Vibrating screen mechanism with three-dimensional independent output motion

Abstract

The invention provides a vibrating screen mechanism with three-dimensional independent output motion. The vibrating screen mechanism comprises a screen frame, a rack and first, second and third branched chains with the same structures, wherein one end of a second member of the first branched chain is connected with the screen frame through a first sphere pair; the other end of the second member is connected with one end of a first member through a second revolute pair; the other end of the first member is connected with the rack through a first revolute pair; one end of a third member of the second branched chain is connected with the screen frame through a second sphere pair; the other end of the third member is connected with one end of a fourth member through a third revolute pair; the other end of the fourth member is connected with the rack through a fourth revolute pair; one end of a fifth member of the third branched chain is connected with the screen frame through a third sphere pair; the other end of the fifth member is connected with one end of a sixth member through a fourth sphere pair; the other end of the sixth member is connected with the rack through a fifth revolute pair; and the shaft lines of the first to the fifth revolute pairs are parallel to each other. When the motion of the three revolute pairs on the rack is controlled, the screen frame can obtain an independent translation and two independent rotation outputs; and the vibrating screen mechanism is simpler in structure and easy to manufacture and process.

Description

technical field

[0001] The invention relates to a three-dimensional motion vibrating screen mechanism, in particular, it provides a new type of three-dimensional motion mechanism for parallel structure parallel motion vibrating screens, parallel motion entertainment equipment, parallel robots and the like. Background technique

[0002] At present, the most typical traditional vibrating screens are mainly circular vibrating screens and linear vibrating screens. Vibrations are generated by inertial exciters, and the structure is complex. Insufficient turnover of materials, the sieve holes are easily stuck by "sieve grains", resulting in low screening efficiency. Patent application number 2006100881264 provides a two-degree-of-freedom space mechanism for parallel kinematic equipment. The output motion of the platform is a translation and a rotation, and one of the motions is not independent and non-controllable. In this way, In the case where three independent output movements...

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