Mass-compensation oscillating drive for oscillatory machines
First Claim
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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Accused Products
Abstract
Mass balance for a screen oscillating drive is provided mounting the eccentric or crankshaft assembly on extensions of the links supporting the working frame. The axis of the suspended mass m2 is spaced by a distance a2 from the pivot of the links to the base frame such that the product m2.a2, is substantially equal to the product m1.a1 where a1 is the distance between the pivot of the link to the base frame and the pivot of the links to the working frame and m1 is the mass of the working frame. The axis of the suspended mass m2 intersects the centerline of the links in the median position thereof at a normal to this centerline connecting the latter axis and the center of mass of the working frame as seen in side view.
24 Citations
5 Claims
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1. An oscillating machine, comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification