DRILLING MACHINE Russian patent published in 2002 - IPC

FIELD: mining industry and construction engineering, particularly, percussive-rotary drilling machines. SUBSTANCE: drilling machine has base, drilling head with end cam, spring-loaded pushing striker, spindle and lead screw. Drilling machine is provided with the first centrifugal regulator with kinematic connection in the form of rack-and-gear drive with drilling head and central bushing disconnecting the engine in case of drill jamming, the second centrifugal regulator with kinematic connection similar to that of the first centrifugal regulator but with ratchet surface of central shaft and central bushing having pawls, and kinematically connected with the third centrifugal regulator disconnecting the kinematic chain from engine to loading device having rope connection with disc integral with disc cam of increasing radius and receiving rotary motion from engine. Drilling machine has toothed variable-speed drive rotated by lead screw. Toothed variable-speed drive has drawn dowel movable through link chain from the second centrifugal regulator with the help of lead screw nut. EFFECT: reduced labor input in servicing and time consumption for replacement of machine components. 1 dwg