NOTCHING POINTED SPADE WITH SUPPORT LEVER OF DESIGN BY ZEMLYAKOV Russian patent published in 2013 - IPC A01B1/02 

FIELD: agriculture.

SUBSTANCE: spade is made of a metal web which is plain-bent along the axis at the side of the front surface. In the lower part of the web the cutting edge is made having a pointed shape. At the upper part of the web symmetrically from its axis at the edges there are two support flaps - left and right - for leg support. The flaps are folded toward the back surface of the web. Along the axis of the web between the flaps there is a tubular cylindrical holder with the wooden handle fixed on it. On the upper end of the wooden handle the transverse handlebar is mounted which axis is disposed at a right angle relative to a provisional plane of parallel front surface of the spade web. The left and right support flaps are rigidly attached to the flat trellis support lever. The support lever is mounted at right angle β relative to the back surface of the spade web. The support lever has a width equal to the width of the spade web and a console length equal to the value z. The support lever is designed as a bracket-shaped metal arc having ends of equal length, made in the form of two longitudinal rods. The middle part of the bracket-shaped metal arc is made in the form of a transverse pivotal plank. The ends of the longitudinal rods are rigidly fixed to the left and right support flaps of the web from the side of their lower surfaces. In the middle part of the transverse pivotal plank a movable flat ring is mounted. The lateral side of the ring is rigidly attached to a lower end of the shaft thrust rod. The upper end of the rod is provided with a plane-concave plate having a through hole through which the fastening element is installed, attached to the handle of the shovel. The lower surfaces of the left and right support flaps of the shovel web the additional rods are fixedly secured with the front ends. The rear ends of the additional rods are fixedly secured to the transverse pivotal plank in the bottom, at that two of them are installed on the right and left from the flat ring with a minimal axial gap f. Over the head of the fastening element with its complete overlapping the tubular ring is mounted with interference covering the handle and the head of the fastening element.

EFFECT: increased performance with lower user fatigue.

3 cl, 7 dwg