SU901068A1 - Curve converter joint-lever mechanism - Google Patents

Description

I

The invention relates to the mechanization of graphic works, in particular to mechanisms for the mechanical transformation of curved lines.

The articulated lever mechanism of a curve converter is known, which contains three articulated on the base wings, connected in pairs by dyads consisting of two articulated joint sliders.

The disadvantage of the known mechanism is the limited shape of the transformed curve, due to the presence in the mechanism of a constant linear guide.

The purpose of the invention is to expand the range of tasks.

/} the achievement of this goal is a hinged-lever mechanism for converting curves, containing three articulated on the base, backstage, connected in pairs by dyads consisting of two articulated sliders, has a crank mounted on the base, the free end of which is articulated one of the dyads.

FIG. Figure 1 shows the kinematic scheme of the proposed hinge converter; Figures 2-5 show kinematic schemes of mechanisms for the formation of various algebraic curves (the proposed mechanism of the converter is based on the construction of mechanisms).

On a fixed base 1, the wings 2 are articulated. Backstage

Claims (1)

IS 2 and 3 are movably connected by a dyad consisting of sliders 5 and 6. Dyad is hingedly connected to crank 7, hinged on base 1. Swings 3 and t, 2: and 4 are movably connected 20 by dyads of sliders 8 and 9, 10, and 11. This kinematic chain has two degrees of freedom. 39 The converter works as follows. If point A is driven along a certain d line (Fig, 1) defined by the equation G (xy) O, then scenes 2 - A will rotate respectively around the axes of the hinges 0, 0 and 02. At the same time, point A2 of the dyad from the sliders 5 and 6 connected with crank 7 is described by circle dn, and point A of the dyads from sliders 8 and 9 moves along curve C; defined by the equation () 0. Thus, this kinematic chain transforms the F (x fV) O curve into the F (2 h) 0 curve. The mechanism (FIG. 2) additionally contains a fixed direction 1Sh4y p (with a slider 12, which at point A enters the rotational pair with the dyad of the sliders 10 and 11. When moving the links of the mechanism, the recording pin inserted into A describes the fourth order curve Cf. If, on this fixed mechanism, the hinges 0, 0, O 2 and O-3 are located on the same straight line , then the curve q ,, reproducible by the mechanism, splits into a conic and double nunz straight. In the figure. 12-link in Fig. 5 ten decimal me. 4 anisms. In Fig. 5, the axle rotates of the curtain are arranged in such a way that the links 6 and 7 become redundant (in Fig. 5 they are bracketed). expands the range of tasks to be solved, and also allows you to build new mechanisms for reproducing complex trajectories The invention The articulated lever mechanism of a transducer of curves containing three articulated base-mounted scenes pairwise interconnected by dyads consisting of two articulated joints It is new, because of the fact that, in order to expand the range of tasks, it has a crank mounted on the base, the free end of which is pivotally connected to one of the dyads. Sources of information taken into account in the examination 1. Dobrovolsky B.V. Theory of mechanisms for the formation of plane curves. M., Ed. USSR Academy of Sciences 1953, p.2. (Reg. 3 Oz