EXCAVATOR Russian patent published in 2023 - IPC E02F3/28 E02F9/12 

FIELD: earth-moving equipment.

SUBSTANCE: invention is related to single-bucket excavators. The excavator contains a non-rotating part with running equipment connected to a rotary platform on which the power unit is installed, a rotating cabin with a rotation and lifting drive, mounted in a cantilever with the ability to extend on a telescopic rotary column located along the axis of the rotary platform. The excavator is equipped with an additional rotary platform with a rotation drive, on which working equipment is installed, including a boom, handle, and bucket. The drive of the platform with the power plant is designed to automatically stabilize the opposite position of the power plant relative to the working equipment during periods of soil being collected into the bucket. The hydraulic cylinders of the boom and arm drive are equipped with pressure switches, respectively, connected to the piston cavities, and the contacts of the mentioned pressure switches are connected in series with the contacts of the travel switches in the power supply circuit of the hydraulic distributor of the rotary platform drive with the power unit. The electrical control lines of the hydraulic distributor are separated by diodes, and the hydraulic distributor of the drive of the additional rotary platform with installed working equipment is configured to control the switch.

EFFECT: increased productivity and reduced energy costs for acceleration and braking.

1 cl, 3 dwg