Patent ID: 7500413
Filing Date: 2009-03-10
Classification: B60Q,F16H,Y10T

Abstract:
1. A step-by-step motor able to carry out up-and-down motion comprising: a housing formed with an accommodating chamber in the interior, said accommodating chamber disposed therein with a recessed chamber, said recessed chamber having its inner wall provided with engage projections, said recessed chamber provided with a central insert hole passing through a topside of said housing, said insert hole having its wall bored with lengthwise positioning engage notches spaced apart, said recessed chamber having one side disposed with a shaft hole having its outer circumference fixed with a blocking plate, said accommodating chamber having its inner wall assembled with a positioning plate with a notch, said housing having its outer peripheral wall formed with a plurality of engage projections spaced apart; a driven gear received in said accommodating chamber of said housing, said driven gear having its upper side formed with a connecting block, said connecting block received in said recessed chamber of said housing, said connecting block bored with a central insert hole, said central insert hole having its lower section provided with female threads, said connecting block having its outer circumferential wall provided with an annular recess, said connecting block cut with two opposite notches; a worm gear positioned at one side of said driven gear, said worm gear having its upper side fixed with a transmitting gear, said transmitting gear engaged with said driven gear, said transmitting gear provided thereon with a support shaft; an interacting member inserted in both said insert hole of said driven gear and said insert hole of said housing, said interacting member having its outer circumferential wall provided with male threads, said interacting member having its upper outer wall formed with a plurality of lengthwise projections spaced apart equidistantly, said interacting member having its lower side fixed with an interacting block with an engage notch, said interacting member bored with a central insert hole, said central insert hole disposed therein with plural engage blocks near the lower end; a top rod inserted through said central insert hole of said interacting member, said top rod having its upper section provided with male threads, said top rod having its wall fixed with a blocking flange, said top rod bored with an annular recess near the lower end, said engage blocks of said interacting member engaged with said annular recess of said top rod, said top rod having its lower end formed with a polygonal rod; a circuit board installed in said accommodating chamber of said housing, said circuit board provided thereon with a position-limiting switch with a movable cross bar, said circuit board assembled thereon with a transmitting motor mounted thereon, said transmitting motor provided with a worm engaged with said worm gear; a cover body covered on the bottom of said housing, said cover body formed with a recessed chamber in the interior, said recessed chamber having its circumferential wall bored with through holes, said recessed chamber bored with an insert hole at the bottom, said cover body having its outer peripheral edge bored with a plurality of engage slots, said cover body assembled with a bayonet socket at the underside; and an adjusting member positioned in said recessed chamber of said cover body, said adjusting member bored with a polygonal recessed hole in the center, said adjusting member having its lower circumferential edge annularly cut with lots of engage notches, said adjusting member secured with a projecting post extending downward from the bottom, said projecting post having its lower side cut with a slit.