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Mass-compensation oscillating drive for oscillatory machines

  • US 4,807,487 A
  • Filed: 05/14/1987
  • Issued: 02/28/1989
  • Est. Priority Date: 05/15/1986
  • Status: Expired due to Fees
First Claim
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1. An oscillating machine, comprising:

  • a base;

    a working frame of mass m1 spaced from said base;

    a plurality of links pivotally connected to said working frame and to said base for supporting said working frame for oscillating movement relative to said base; and

    an oscillating drive coupled to said working frame, said oscillating drive including;

    an extension on member formed on one of said links and extending from a first pivot means, which connects said one of said links to said base, in a direction away from a second pivot connecting said one of said links to said working frame, said first and second pivots being spaced apart by a distance a1,a motor-driven eccentric drive assembly of a suspended mass m2 mounted on said extension and having an axis located at a distance a2 from said first pivot such that the product m1 ·

    a1 is substantially equal to the product m2 ·

    a2 , said axis being located substantially at an intersection between a centerline through said first and second pivots in a median position of the oscillation range of said one of said links and a line normal to said centerline through the center of mass of the working frame andcoupling means operatively engaged with said motor-driven eccentric drive assembly so as to be displaced with the throw thereof and operatively connected to said working frame so as to actuate said working frame with said throw.

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