REDUCTION GEAR FOR BORING OF RESTORED MAIN BEARING SADDLES OF CYLINDER BLOCKS OF INTERNAL-COMBUSTION ENGINE Russian patent published in 2015 - IPC B23B41/12 

FIELD: machine building.

SUBSTANCE: device contains body with geared machinery, boring shaft and intended for installation in the outermost saddle of the cylinder block of the base flange ensuring alignment of the passing though it boring shaft with other saddles of the cylinder block, and on which the casing is secured. To increase boring quality it is equipped with insert block, in which the boring shaft passes, and with reversible drive gear located in the casing and containing block of cone pinions and two series pairs of cylindrical gears with various ratio. At that the driven bevel pinion is intended to transit rotation and reverse to the specified pairs of cylindrical gears and to insert block installed in the hub of the cylindrical gear, intended for the boring shaft rotation using the spline joint, and in hub of the cylindrical gear intended for the boring shaft feeding using the tread joint.

EFFECT: increased quality of boring.

2 cl, 2 dwg