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Cam-driven rotary pick-and-place assembly apparatus

  • US 4,403,907 A
  • Filed: 08/18/1981
  • Issued: 09/13/1983
  • Est. Priority Date: 08/18/1981
  • Status: Expired due to Term
First Claim
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1. Material handling apparatus for transferring a workpiece from a first work station to a second work station, comprising in combination:

  • a housing;

    an input shaft rotatably supported by said housing;

    motor means providing a constant speed rotation to said input shaft;

    driving cam means carried by said input shaft intermediate the ends thereof, said driving cam means comprising a first cam member and a second cam member;

    follower wheel means rotatably supported by said housing and having a pair of spaced parallel bores formed therein along a first direction, said follower wheel means carrying a plurality of cam followers engaged with said first cam member, whereby rotation of said input shaft causes said first cam member to affect timed rotary oscillation of said follower wheel means along a second direction, said second direction being in a plane normal to the plane of said first direction;

    follower wheel lift shaft means rotatably supported by said housing and having a radially-extending lift shaft clevis, said follower wheel lift shaft means carrying a plurality of cam followers engaged with said second cam member, whereby rotation of said input shaft causes said second cam member to effect timed oscillation of said follower wheel lift shaft means whereby said lift shaft clevis is oscillated along said first direction;

    output shaft means slidably mounted within said spaced parallel bores of said follower wheel means and operable to be linearly oscillated along said first direction, said output shaft means further operable to be rotatably oscillated with said rotatably-driven follower wheel means along said second direction, said output shaft means characterized as comprising a center guide shaft and an outer guide shaft joined at their respective lower ends by connector means;

    toggle linkage assembly means operatively connecting said follower wheel lift shaft means with said output shaft means, said toggle linkage assembly characterized as being rotatably connected to said connector means and pivotally connected to said lift shaft clevis;

    whereby said toggle linkage assembly, in response to oscillation of said lift shaft clevis, transfers linear oscillation along said first direction to said connector means and thereby to said center and outer guide shafts, while said toggle linkage assembly, when said guide shafts are rotatably oscillated by said rotatably-driven follower wheel means, permits rotation along said second direction between said lift shaft clevis on the one hand and said connector means and said center and outer guide shafts on the other hand.

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