Novel gear generating instrument

A novel gear generating instrument comprises a chassis, a lower slide carriage, an upper slide carriage, a drawing tray, a short needle, a resistance increasing block and a toothed plate. The short needle is used to position a drawing, and a paper compressing backing plate fixed by a stud and a nut is used to compress the drawing, thereby reducing an error. The drawing tray and a gear base disc are set into two independent parts, and the separation and combination of the drawing tray and the gear base disc is controlled by the position change of the resistance increasing block, so that the relative position of the drawing and the toothed plate can change at will, and the diversity of an experiment is increased. During a tooth profile line drawing process, and by correctly arranging and adjusting the positions of the drawing and the toothed plate, all tooth profile lines of a gear can be drawn, and the expression of the gear is more vivid and visual. 种新型齿轮范成仪，包括底盘、下溜板、上溜板、图纸托盘、短针、增阻块和齿板，用短针来定位图纸，用以螺柱及螺帽固定的压纸垫板