Sun earth moon motion instrument

Abstract

The invention discloses a sun earth moon motion instrument, which comprises a central fixing shaft. The top end of the central fixing shaft is fixed with a central main gear; a sun model is arranged on the central main gear; a rotation arm is arranged, in a rotating mode, on the central fixing shaft and located below the central main gear; the center of the rotation arm is overlapped with the center of the central fixing shaft; the rotation arm is provided with a main motor; the output shaft of the main motor is provided with a driving motor gear; the driving motor gear and the central main gear are engaged; one end of the rotation arm is provided with an earth-moon system sliding assembly, and the other end of the rotation arm is provided with a balance weight; the earth-moon system sliding assembly comprises a sliding fixing plate and an earth autorotation mechanism and a moon revolution mechanisms arranged on the sliding fixing plate; and an elliptical orbit control mechanism and a belt wheel tensioning mechanism are arranged between the earth-moon system sliding assembly and the central main gear. The sun earth moon motion instrument provided by the invention can accurately demonstrate sun earth moon motion rules.

Description

technical field [0001] The invention relates to the technical field of teaching instruments, in particular to a sun-earth-moon movement instrument. Background technique [0002] The sun-earth-moon movement instrument (three-sphere instrument) is indispensable as a routine experimental instrument for geography teaching in primary and secondary schools. Most of the existing products on the market have a perfectly circular orbit of the earth (the actual orbit is an ellipse), which brings about the practical problem that the instrument does not match the design phenomenon, and the teacher needs to explain to the students in class, etc. Inconvenient question. As we all know, the earth revolves around the sun. Since the earth orbits the sun in a perfect circle, there is no way to realize the phenomenon of far and near when the earth revolves around the sun. Some important geographical phenomena such as aphelion and perihelion cannot be demonstrated by instruments. out, teachers ...

AI Technical Summary

Problems solved by technology

Most of the existing products on the market have a perfectly circular orbit of the earth (the actual orbit is an ellipse), which brings about the practical problem that the instrument does not match the design phenomenon, and the teacher needs to explain to the students in class, etc. Inconvenient question

As we all know, the earth revolves around the sun. Since the earth orbits the sun in a perfect circle, there is no way to realize the phenomenon of far and near when the earth revolves around the sun. Some important geographical phenomena such as aphelion and perihelion cannot be demonstrated by instruments. out, teachers will have no way to explain these astronomical phenomena and the reasons for seasonal changes through equipment

Images