SU988590A1 - Device for reproducing curves in polar coordinate system - Google Patents

Description

The invention relates to devices for the reproduction of curves and can be used in drawing technique, in mechanisms for obtaining guide lines, with mechanized drawing of ornaments.

A device for drawing cycloidal curves is known, comprising a motor, a gearbox, a crown wheel, a satellite, a satellite sprocket, a carrier, a chain drive, an asterisk, a barbell and a writing element t.

However, the known device does not allow building sinusoids, except, moreover, it is inconvenient in operation and structurally cumbersome.

A device for reproducing curves in a polar coordinate system is known, comprising a motor, a planetary mechanism, a working body mounted on a slider with a tangential slot fixed on a carrier, and a crank with a finger located in a slot of a slide mounted on a carrier and connected to satellite C 2.

However, in this device, the presence of the body does not allow obtaining large-sized curves, and also makes it difficult to change the wheel and the satellite when tuning to a different gear ratio.

since. access to them is possible only from the bottom of the case.

The aim of the invention is to expand the range of reproducible curves, increase their size and increase usability.

This goal is achieved by the fact that in the device for reproducing curves in the polar coordinate system,

10 containing an engine, a planetary mechanism, a working body mounted on a slider with a tangential groove mounted on the carrier, and a crank with a finger, located in a par15 of the memory of the slider mounted on the carrier. and connected to the satellite, there are gearboxes, one of which is connected to the central wheel and the other to the carrier, while the crank is connected to the satellite through a chain transmission.

The drawing shows devices for reproducing curves in a polar system, a general view.

25

The device has a drive 1 with an engine and a gearbox, the output of the first gearbox is the shaft 2, the carrier carrier 3, on the top beam of which the sleeve 4 is installed,

Claims (2)

30 satellite 5 and associated daughter b, connected through a chain transmission 7 with an asterisk 8 mounted on sleeve 9 with a crank 10, the finger 11 of which fits into the tangential groove 12 of the slider 13 of the working member 14 mounted on the lower beam of the carrier 3 and the output of the second gearbox is the central wheel 15. The finger 11 can move, along the crank 10. The device operates as follows. The shaft 2 rotates the carrier 3 and the working body 14 around its axis, at the same time the rotation of the central wheel 15 through the satellite 5, sprocket 6, chain drive 7, sprocket 8, screw 9 and crank 10 is converted into reciprocating motion of the slide 13 and the working body 14 At the same time, a sinusoidal curve is reproduced, having an average circumference of a radius equal to the distance between the axles of the sleeve 4 and the shaft 2, and the amplitude of the creep oscillations equal to the distance between the axes of the sleeve 9 and the finger 11 of the crank 10. Selecting different rotation speeds of the shaft 2 , wheels 15, both in one and in the opposite direction about the x, n distance between the axes of the sleeve 9 and the finger 11 can reproduce a plurality of cyclic krivyh.s rotational symmetry and reflection. The absence of an outer casing, an extended carrier and a crank allow you to expand the set and size of the reproducible curves. The possibility of switching the speeds of rotation of the carrier and the central wheel increases the ease of use of the proposed device. The invention of the device for playback. curves in the polar coordinate system containing an engine, a planetary mechanism, a working body mounted on a slider with a tangential groove mounted on the carrier and a crank with a finger located in the groove of the slide mounted on the carrier and connected to a satellite, characterized in that in order to expand the range of reproducible curves, it has gears, one of which is connected to the central wheel and the other to the planet carrier, while the crank is connected to the satellite via a chain transmission means. Sources of information taken into account during the examination 1. USSR author's certificate No. 629087, cl. In 43 L 11/00, 1978. 2. Author's certificate of the USSR 612834, cl. In 43 L 11/00, 1978 (prototype).