Internal mechanism Void Cube

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disassembled void cube.


the parts of void cube are:



20 cubies

8 corner cubies
12 edge (middle) cubies


6 internal support pieces square hole through them
12 mostly-hidden internal sliding pieces several functions

essentially, frame of mechanism comprises 6 identical pieces square holes (the ones can through). part of interior of each hole inside surface of these pieces. 1 of them lying separately on work surface, exterior side facing up. if straight down @ 1 of these pieces (so line of sight parallel face s rotational axis) exterior square.


seen more-typical oblique position, however, each side of square piece akin low arch joins neighboring corners. low part of arch engages mostly-hidden internal sliding pieces (among other functions) support edge cubies. high surface of arch includes convex curved circular flanges engage grooves inside cubies, hold structure together.


when faces of puzzle in normal aligned state, these 6 pieces akin sides of internal cube. each 1 free rotate without obstruction other 5 pieces. when face rotated, own square piece rotates face s cubies, square piece s own flanges not move relative cubies.


what retains cubies when face rotated set of 4 curved flanges on 4 neighboring square-hole pieces. grooves inside cubies fit on flanges. edge cubie grooves engage flanges on neighboring square pieces, keeping them together.


as described far, however, individual parts of mechanism move out of position easily. each edge of puzzle therefore includes mostly-hidden sliding piece (already mentioned) complex shape includes curved dovetail surface. surface widest @ innermost extension, , in center of piece along length. dovetail of piece, acting wedge, keeps neighboring square pieces spaced apart.


keeping square pieces apart ensures grooves inside cubies stay engaged flanges. close manufacturing tolerances result in sufficient friction keep parts of puzzle moving on own, still allow easy movement.


edge cubies fit onto positioning lugs on exteriors of these internal sliding pieces, rotating face makes edge cubies push sliding pieces around in circle. interior surfaces face inward toward hole drive face s square piece rotates cubies.


the square pieces ensure these internal sliding pieces stay toward edges of puzzle.


edge cubies in normal position retained flanges of neighboring square pieces. corner cubies retained trio of short circular flanges @ ends of interior sliding pieces. when face rotated, short flanges temporarily retain edge cubies, particularly when face rotated 1/8 of turn (roughly 45 degrees). well, corner cubies temporarily retained curved flanges on neighboring square pieces. during rotation, flanges change roles cubies travel along circular paths.







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