SU1254124A1 - Apparatus for making pits in earth - Google Patents

Description

The invention relates to construction, in particular to technical means for excavation of pits for foundations at a construction site.

The aim of the invention is to expand the technological capabilities by forming trenches of various shapes in plan.

FIG. 1 shows the device, common. FIG. 2 is a sectional view of FIG. one; in fig. 3 is a view of B in FIG.

The device contains a working body 1. in the form of a 3 first bit, fixed on the drill rod with a screw. 2 winding, a casing with side windows 3 and a planetary mechanism.

The planetary mechanism consists of a central gear 4, drove 5 on a bearing b and a satellite 7, mounted on the output drive shaft 8 of the rotation, which rests: on bearings 9. On the shaft of the satellite 7 a screw rod 2 is fixed. Rotation on the carrier is transmitted from drive shaft 10,

The principle of operation of the device for the formation of pits in the ground is as follows.

When transmitting the rotation of the drill rod 2 from the shaft of the satellite 7 of the planetary mechanism, the 3-first bit 1, moving inside the casing 3 of square section, destroys the soil. Boren. Soil enters the screw auger 2 and under the influence of

five

ten

ts

20

25

thirty

35

The centrifugal force is removed from the casing 3 into the side windows. The turns of the auger coils are in the form of a triangle of constant width.

one

When the carrier rotates, the satellite performs a planetary motion, rotating around two parallel axes. The same movement is made coaxially with the satellite of the drill rod with the working body in the form of a 3-first bit, which penetrates into the contour of the triangle of constant width. When the ratio of the radii of the initial circles of the central gear and satellite, equal to 4/3, the top of each feather describes the same Linsho - hypocycloid, which has four congruent branches and the same number of vertices.

In general, depending on

values of paJiHyca, pac-; one hundred from the center of the 3-nest chisel to the tip of the feather the branches of the hypocycloid can be convex, concave or

pr molineyni-sh.

If the magnitude of the generating radius (radius of the central wheel) is 2.5 g, where r is the satellite radius, then the hypocycloid has a square. With values of radius t); the central wheel within 4/3 - 4/1, the section of the excavation makes the razoriglzguyu form in terms of, for example, elliptical, triangular, etc.

.4-4

FIG. 2

Editor K. Boloshuk

Compiled by Cherenkin L

Tehred I.Popoaichcorrector M.Pojo

Order 4695 / 35Tirachs 641Subscription

BITSHI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Rautaska nab., d.4 / 3

Arbitrary and printing company, Uzhgorod, Projecto st., 4

Claims (1)

DEVICE FOR EDUCATION OF PITCHES IN SOIL, including a working body fixed on a drill rod with screw-wound winding and a drive shaft, characterized in that, in order to expand technological capabilities by forming pits of various shapes in plan, the device is equipped with a planetary mechanism, while the carrier is mounted on the drive shaft, and the satellite on the drill rod, at <5 S9> f