Demonstration board for linear three-sided projection with space model corner split line linkage

Abstract

A linear three-sided projection demonstration board with space model angle-division line linkage, comprising a projection board, a space linear model mechanism, a projection connection mechanism, a linear projection mechanism and a linkage mechanism. The present invention adds a space model on the basis of the original flexible traction angular line linkage three-sided projection demonstration board and adopts a structure in which the linear space model and the linear projection are linked, especially the linkage of the angle line slideway and the angle line slider. The mechanism ensures that the distance from the horizontal projection of the moving point to the X-axis is equal to the distance from the side projection to the Z-axis. It is more intuitive to show the relationship between the position change of the space straight line and the change of its projection. Easy to operate, as long as you control the front projection of the moving point, it can automatically affect the horizontal projection and side projection of the moving point, and can set out the vertical line, horizontal line, lateral horizontal line, vertical line, plumb line, and side sag of the straight line in space. 7 positions of line and slant line. Presentations are significantly improved. Make the linear three-sided projection demonstration board more perfect.

Description

technical field [0001] The invention relates to teaching and demonstration teaching aids, in particular to a linear three-sided projection demonstration board with space model angle-division line linkage used in engineering drawing courses. Background technique [0002] In the engineering drawing course, the spatial position of the straight line is determined by the projection on the three projection planes, that is, the front projection, horizontal projection and side projection of the straight line. The straight line is represented by a straight line segment containing two endpoints, and the same The connection line between the front projection and the horizontal projection of the endpoint is vertical to the X axis, and the connection line between the front projection and the side projection is vertical to the Z axis. The distance from the horizontal projection to the X axis is equal to the distance from the side projection to the Z axis. There are seven situations for the...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the number of models is large, the volume is large, and it is inconvenient to carry, move and hang

The author previously invented a linear three-sided projection demonstration board (2016103993104) with flexible traction angle and split line linkage. Although the above problems have been solved, there is no linear space model, and it is impossible to vividly and directly demonstrate the linear changes in space and the corresponding projection changes.

Images