PLANETARY WORKING MEMBER Russian patent published in 1995 - IPC

FIELD: mining; applicable in making holes. SUBSTANCE: planetary working member has carrier 9 with main satellites 9 installed on it. Main satellites 8 are engageable with sun gear 10 with inner teeth. Installed on spindle are rock cutting tools 3. Arranged between satellites 8 are additional satellites 11 and are engageable with them. Spindles of rock cutting tools 13 are connected with shafts 12 of additional satellites 11 installed on carrier 9. Spindles of rock cutting tools 13 may be installed in holder 14 connected with carrier 9. During rotation of geared motor each additional satellite 11 undergo considerable tangential reaction force from rock cutting tools and is engageable with two main satellites 8 located on both sides. This provides for participation in engagement of double number of teeth of each satellite connected with spindle. Distribution of load of double number of teeth allows manufacture of drive with smaller transverse sizes, that in its turn, allows its use in devices for making slim holes. EFFECT: higher reliability in operation due to increased uniformity of working the hole bottom. 2 cl, 2 dwg