STAND FOR EXAMINATION OF MECHANICAL GEARBOXES Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: stand has drive and loader coupled kinematically to driving and driven shafts of gearbox being examined. Loader is made as electric brake with field winding. Controllable source of DC voltage energizing the electromechanical voltage regulator is connected to field winding with its output. Moment pickups are positioned on output shafts of drive and loader. Control device consists of program unit with two outputs. It is made as multivibrator using two transistors with capacitors in their base circuits connected in parallel through switches with number of capacitors equal to number of transmission of gearbox to be examined and capacitance directly proportional to gear ratios of transmissions. Control device also includes matching amplifier, switch through which power is supplied to multivibrator and matching amplifier from external supply source, and auxiliary drive connected to one of them with its electric input. Mechanical output of auxiliary drive is coupled kinematically to axle of electromechanical voltage regulator. Control input of every electronic switch is connected to other output of program unit. Input and output are connected, respectively, to corresponding moment pickup output and to input of respective recorder. Three-pole switch is positioned between first output of program unit and electric input of auxiliary drive. Third pole of switch is connected to positive lead of external supply source. EFFECT: higher examination results. 4 dwg