, the globe 1 and the outer bearing ring 52 become an integral structure during revolution, and no relative rotation occurs between them. This allows the globe 1, the central shaft 3, and the transmission belt 6 to form a "planetary belt transmission mechanism".

[0041] In this utility model, the lower fixing ring 132 is formed with a retaining ring 134, and the upper retaining seat 131 is formed with a retaining groove for engaging with the retaining ring 134.

[0042] In this invention, the transmission belt 6 is wound around the outer wall of the central shaft 2 and the lower fixed ring 132; the central shaft 2 and the lower fixed ring 132 have the same diameter. The same diameter allows the central shaft 2 and the lower fixed ring 132 to achieve a 1:1 transmission ratio, ensuring that the revolution period and the rotation period correspond precisely.

[0043] In this invention, a first groove is formed on the outer wall of the central shaft 2, and a second groove 133 is formed on the outer wall of the lower fixing ring 132. The first groove and the second groove 133 are connected by a transmission belt 6. The double-groove structure prevents the transmission belt 6 from slipping, ensuring the accuracy of the revolution cycle demonstration.

[0044] In this invention, the first groove and the second groove 132 are at the same horizontal height and have the same diameter. This level design prevents the transmission belt from slipping, avoids transmission torque deviation, and ensures the accuracy of the revolution cycle demonstration.

[0045] In this invention, the direct point of the direct-lighting plane 4 and the center of the Earth model 11 are always at the same horizontal level. This design, which ensures the direct point is at the same height as the Earth model 11, guarantees that the simulated direct point is always perpendicular to the surface contact point of the Earth model 11, significantly improving the accuracy of the direct point position determination.

[0046] In the utility model, the straight plane disc 4 is sequentially provided with a first indication mark 41, a second indication mark 42, a third indication mark 43 and a fourth indication mark 44; the first indication mark 41, the second indication mark 42, the third indication mark 43 and the fourth indication mark 44 are distributed in a circumferential array with the center of the straight plane disc 4 as the center. The four indication marks can correspond to the four seasons of spring equinox, summer solstice, autumnal equinox and winter solstice respectively, the visual correlation between the space orientation and the time node is established, the abstract astronomical concept is innovatively converted into the concrete seasonal concept, and the earth revolution around the sun apparatus is more vivid and image.

[0047] Reference is made to the accompanying drawings Figures 6-9 As shown in the drawings, as a specific embodiment: when the globe 1 revolves, the initial first indication mark 41 points to the tropic of Cancer 111, and at this time, the summer solstice is corresponded; the ecliptic turntable 2 is manually driven to rotate counterclockwise by 90°, the second indication mark 42 points to the equator 112, and at this time, the autumnal equinox is corresponded; the ecliptic turntable 2 is manually driven to rotate counterclockwise by 90° again, the third indication mark 43 points to the tropic of Capricorn 113, and at this time, the winter solstice is corresponded; the ecliptic turntable 2 is manually driven to rotate counterclockwise by 90° again, the fourth indication mark 44 points to the equator 112, and at this time, the spring equinox is corresponded; after the ecliptic turntable 2 is manually driven to rotate counterclockwise by 90° again, the first indication mark 41 points to the tropic of Cancer 111 again, and the revolution of one week is completed, and in the process, the earth axis 12 of the globe 1 always points to the vicinity of the North Star. The specific embodiment provides a visual seasonal indication system, so that the spatial cognitive relationship between the revolution orbit position and the specific seasonal equinox can be established in the teaching process, and the teaching content is more vivid and image. It should be noted that in the initial state, the first indication mark 41 can also point to the equator 112, and the spring equinox is corresponded; or point to the tropic of Capricorn 113, and the winter solstice is corresponded; the above specific embodiment only exemplifies one of the situations, and is not a fixed mode.

[0048] In the utility model, in order to more vividly simulate the direct sunlight, the straight plane disc 4 is circumferentially provided with a plurality of laser emitters 8 emitting to the globe 1. The number of the laser emitters 8 is four, and the laser emitters 8 are correspondingly arranged with the first indication mark 41, the second indication mark 42, the third indication mark 43 and the fourth indication mark 44.

[0049] In the utility model, the globe 1 further includes a fixing frame 14, the bottom end of the fixing frame 14 is connected with the base 13; the two ends of the earth axis 12 are fixedly connected with the fixing frame 14 and are arranged to be inclined by 66°34'.

[0050] In the utility model, reference is made to the accompanying drawings Figures 1-2As shown, the earth axis pointing unchanged around the sun orbiting instrument 100 further comprises a ground 6; the bottom of the central shaft body 3 and the upper surface of the ground 6 are fixedly connected; the ecliptic turntable 2 is located above the ground 6, and the ecliptic turntable 2 and the ground 6 are rotatably connected through a rotating mechanism. Through the design of the ground 6, the earth around the sun orbiting instrument can be moved flexibly; the upper layer rotation design of the ecliptic turntable 2 and the ground 6 and the cooperation of the lower layer fixed base can improve the stability of the whole device while ensuring the flexibility of the whole operation.

[0051] As a specific rotating embodiment, the rotating mechanism comprises an annular slide rail formed on the bottom surface of the ecliptic turntable 2 and an annular slide groove formed on the upper surface of the ground 6. The annular slide rail and the slide groove are matched, which is suitable for frequent start-stop operation in teaching demonstration.

[0052] As another specific rotating embodiment, the rotating mechanism can also be a bearing turntable (not shown), and the bearing turntable scheme reduces the friction loss of the ecliptic turntable 2 and the ground 6 through a precision bearing, so that manual driving is more labor-saving and smooth, and the built-in damping mechanism can arbitrarily hover the globe 1 position, which is convenient for step-by-step explanation of astronomical phenomena. The structure of the bearing turntable can refer to the rotating principle of the tabletop of the dining table. The dining table top usually adopts a universal bearing turntable, which is prior art, and will not be described here.

[0053] The above embodiments and drawings are not limited to the product form and style of the utility model, and any ordinary skilled person in the art can make appropriate changes or modifications, which should be considered as not departing from the scope of the utility model.

Claims

1. A heliocentric planetarium with a fixed prime vertical, characterized in that: The application relates to a planetarium, which comprises a planet model, an earth axis, a base, a zodiac rotating disc, a central shaft body and a direct-impact flat disc. The planet model, the earth axis and the base are connected with the zodiac rotating disc through a bearing, and the base is connected with the central shaft body through a transmission belt; the planet model and the zodiac rotating disc can revolve around the central shaft body under the drive of external force; the direct-impact flat disc is arranged on the top of the central shaft body and is used for simulating the direct-impact point of the sun on the planet model; the earth axis is always pointed to a fixed direction when the planet model revolves; and the direct-impact point can move back and forth between the north and south return lines of the planet model. The bearing comprises a bearing inner ring and a bearing outer ring; the bearing inner ring is fixedly connected with the zodiac rotating disc; the bearing outer ring is rotatably connected with the bearing inner ring; the base comprises an upper clamping seat and a lower fixed ring; the lower fixed ring is fixedly connected with the bearing outer ring; and the upper clamping seat and the lower fixed ring are clamped.

2. The geo-axis fixed terrestrial orbiter of claim 1, wherein: The transmission belt is arranged around the outer wall of the central shaft body and the lower fixed ring; and the central shaft body and the lower fixed ring have the same diameter.

3. The geo-axis fixed terrestrial orbiter of claim 2, wherein: The outer wall of the central shaft body is formed with a first groove; the outer wall of the lower fixed ring is formed with a second groove; and the first groove and the second groove are connected through the transmission belt.

4. The geo-axis fixed terrestrial orbiter of claim 3, wherein: The first groove and the second groove are at the same horizontal level and have the same diameter.

5. The geo-axis fixed terrestrial orbiter of claim 4, wherein: The direct-impact point of the direct-impact flat disc and the center of the planet model are always at the same horizontal level.

6. The geo-axis fixed terrestrial orbiter of claim 5, wherein: The direct-impact flat disc is sequentially provided with a first indication mark, a second indication mark, a third indication mark and a fourth indication mark; and the first indication mark, the second indication mark, the third indication mark and the fourth indication mark are distributed in a circumferential array around the center of the direct-impact flat disc.

7. The geocentric heliocentric orbiting planetarium of claims 1-6, wherein: The direct-impact flat disc is circumferentially provided with a plurality of laser emitters which emit laser beams towards the planet model.

8. The geo-axis fixed terrestrial orbiter of claim 7, wherein: The number of the laser emitters is four; and the laser emitters are one-to-one corresponding to the first indication mark, the second indication mark, the third indication mark and the fourth indication mark.

9. The geocentric heliocentric orbiting planetarium of claim 8, wherein: The application further relates to a ground platform; the bottom of the central shaft body is fixedly connected with the upper surface of the ground platform; the zodiac rotating disc is arranged above the ground platform and is rotatably connected with the ground platform through a rotating mechanism.

10. The geocentric heliocentric orbiting planetarium of claim 7, wherein: ​

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