RU1793135C - Link-and-lever trisection mechanism - Google Patents

Description

0-t #

The invention relates to bench-marking tools and will find application in various machine-building enterprises when performing marking operations to divide the angle into three equal parts .; ./- :.

A device for dividing angles into equal parts should be taken as an analogue of the present invention. The indicated analogue, like the proposed mechanism, contains four guides with sliders mounted on them. A big disadvantage of the analogue is the presence of curved springs in it, the use of which as full links is illogical and unacceptable, because their behavior with a different solution of the legs (guides) of the device will be far from identical, i.e. there will be a very large difference in the values of the opening of adjacent springs and correspondingly adjacent legs, as a result of which the accuracy of the tool will be unacceptably low, obviously unacceptable in practice,

The prototype of the proposed mechanism should adopt the rocker mechanism of the trisector (Nfc 1240). Said prototype comprises four legs, two middle of them are guides, four connecting rods articulated with legs. The mechanism performs a trisection of the angle.

The disadvantage of the prototype is its unsuitability for trisection of the angle in the case of an inaccessible vertex of the original (given) angle, subject to TRICKSII,.: ..; ......;. - - -. ;. :. - .. ..-

The purpose of the invention is the expansion of the operational capabilities of the tool, .o,;:.:. -v /-;..-. . ;;. :: -.

The essence of the invention is that the rocker-lever mechanism of the trisector, containing two rails whose axes are crossed, two sliders mounted on the respective rails, and four rods. It is equipped with two additional rails mounted on the respective additional rails of two sliders with clamps designed to fix trisector elements and two connecting rods, while all the connecting rods are paired together by hinges dividing their lengths in a ratio of 1: 2, smaller shoulders

the connecting rods are pivotally connected to the respective guides, and the other arms of the connecting rods are pivotally connected to the respective sliders.

The drawing shows a kinematic

scheme of the proposed rocker-link mechanism of the trisector,

The rocker-lever mechanism of the trisector contains guides 1-4, the axes of which intersect at the point O, which is

the apex of the angle to be trisected, the connecting rods 5-10, the sliders 11-14, sliding along the guides 1-4, and the latches 15 and 16, while the connecting rods are connected in pairs by hinges, the connecting rods 5-10 with their internal

(facing point O) the ends are pivotally connected to the corresponding, the same inner ends of the rails 1-4, the outer ends of the connecting rods are pivotally coupled to the corresponding

sliders sliding along guides 1-4 and divide the length of the connecting rods in a ratio of 1: 2. ; ..

The work of the linkage mechanism.

When the latches 15 and 16 are depressed, the axes of the extreme guides 1 and 4 are carefully aligned with the sides of the angle to be trisected, for which purpose compression is performed or vice versa

of said outer rails, as a result of which the two middle rails 2 and 3 automatically perform trisection. If necessary, the mechanism is locked by means of latches 15 and 16.

Claims (1)

SUMMARY OF THE INVENTION A rocker-lever trisector mechanism comprising two rails whose axes are intersected, two sliders mounted on respective rails, and four rods, both of which are separate; that, in order to expand the operational capabilities, the mechanism is equipped with two additional rails mounted on the respective additional rails, two crawlers, with clamps designed to fix trisector elements, and two rods, all rods are connected in pairs by means of hinges, dividing their lengths in the ratio 1: 2, wherein m 51793135 6 the lower arms of the connecting rods are pivotally connected; the shoulders are pivotally connected to the corresponding guides, other sliders.