DEVICE FOR EXTRACTING MINERAL RESOURCES OR FOR DRIVING TUNNELS Russian patent published in 2006 - IPC E21C31/00 E21D9/11 F16H57/02 

FIELD: device for extracting mineral raw stock or driving mines and tunnels, possible use for extracting solid rock, such as platinum ore.

SUBSTANCE: device contains at least one driven rotary overlapping striking tool, bushing, eccentric shaft, drive, cycloid gearing and safety sleeve for cycloid gearing. Bushing is fastened in the body with possible rotation. Shaft of eccentric is connected by one end to tool and mounted in aperture of eccentric bushing with eccentricity relatively to axis of bushing and with possible rotation around axis of eccentric shaft. Driving shaft of drive is connected to bushing and to device for transferring rotation to shaft of eccentric. Cycloid gearing is positioned outside relatively to bushing and has input and output shafts, formed by eccentric shaft. Disk cam, cycloid on its external periphery, performs circular movement on external ring, having concentrically positioned roller supports. Safety sleeve is connected to external ring or tailing disk, mounted on the shaft of eccentric.

EFFECT: possible achievement of high tool speeds when using one drive in compact structure.

14 cl, 5 dwg