SU815146A1 - Working member of earth-digging machine - Google Patents

Description

one

The invention relates to mechanical engineering and can be used, for example, in earth moving machines.

The working body of the earth-moving machine is known, including an auger, cutting elements, auger covers and a drive 1.

The disadvantage of this working body is sticking of the internal cavities of the screw and reducing the efficiency of its unloading during the development of sticky soils.

Also known is the working body of the earthmoving machine, which includes two augers parallel to the overlapping of turns, cutting elements, screw housings and a drive ensuring rotation of the screws in one direction, with the turns of one auger being discontinuous in length in the form of separate sections composed of interchangeable cutters 2

In this working body, sticking of the internal cavities of the screw is prevented by destroying the soil mass with sections of the intermittent screw, but a significant drawback is its increased energy intensity due to the intensive mixing of the soil caused by the screw sections, and

turns of augers and the direction of their mutual rotation does not allow overlapping of turns of augers to the full depth, i.e. it does not prevent sticking of the screw over its entire depth.

The purpose of the invention is to reduce the energy intensity of the workflow.

The goal is achieved by the fact that the augers are arranged sequentially in the direction of motion, with the subsequent auger made in diameter less than the previous

o and in the upper part has blades mounted inclined to the opposite direction of the auger rotation.

FIG. depicts a working body, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

five

The working body contains the main screw 1 with the cutting elements 2, the auxiliary screw 3, the front casing 4, the rear casing 5, the drive of the main screw 6, the gear wheels 7 and 8 of the auxiliary screw drive, planted on the shafts 9 and 10 respectively of the main and auxiliary screws, blades 11 mounted on the shaft of the auxiliary screw in the zone of unloading soil from the working body. The working tool is associated with a soil thrower 12, which is hung per tonne gauge 13.

The auxiliary screw 3 is mounted adjacent to the main screw 1 from the side opposite to the cutting zone 14 of the soil, with the overlapping of the turns of both screws (size). The ends of the shafts of both screws are mounted on bearings 15 and 16 in the casing 5.

Auxiliary screw 3 is made with the direction of the turns opposite to the direction of the turns of the main screw, with a step of turns equal to the turn of the turns of the main screw. The number of teeth of the wheels 7 and 8 is made equal to each other, which ensures that the screws are turned in opposite directions with equal angular velocity modulo the module.

The screws are made with the following, their ratio of sizes Ri, rj, g «R2 + ri-R ,;

where RI and Ra are the radii of the main and auxiliary screws, respectively;

L-distance between axles of screws;

g / and gd. - the radii of the shafts, respectively, of the main and auxiliary screws.

The blades 11 are fixed on the shaft 10 in such a way that their surfaces are inclined to the plane of the cross-section of the screw 3 in the direction opposite to the direction of the screwing of the screw (angle ot).

The main screw 1, receiving from t gacha 13 feed into the ground in the direction of travel, gacha and damage from drive 6, with the aid of cutting elements 2 cuts off the ground and transports it up the coils, where through the window in the front casing 4 the ground gets into the thrower 12, and from there to the dump.

The rear casing 5 with its pointed edges reads the walls of the trench.

The auxiliary screw 3 cuts the soil along the entire transportation route with its main screw 1 at the base of the windings of the latter, thereby preventing the screw from clogging with sticky soils and increasing the efficiency of its transportation.

Performing the turns of both augers in solid forms ensures cutting the soil without mixing it, and also reduces the energy intensity of the work process. The pitch of the turns of both screws is the same, the directions of the turns are mutually opposite and the drive is ensured that the screws are turned in opposite directions with the same angular velocity in module, ensures the mutual introduction of both screws with the overlapping of turns and saves them with mutual vrash.

So, as the auxiliary screw 3 is made smaller in diameter than the main screw 1, a back angle is created in the casing 5, which prevents the external surface of the casing from rubbing in the area of the auxiliary shkan on the trench walls.

Making the augers according to the above dimensions ratios ensures that the auxiliary screw cuts the transported soil to the full depth of the main auger - from the outer edge of the coil to the auger shaft.

The blades 11 destroy the stuck soil in the zone of unloading from the working body and facilitate its loading into the thrower 12. The slope of the blade surfaces described above contributes to the portioning of the ground from the slip of the monolith.

Thus, the described working vehicle provides efficient development and transportation from soft-stick soils with reduced energy consumption.

Claims (2)

1. Author's certificate of the USSR 5 No. 376328, cl. E 02 F 3/06, 1971. 2. USSR author's certificate No. 238410, cl. E 02 F 5/04, 1967 (prototype). /% 5% $$ 7i J% $: S $:% §S turned 2 View b will turn that eleven Fig.Z W Jf 3