SU1377338A1 - Scraper bucket - Google Patents

Abstract

The invention relates to earthmoving machinery, namely, scrapers. The purpose of the invention is to reduce metal consumption. The bucket includes the side and rear walls, the bottom G i HFTTT / 2, pivotally connected to the knife 3, and the hydraulic cylinder (HZ) 4 rotations of the knife. 3. The stock cavity of the HZ 4 communicates with the working cavity of the pressure sensor 10, and the piston cavity with the hydroaccumulator 5, Sensor 10 operates as an elastic container attached to the rear wall of the bucket and located vertically along its inner side with the working fluid. At the initial moment of the collection of soil, the entire cavity of the container of the sensor 10 is filled with a working fluid. As the bucket is filled with soil, the capacity of the sensor 10 is reduced by the pressure of the soil. The working fluid is expelled into the rod cavity of HZ 4. Knife 3 is rotated, increasing the cutting angle. 1 il. cl with | oo from 00

Description

The invention relates to earthmoving machinery, namely scrapers.

The purpose of the invention is to reduce metal content.

The drawing shows a scraper bucket.

The scraper bucket includes side walls 1, the bottom 2, to which the cutting knife 3 is fixed but hinged. The hydraulic cylinder 4 of the knife rotation is connected by a hinge stem to the cutting knife 3, and the body - from the bottom: 2, Piston half of the hydraulic cylinder 4 is connected to the hydroaccumulator 5, which communicates through the valve 6 with the hydraulic tank and through the check valve 7 and the hydraulic valve 8 with the pressure hydroline, the rod cavity of the hydraulic cylinder 4 is connected with the high pressure transducer of the hydraulic converter 9 which is connected to the low pressure cavity sensor ohm 10 pressure The latter is made in the form of an elastic tank, filled with the working fluid and attached to the back wall of the bucket vertically along its inner side.

Scraper bucket works as follows

way

one

At the initial moment of soil collection into the bucket, the entire cavity of the elastic capacity of the sensor 10 is filled with working fluid. The movable elements of the pressure transducer 9 are in the extreme left position, as well as the piston of the hydraulic cylinder 4 which is pushed to the left by the pressure of the working fluid from the hydraulic accumulator 5, the Cutting knife 3 at this time takes the position corresponding to the minimum cut angle , and guides the shear cut of soil along the bottom towards the rear; bucket wall.

As the bucket is filled with soil, the volume of the cavity of the sensor 10 is reduced by the pressure of the soil on the back wall. When the volume of the cavity of the sensor 10 decreases, the working fluid is displaced into the low pressure cavity of the pressure transducer 9, and its moving elements are moved to the right.

with

0 5 0

0

5 0 З

0

five

The working fluid from the cavity of the high pressure of the pressure transducer 9 is displaced into the rod stock of the hydrodilator 4 of the cutting knife connected with it, as a result of which the latter turns, increasing

 Increasing the cutting angle changes the trajectory of the cutting of the soil chips in the direction corresponding to the minimum resistance experienced by the chips when overcoming the thickness of the soil filling the scrapper bucket. This resistance decreases as the steepness of the chip path increases.

The change of the cutting angle occurs automatically during the whole bucket filling period depending on the current value of the soil volume in the scraper bucket. The ratio of the cutting angle and the volume of the soil in the ladle can be changed in accordance with the operating and soil conditions by adjusting the initial pressure of the working fluid in the accumulator 5 by appropriate tightening of the hydraulic valve spring 8,

Claims (1)

After unloading the scraper bucket, all elements of the device return to their original position under the action of the pressure of the working fluid coming from the hydraulic accumulator 5. I Invention Formula A scraper bucket containing side and rear walls, a bottom, a knife pivotally connected to it, a hydraulic cylinder for rotating the knife, a hydraulic accumulator and a pressure sensor connected to the working cavity with the rod of the hydraulic cylinder for rotating the knife, the piston cavity of which is connected to the hydraulic accumulator, characterized by In order to reduce metal consumption, the pressure sensor is made in the form of an elastic container with a working fluid attached to the back wall and vertically along its inner side. core rotating knife connected to the top of the flexible container. VNIIPI Order 820/20 Circulation 636 Production polygr, pr-tie, g, Uzhgorod, st. Project, 4 Subscription