Patent ID: 8267585
Filing Date: 2012-09-18
Classification: F16C

Abstract:
1. A chain for a linear motion transmission apparatus, comprising a plurality of spacers and two links for connecting the spacers together; wherein: the two links are located at both sides of the respective spacers in an axial direction of an elongated shaft of the linear motion transmission apparatus, each two neighboring spacers define a holding space with respect to the links for holding the rolling elements, each of the spacers is provided at both end surfaces thereof in the axial direction of the elongated shaft of the linear motion transmission apparatus with a plurality of holding protrusions which are each provided with a holding surface for holding the rolling elements, each of the holding surfaces is inclined at an angle from a center of each of the spacers toward a peripheral edge thereof in such a manner that a distance between outer ends of two opposite holding surfaces on two neighboring spacers is smaller than a diameter of the rolling elements, while a distance between inner ends of the two opposite holding surfaces on two neighboring spacers is larger than the distance between the outer ends of two opposite holding surfaces on the two neighboring spacers; the holding protrusions of the chain are annularly arranged in 120 degree intervals in such a manner that the holding protrusions on the same side of each spacer are alternatively arranged in a direction which is vertical to the links, and two of the holding protrusions are arranged in a line parallel to a direction of the links.