TUBE EXPANDING MACHINE Russian patent published in 1997 - IPC

FIELD: power apparatuses for expanding tubes at making and repairing heat exchange equipment in power machine engineering, chemical, oil and gas industry branches. SUBSTANCE: machine includes housing in which planetary gearing and spindle shaft are mounted and drive mechanism whose shaft is rigidly connected with drive pinion of planetary gearing. Planetary gearing and spindle shaft are kinematically connected one with another by alternatively engaging driven gear wheels of intermediate reduction gear. Gear wheels are rigidly secured to spindle shaft mounted on axial compression spring with possibility of axial motion in supporting bearings as in guides. Driven gear wheel of intermediate reduction gear is mounted on shaft of carrier. Novelty is spindle shaft mounted in parallel with axis of planetary gearing, intermediate reduction gear has cylindrical teeth, crown gear of planetary gearing is mounted in bearings and it is provided with external cylindrical toothed rim being second pinion of intermediate reduction gear. Two locking gears are mounted in bearings on spindle shaft. Gears are rigidly connected one with another and with rotation limiters arranged between them and being, for example, in the form of rings joined with radially arranged plate engaging in its limit positions with adjustable spring-loaded rests on mutually opposite lateral walls of housing. Distance between outer ends of external toothed rim of crown gear and pinion of intermediate reduction gear is more than distance between outer ends of external toothed rim of crown gear and pinion of intermediate reduction gear on shaft of carrier by axial displacement value of spindle shaft. EFFECT: improved design. 6 cl, 2 dwg