Curve block and cam contour curve drawing instrument

Abstract

The invention discloses a curve block, and belongs to the field of drawing instruments. The curve block comprises a bottom plate, two side plates, a first baffle, a second baffle and a plurality of adjusting pieces, wherein the two side plates are perpendicular to the bottom plate and are opposite and parallel; the first baffle and the second baffle are perpendicular to the bottom plate and the two side plates and are oppositely arranged; the plurality of adjusting pieces are sequentially attached together and placed in a groove defined by the two side plates, the first baffle and the second baffle; the curve block further comprises a press plate, a straight rod, a first fastening piece and a second fastening piece, the press plate is arranged between the first baffle and the second baffle, a first through hole and a second through hole are formed in the same horizontal heights of the first baffle and the press plate respectively, waist-shaped holes are formed in the middles of the plurality of adjusting pieces respectively, the straight rod penetrates through the first through hole, the waist-shaped holes and the second through hole, and the first fastening piece and the second fastening piece are fastened at two ends of the straight rod respectively; and under the condition that the placing heights of the upper ends of the adjusting pieces are different, a displacement curve of different driven members can be simulated, and material waste is avoided.

Description

technical field [0001] The invention relates to the field of drawing instruments, in particular to a curve block and cam profile curve plotter. Background technique [0002] The cam is a kind of mechanical rotary or sliding part, and the high-level mechanism composed of the three components of the cam, the follower and the frame is called a cam mechanism. The main function of the cam mechanism is to make the follower complete various complex motions according to the work requirements, including linear motion, swing, constant speed motion and non-uniform motion. In order to study and study the cam mechanism, it is usually necessary to draw the profile curve of the cam. [0003] At present, the method of drawing the cam profile curve mostly adopts the "inversion method". The specific steps are: divide the base circle into equal parts, and mark special angles according to the displacement curve of the follower, such as the lift angle, the near repose angle, Return angle, far ...

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