Combined plotting instrument for involute and ellipse

Abstract

The invention provides a combined plotting instrument for involute and an ellipse. The combined plotting instrument comprises a gear case and a vertical supporting part; two gears are arranged in the gear case, the gear case and the two gears are coaxially installed, an involute plotting device is arranged on one side of the gear case, and an ellipse plotting device is arranged on the other side of the gear case; the involute plotting device comprises a rotating rod, a guide rail rod, synchronous pulleys, a sliding block, a plotting pen, a connecting rod, a moving block, a tensioning device and a driving synchronous pulley; the ellipse plotting device comprises a suspension arm, a fixing shaft, transverse moving blocks, a fixing rod, a supporting frame, synchronous pulleys, a large gear, a small gear, a plotting pen vertical rod, a plotting pen rotating rod and an ellipse plotting pen. According to the curve plotting instrument, the involute plotting device and the ellipse plotting device are arranged, therefore, both an involute curve and an ellipse curve can be plotted, the defects that in the prior art, plotting is difficult and complex are changed, the plotting steps are simple, the track is precise, and the plotting instrument is easy to manufacture and achieve and is an ideal plotting tool for teaching and learning.

Description

technical field [0001] The invention relates to a curve drawing tool, in particular to a combined involute and ellipse plotter. Background technique [0002] At present, there are no teaching aids on the market for precisely drawing curves such as involutes and ellipses. When teachers describe the relevant knowledge of involutes, they generally fix a circular axis on a plane, wind the thread around the axis, and pull a thread end so that the thread moves around the circular axis and is always tangent to the circular axis. A fixed point on the line The locus on this plane is the involute, which is difficult and imprecise to draw. And existing ellipse plotter also generally exists the difficulty of drawing operation, the drawing work of instrument is too loaded down with trivial details, manufacture difficulty and other defects. Also there is no combined plotter for involutes and ellipses today. Contents of the invention [0003] Aiming at the deficiencies in the prior ar...

AI Technical Summary

Problems solved by technology

When teachers describe the relevant knowledge of involutes, they generally fix a circular axis on a plane, wind the thread around the axis, and pull a thread end so that the thread moves around the circular axis and is always tangent to the circular axis. A fixed point on the line The trajectory on this plane is the involute, so drawing the involute is difficult and imprecise

However, existing elliptical plotters also generally have defects such as difficulties in drawing operations, too cumbersome instrument drawing work, and manufacturing difficulties.

There is no combined plotter for involutes and ellipses

Images