Ellipsograph

Abstract

The invention discloses an ellipsograph. The ellipsograph comprises a sliding groove. A suction cup is arranged on the lower face of the sliding groove. A rotary knob is rotationally connected to the upper face of the sliding groove. A groove body of the sliding groove is in sliding connection with a slider. The end portion of the slider is connected with one end of a connecting rope, and the other end of the connecting rope is connected to the rotary knob in a winding manner. The slider is fixedly provided with an elastic ring. The upper portion of the periphery of the elastic ring is in sliding connection with a sliding block. A supporting rod is arranged at the end portion of the sliding block and is in sliding connection with a chalk slider in a penetrating and inserting manner. A chalk base is fixed to the lower face of the chalk slider. The end portion of chalk extends out of the chalk base, the ellipsograph can be adsorbed to a workpiece through the suction cup, and the ellipse shape needing to be drawn can be selected through extrusion on the elastic ring from the slider and observation on the elastic ring, and the size of a drawn ellipse can be selected through sliding of the supporting rod and the chalk slider.

Description

technical field [0001] The invention relates to the field of machinery, in particular to an ellipse gauge. Background technique [0002] Just like the tool for drawing a circle is called a compass, the tool for drawing an ellipse is called an ellipse gauge. At present, there are two main types of ellipse gauges on the market. The first is a new type of ellipse gauge, and the second is a traditional ellipse gauge. The first definition: the locus of a point whose sum of distances from two fixed points F1 and F2 in the plane is equal to a constant (greater than |F1F2|) is called an ellipse. The shape and size of are determined by the major semi-axis a, minor semi-axis b, and half focal length c. Among them, as long as you know any two parameters in a, b, and c, you can determine the shape and size of the ellipse. The following is to use the semi-major axis a and the semi-focus c to determine the shape and size of the ellipse. The two ellipse gauges have their own Advantages, ...

AI Technical Summary

Problems solved by technology

Among them, as long as you know any two parameters in a, b, and c, you can determine the shape and size of the ellipse. The following is to use the semi-major axis a and the semi-focus c to determine the shape and size of the ellipse. The two ellipse gauges have their own Advantages, but the traditional ellipse gauge cannot draw ellipses with different sizes and fullness according to the situation, and the new ellipse gauge cannot draw ellipses on the basis of smooth surface and no damage to the workpiece

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