A robotic arm type auxiliary drawing device

Abstract

The invention discloses a mechanical arm type auxiliary drawing device. The auxiliary drawing device comprises a drawing board, a coaxial input device, an inner telescopic arm, a ruler, LED lamp beads, an inner square shaft and an outer square shaft; the coaxial input device is arranged at the right lower corner of the drawing board; the inner square shaft and the inner telescopic arm form a revolute pair; the inner square shaft and the outer square shaft form a movable pair; a second small bevel gear is arranged at the front end of the inner square shaft; a graduated scale is arranged on theupper side of the inner telescopic arm; the inner telescopic arm and an outer telescopic arm form a movable pair; a ruler mounting base is arranged at the front end of the inner telescopic arm; the ruler and the ruler mounting base form a revolute pair; an observation hole channel is formed in the center of a ruler rotating disc; the tooth number ratio of a first small bevel gear to a first largebevel gear is equal to the tooth number ratio of the second small bevel gear to a second large bevel gear; the center of the lower end of the ruler rotating disc is of a cavity structure, and the three LED lamp beads are uniformly distributed on the side wall of a cavity of the ruler rotating disc; and a sight bead is arranged at the center position of the lower end of the observation hole channel, a ruler middle position scale line is arranged at one edge of a long straight hole, and a straight line where the edge is located passes through the center of the sight head.

Description

technical field [0001] The invention relates to a device for assisting drawing, in particular to a mechanical arm type assisting device for drawing. Background technique [0002] At present, with the increasing abundance of computer graphics software, a large number of two-dimensional and three-dimensional graphics software has been popularized. However, in engineering colleges or industrial enterprises, drawing boards are still an important tool for basic manual drawing. Commonly used manual drawing tools include rulers, set squares, T-squares, squares, protractors, compasses, and horizontal angle rulers. The structure is different, and its function is relatively single. When doing manual drawing, multiple drawing tools need to cooperate with each other to complete the drawing task. Especially when drawing complex graphics, each drawing tool needs to cooperate with each other and use them alternately. It also needs to do a lot of auxiliary steps, leaving a lot of drawing m...

AI Technical Summary

Problems solved by technology

When using the mechanical arm type straight line drawing device to draw two parallel lines, it is necessary to draw a straight line first, then turn its telescopic mechanical arm to a certain angle, and then turn its straight line drawing mechanism to a certain angle to draw the first line. Parallel lines to a straight line, the operation is more complicated

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