Chain sprocket with increased load capacity

  • US 8,096,528 B2
  • Filed: 05/25/2007
  • Issued: 01/17/2012
  • Est. Priority Date: 08/01/2006
  • Status: Active Grant
First Claim
Patent Images

1. A chain sprocket for driving a link chain in which each chain link comprises a bent wire and has a flat shape including two mutually parallel sections and two semicircular arcs, the chain sprocket comprising:

  • a base body having an outer circumferential surface and an axis of rotation,a plurality of first chain pockets situated in the outer circumferential surface for receiving horizontal chain links of the link chain and for transferring power from the chain sprocket to the horizontal chain links;

    a plurality of second chain pockets situated in the outer circumferential surface for receiving vertical chain links of the link chain, the second chain pockets corresponding in number to the first chain pockets for the horizontal chain links, each second chain pocket having support areas for the vertical chain links and against which at least a part of one of the parallel sections of the respective vertical chain link can bear;

    each second chain pocket being arranged between and intersecting each two adjacent first chain pockets for the horizontal chain links;

    a plurality of teeth with each being arranged between each two adjacent second chain pockets for the vertical chain links for transmitting force from the chain sprocket to the vertical chain links, each tooth being bounded by two tooth flanks that face in a circumferential direction of the base body;

    at least one of the two tooth flanks of each tooth comprising a load-receiving tooth flank that faces opposite a load direction of the link chain when the chain sprocket is being used;

    each load-receiving tooth flank defining a tooth flank line of curvature in a symmetry plane of the second chain pockets for the vertical chain links that is perpendicular to the axis of rotation, the tooth flank line of curvature approximately corresponding to a curved profile of an outer line of the adjacent semicircular arc, facing in the load direction, of a vertical chain link that is situated in the respective second chain pocket; and

    wherein the load-receiving tooth flank is positioned such that its tooth flank line of curvature, measured in the symmetry plane, is separated by a distance, at least in an area of a tip of the tooth, from an outer line of the semicircular arc of a link chain situated in the respective chain pocket, if the two adjacent chain links are centered and lie in their associated chain pockets without being acted on by an external force and there is no play between the chain links.

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