METHOD TO FORM TRAJECTORY OF DRAGLINE MINE EXCAVATOR BUCKET AND WORKING EQUIPMENT FOR ITS REALISATION Russian patent published in 2013 - IPC E21C47/00 

FIELD: mining.

SUBSTANCE: method to form a trajectory of excavator bucket motion is carried out with the help of an operation of putting a handle with the bucket into backward motion in the vertical plane in a system of coordinates connected to a boom. At the same time the axis of handle rocking in the specified system of coordinates is fixed. The operation of trajectory curvature control is carried out by change of the distance between the bucket and the axis of handle rocking. At the same time the handle rocking axis fixed in the system of coordinates connected to the boom is moved in the system of coordinates connected with the handle along the circumference arc, the centre of which is at the end of the handle. The proposed method is realised by working equipment comprising a boom, a handle with a bucket rigidly installed on it, a rope mechanism of bucket lift and a discharge mechanism. Besides, the discharge mechanism comprises a yoke, which forms rotating couples with the boom and the handle, and a hydraulic cylinder, the stem and body of which are connected hingedly with the yoke and handle accordingly.

EFFECT: simplified design of a discharge mechanism, at the same time possibility is provided to adjust bucket movement trajectory.

2 cl, 3 dwg