DEVICE TO MOUNT DRILLING BIT LEG Russian patent published in 2009 - IPC B23C9/00 

FIELD: mechanics.

SUBSTANCE: proposed device comprises casing with locator mechanism furnished with three parallel-axes pins, clamping mechanism with transfer links from drive assembly. The pins axes are aligned with vertices of isosceles triangle. Two of the said rods are small-diameter cylindrical rods have their axes aligned with vertices of triangle base. The third rod represents complete sphere with the vertex of its height. Note here that sizes of the base and height feature the ratio of h/b = 3 to 6, where h, b are length of height and base, respectively. End: of smaller rods are arranged in one plane parallel to the casing base with the difference relative to the larger pin vertex. The smaller pins are attached on the first platform and the larger pin seats on the second platform, both platforms being mounted on the casing so that to allow adjusting the lengthwise position relative to each other along the casing lengthwise axis of symmetry perpendicular to its base. Note that clamping mechanism represents L-like plate moving in the casing guides in direction perpendicular to its base. This plate is jointed by the said transfer links representing two L-like two-arm levers pivoted together by the plate. The plate is also jointed to the plunger moving in the casing and bolted to the drive assembly.

EFFECT: higher accuracy of orientation.

5 dwg, 1 ex