WORKING EQUIPMENT OF SINGLE-BUCKET HYDRAULIC EXCAVATOR Russian patent published in 2025 - IPC E02F3/28 

FIELD: earth-moving machines.

SUBSTANCE: invention relates to earth-moving machines and can be used, in particular, for restoration of design depth of underground pipelines, during excavation of soil from under pipeline or during filling of soil under pipeline. Working equipment of single-bucket hydraulic excavator, which includes boom, handle 1 and bucket 5 with hydraulic cylinder 6 of its extension drive, is equipped with additional section 3 of handle 1 and rear retractable wall 10 of bucket 5 with hydraulic cylinder 6 of its drive. At that, additional section of handle 1 is made hollow with guide inner surface, in which with possibility of longitudinal movement there installed is first slider 4 rigidly connected with bucket 5 and hingedly with housing of hydraulic cylinder 6 of bucket 5 extension drive, which rod is equipped with replaceable stop tip 7 and limiter 8 attached to additional section of handle 1. Second slider is installed movably inside first slider 4 and is rigidly connected to the rear sliding wall of bucket 5, which is pivotally connected to the rod of hydraulic cylinder 6 of the drive of the rear wall of bucket 5, which is pivotally connected by the housing to first slider 4.

EFFECT: reduction of overall dimensions, providing performance of work in narrow trenches, as well as possibility of development of strong soils without transfer of external force effects to elements of working equipment.

1 cl, 4 dwg