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Rotating Surface Demonstration Aids

A technology of rotating surfaces and teaching aids, applied in the field of analytic geometry teaching aids, can solve problems such as teaching difficulties

Inactive Publication Date: 2019-03-12
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the existing rotating surface teaching aids, there is no teaching aid that can clearly show the difference between the warp and the busbar, which brings difficulties to teaching

Method used

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  • Rotating Surface Demonstration Aids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Embodiment: A demonstration teaching tool for a rotating curved surface. The main structure includes a base, a twisting and rotating mechanism, a busbar mechanism, and a projection device.

[0041]Described torsional rotation mechanism comprises lower rotating shaft 1, lower connecting rod 2, upper rotating shaft 3, upper connecting rod 4 and control rod 5, described lower rotating shaft 1, lower connecting rod 2, upper rotating shaft 3, upper connecting rod 4 and control rod 5 are hollow tubular structures, the base is provided with an installation chamber 20, the bottom end of the lower shaft 1 penetrates the installation chamber 20 vertically, and a Thrust bearing, a rotating bearing is installed between the top wall of the installation chamber 20 and the lower shaft 1, the bottom of the lower shaft 1 is fixedly connected with a transmission gear 21, and a motor 6 and a power gear 22 are installed in the installation chamber 20 , the power gear 22 meshes with the tra...

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PUM

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Abstract

The invention discloses a surface of revolution demonstration teaching tool, and mainly relates to the analytic geometry teaching tool field. The teaching tool comprises a base, a torsional rotating mechanism, and a busbar mechanism. The torsional rotating mechanism comprises a lower rotating shaft, a lower connecting rod, an upper rotating shaft, an upper connecting rod, and a control rod. The lower rotating shaft is rotatably disposed on the base, and the lower rotating shaft is driven by a motor disposed in the base. The lower end of the control rod and the lower rotating shaft are fixedly limited by two positions in an axial direction, and an included angle between the two positions is in a range from 20degrees to 80degrees, and the control rod penetrates the upper rotating shaft, and is synchronized with the upper rotating shaft in the axial direction. The upper rotating shaft is vertically connected with the upper connecting rod, and the lower rotating shaft is vertically connected with the lower connecting rod, and in addition, the busbar mechanism is detachably and fixedly disposed between the upper connecting rod and the lower connecting rod. The surface of revolution demonstration teaching tool is advantageous in that students can observe the forming process of the surface of revolution, and the students can compare a meridian line with the busbar conveniently, clearly, and visually, and therefore the students can understand and master related knowledge points quickly.

Description

technical field [0001] The invention relates to the field of analytical geometry teaching aids, in particular to the demonstration teaching aids of rotating curved surfaces. Background technique [0002] Surface of revolution is an important part of analytic geometry. A surface of revolution is a surface produced by rotating a curve Γ around a fixed line l in space. Among them, the curve Γ is called the generatrix of the surface of revolution. The meridian refers to the intersection of the half-plane passing through the axis l and the surface of revolution. In the study of rotating surfaces, how to accurately understand the generatrix and meridian, and how to judge and distinguish the generatrix and meridian, is the basis for learning the rotating surface. It is also a prerequisite for correct understanding and use of a large number of subsequent formulas to solve problems. However, the busbar is not necessarily a meridian, especially when the busbar is tilted, it is dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/04
CPCG09B23/04
Inventor 黄玉娟
Owner SHANDONG JIAOTONG UNIV
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