Linear three-plane projection demonstration plate with space model and three-projection linkage

Abstract

The invention discloses a linear three-plane projection demonstration plate with space model and three-projection linkage. The linear three-plane projection demonstration plate with the space model and three-projection linkage comprises a projection plate, a space linear model mechanism, a projection line connection mechanism, a linear projection mechanism and a linkage mechanism. A space model is added on the basis of an original linear three-plane projection demonstration plate with flexible traction, a structure of linkage of the linear space model and linear projection is adopted, and particularly a linkage structure that a moving point ball is connected with two steel wire rope to simultaneously drag a horizontal projection and a side projection of a moving point is adopted, so that a distance from the horizontal projection of the moving point to an X axis is equal to that from the side projection of the moving point to a Z axis; a relationship of position change of a space line and change of projection of the space line is more intuitively shown; the operation is convenient, when the linear three-plane projection demonstration plate with the space model and three-projection linkage is used, as long as a front projection of the moving point is controlled, the horizontal projection and the side projection of the moving point can be automatically dragged, and seven positions, including a frontal line, a horizontal line, a side horizontal line, an orthographic vertical line, a plumb line, a side vertical line and a slanting line, of the space line can be laid out; the demonstration effect is remarkably improved; and the linear three-plane projection demonstration plate is perfecter.

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 and three-projection 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 th...

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 invented the flexible traction linear three-sided projection demonstration board (2016103993212) before. Although the above problems are solved, there is no linear space model, and it is impossible to vividly and directly demonstrate the linear changes of the space and the corresponding projection changes.

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