PLANT FOR SERVICE LINE DRIVING, GEARS TO FORM AND EXPAND HOLES, FIXTURE TO ALIGN SHAFT OF EXPANDING GEAR WITH DRIVING ROD Russian patent published in 2004 - IPC

FIELD: service line driving through artificial and natural obstacles with use of hole expanding gears. SUBSTANCE: present invention includes group of inventions forming single inventor's intention. First object of intention is plant for service line driving with rotator of shaft of expanding gear that includes planetary reduction gear. Torque is transmitted through driving rods to shaft of expanding gear either from drive gear wheel of reduction gear or from pole. Mechanism moving carriage comes in the form of chain-and-sprocket transmission arranged by circuit of carriage double travel. Second and third objects of invention are sectional expander forming holes and expander enlarging holes. Rear section of first expander comprises cylindrical rollers stabilizing direction of movement and rear section of second expander includes conical collapsible rollers fitted with additional eccentric bushings. Fourth object of invention is fixture aligning shaft of expanding gear with driving rod which is supplemented with mechanisms turning guide in vertical and horizontal planes and mechanism of its reciprocating motion. EFFECT: increased reliability and efficiency, reduced labor input to driving operations. 7 cl, 19 dwg