Single pin rocker joint CVT chain

A power transmission chain constructed of an assembly of sets of interleaved links an pivot members, each link having a pair of spaced apertures, the apertures of one link set being transversely aligned with one set of apertures of the next adjacent link set, the apertures being defined by a series of surfaces,

• the chain including a plurality of sets of guide row links interleaved with sets of non-guide row links, the apertures within the guide row links have at least one curved surface and the apertures within the non-guide row links have a plurality of curved surfaces, at least one of the non-guide row link aperture surfaces being convexly arcuate,
• the sets of non-guide row links include a load block member oriented transversely to the links,
• the pivot members having a substantially flat front surface and a convex back surface, the pivot members being received in the apertures of each of the guide row links such that the pivot member back surface engages the curved surfaces defined by the guide row links thereby preventing substantial rotation of the pivot member relative to the guide row links,
• the pivot member being received in the apertures of the non-guide row links such that the front surface of the pivot member and the convexly arcuate surface of the non-guide row link aperture engage and rock on one another,
• the back surface of the pivot member being positioned for clearance from the non-guide row link aperture back surface as the surfaces move relative to one another as the chain articulates.

A rocker joint for a chain constructed of an assembly of links and pivot members, the chain comprising a plurality of sets of interleaved links, each link having a pair of spaced apertures, the apertures of one link set being transversely aligned with one set of apertures of the next adjacent link set, the apertures being defined by a series of surfaces,

• the chain including a plurality of sets of guide row links interleaved with sets of non-guide links, the sets of guide row links having pairs of flanking guide links located on the outside of the sets of guide row links, the apertures within the guide row links have at least one curved surface and the apertures within the non-guide row links have a plurality of curved surfaces, wherein the apertures of the non-guide row links include at least two convex curves, each of the convex curves being defined by a radius having a center point, the centers of the radii each being on the same side of the aperture,
• at least some of the sets of links including a load block member oriented generally transversely to the links,
• the pivot member having a substantially flat front surface and a convex back surface, the back surface being defined by a plurality of radii,
• the pivot member being received in the apertures of the flanking guide links such that the pivot member back surface engages the curved surfaces defined by the flanking guide links thereby preventing substantial rotation of the pivot member relative to the flanking guide links,
• the pivot member being receive din the apertures of some of the non-guide row links such that the front surface of the pivot member and the convexly arcuate surface of the inside link aperture engage and rock on one another, and
• the back surface of the pivot member being positioned for clearance from the non-guide row link aperture back surface as the surfaces move relative to one another as the chain articulates.