GEAR MEASURING PARAMETERS OF DEEP HOLES Russian patent published in 2002 - IPC

FIELD: measurement technology. SUBSTANCE: proposed gear has working part in the form of hollow cylindrical body with holes made over perimeter for installation of measurement supports movable in radial direction. One end of each support is designed for interaction with tested surface and the other end constantly contacts tensor beam located in body. Gear is equipped with measurement systems to register change of positions of measurement supports. It is also provided with guiding bushing for extending rod uniaxially joined to body in its tail part. Guiding bushing has supports moving apart in radial direction to put and hold body of gear on initial axis of tested hole and space in body of bushing on side of its bearing butt to place body in initial position. Adjustable supports are located in grooves radially arranged from outer side surface of bushing having outer conical surface and closed by limiting bushing with proper conical surface. Limiting surface is made fast to guiding bushing. EFFECT: expanded functional capabilities of gear and its versatility. 3 cl, 3 dwg