Rotational positioning institution

The utility model discloses a rotational positioning institution belongs to the mechanical equipment field. This rotational positioning institution includes first work piece and second work piece, thefirst setting element of setting on first work piece is provided with first location portion on the first setting element, the second setting element of setting on the second work piece is provided with second location portion on the second setting element, first work piece and second work piece are through the pivot pin joint, when rotating first work piece or second work piece, first location portion and the 2nd positioning phase constitute the location to rotating or mutually supporting. This rotational positioning institution through set up two setting elements can enough realize two workpieces in ascending rotation in circumference side and location, it is the mechanical type location, spatial structure's size can be adjusted according to the demand, can design into little spatial structure, the product part