MINE EXCAVATOR AND ITS ROTATION AND ROLLING SUPPORT DEVICE Russian patent published in 2017 - IPC E02F9/08 E02F9/12 

FIELD: construction; mining.

SUBSTANCE: group of inventions relates to mining and construction. Mine excavator comprises rotation and rolling support device for connection of upper and lower mechanisms. Rotation and rolling support device comprises roller device, ring gear wheel and upper roller path, lower roller path and independent side roller path to limit roller device rollers rotation. At that, upper roller path is fixedly attached to upper mechanism main rotary platform lower part, and lower roller path and side roller path are located on ring gear wheel upper part, located below roller device. Ring gear wheel has upper flat part on upper surface of which lower roller path and side roller path are located, annular toothed part and lower flat part fixedly fixed to lower mechanism bearing frame beam. At that circular toothed section is located on ring gear wheel side surface and relatively outside of upper flat part. Side roller path is connected with possibility of disconnection with lower roller path upper flat part upper surface. At that, upper roller path, lower roller path and side roller path are composed of segmented roller tracks, and contact surfaces between adjacent segmented roller tracks are inclined surfaces.

EFFECT: ease of excavator servicing, reduced time and labor input during replacement of worn-out parts.

7 cl, 15 dwg