CUTTING APPARATUS Russian patent published in 2019 - IPC E21C27/24 

FIELD: soil or rock drilling; mining.

SUBSTANCE: invention relates to tunneling machines. Tunneling machine suitable for creating tunnels or subterranean roadways comprises a main frame; first and second supports, rotatably mounted relative to the main frame; at least one first and second support actuator; a first and a second arm, each pivotally mounted to the respective first and second support via a respective arm pivot axis aligned in a direction extending transverse, including perpendicular to each support pivot axis to enable the first and second arms to pivot independently of one another and to pivot relative to each of the respective first and second supports in an upward and downward direction; at least one first and second arm actuator to actuate independently pivoting of the first and second arms; a rotatable cutting head mounted at each of the first and second arms, each head rotatable about a head axis, orientated to extend substantially transverse to each respective arm pivot axis.

EFFECT: technical result is high efficiency of penetration of solid rock with a hardness exceeding 120 MPa.

21 cl, 7 dwg