SU874899A2 - Earth-moving machine working member - Google Patents

Description

(54) WORK BODY OF THE DIGGER MACHINE

 I. .

The invention relates to earthmoving machinery, namely to the working bodies of earth-moving dumping machines.

According to the new auth. St. No. 759664 is known working body of the earthmoving machine, containing a blade, on the frontal surface of which there is an elastic tape with a protective sheet. In the elastic band is made, the cavity for the pulsating working medium 1,

However, the resistance to cutting soil when working with such a blade remains significant, which reduces the performance of the earthmoving machine.

The purpose of the invention is to increase productivity by reducing cutting resistance and moving the soil over the blade.

. This goal is achieved by the fact that the protective sheet is connected to the upper part of the body of the blade pivotally, and to the lower part by means of an elastic connection.

In addition, the elastic bond fulfills

from rigidly secured on the back of the cTOpQnO protective sheet and missed through

body of guide pins t

with caps on the free ends and out

gih elements installed between the lugs and the body of the blade. In this case, the elastic elements can be made either from springs or from elastic washers with internal cavities, which are connected with the cavities of the elastic ribbon of the heap with the possibility of alternately entering into them a pulsating working medium.

FIG. 1 shows the working body, the cross section (elastic elements in the form of springs); in fig. 2 - the same (elastic

10 elements in the form of elastic washers with internal cavities); in fig. 3 - hydraulic system; in fig. 4 - hydropulsator, cross section.

The working body of the earthmoving machine contains a blade 1, on which is installed

5 elastic tape 2, covered with a protective sheet 3 made of wear-resistant material, for example steel, in the lower part of which cutting knife 4 is fixed. In elastic tape 2 parallel to the cutting edge of knife 4 cavities 5 are made for pulsating working medium, in particular for liquid.

The protective sheet 3 is attached to the blade 1 in the upper part by means of hinges 6.

At the bottom of the blade I and the elastic band 2 there are holes for the guide pins 7 attached to the protective sheet 3. To attach the protective sheet 3 to the blade 1 on the guide pins 7 with the stops 8, springs are installed in one of the options (Fig. 1) 9, and in the other (Fig. 2) elastic cleats 10 with cavities 11.

The cavities 5 communicate with the reservoir 12 for liquid through the pump 13, the pipeline 14, the hydropulsator 15 and the pipeline 16. Through the pipeline 17, the hydropulsator 15 communicates with the drain. The hydropulsator 15 has a rotating core 18 connected to the engine through a shaft 19. On both sides of the core 18 there are cavities 20 and 21, which are connected to each other by channels 22.

In the middle part of the core 18 there is a radial channel 23 connected to the axial channel 24 communicating with the pipeline 17. A reducing valve 25 is installed between the hydropulsator 15 and the reservoir 12.

For the version with elastic washers 10 (Fig. 2), cavities 11 ps1 are connected to the hydropulsing system in antiphase with respect to cavities 5 of the elastic tape 2. cavities 11 with a pipe 28. The axial channel 29 with pipe 30 is connected to a drain.

For the version with the springs 9, the adjusting nuts 31 are mounted on the guide pins 7.

To carry out the work, the blade I goes down to the ground and moves it, the knife 4 is inserted into the ground, the soil chips are separated and move along the frontal surface of the blade 1. At the same time (with the springs) the elastic band 2 is compressed between the adjusting nuts 31 and blade 1 there are gaps. At the same time, the working fluid from reservoir 12 is supplied by pump 13 through hydropulsator 15 in cavity 5 of elastic tape 2, pressure rises sharply, and in cavity cavities 5 deformation of elastic tape 2 occurs. Clearances disappear and springs 9 contract. When the supply of working fluid in the cavity 5 is stopped, the pressure drops, and the deformation of the elastic tape 2 disappears. Then the duty cycle is repeated.

When elastic elements are made in the form of elastic washers 10 with cavities 11, the hydro-pulsating system is connected to

parallel and in antiphase to the working hydropulsator 15 hydropulsator 26. At the same time, from the pump 13 through the pipeline 28, liquid is supplied to the cavities 11 of elastic washers, as a result of which pressure is created

and the shields 10 are deformed. And since there is no pressure in the elastic band 2, the band 2 is compressed. When the pulsator 26 connects the cavities 11 to the discharge pipe 30, the pressure in the cavity x 11 drops.

With periodic repetition of working cycles, the protective sheet 3 with the cutting knife 4 oscillates, which contributes to the effective separation of the soil and a decrease in cutting resistance. As a result, the productivity of the machine increases.

The nominal mode of vibration is provided by varying the frequency of rotation of the core 18. In this case, the frequency also changes.

vibrations of elastic tape.

Claims (4)

1. The working body of the digging machine according to ed. St. No. 759664, characterized in that that, in order to increase productivity by reducing the resistance to cutting and moving the soil over the blade, the protective sheet is connected to the upper part of the dump body hingedly, and to the lower part - by means of elastic connection. 2. Working body according to claim 1, characterized in that the elastic connection is made of a protective sheet rigidly mounted on the back side and passed through the body of the blade guide fingers with stops at the free ends and of elastic elements mounted between the stops and the body of the blade. 3. The working body according to claim 2, characterized in that the elastic elements are made of springs. 4. A working organ according to claim 2, characterized in that the elastic elements are made of elastic washers with internal cavities that are associated with the cavities of the elastic ribbon of the blade, with the possibility of alternately entering into them a pulsating working medium. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 759664, cl. E 02 F 3/76, 1978. W / FIG. 2 fl / J (Pi / r.