Patent ID: 9163655
Filing Date: 2015-10-20
Classification: F16B

Abstract:
1. A thrust nut comprising: a nut main body of which an outer wall is formed into a polygonal shape and that has a slanted hole of which an inner diameter becomes successively smaller, and a small-diameter end portion having about a circumference of said small-diameter end portion a plurality of stepped portions of differing height so that said slanted hole has a differing depth relative to a large-diameter end portion of the slanted hole at a plurality of locations about a circumference of the slanted hole; a plurality of nut segments that are slidable within the slanted hole of the nut main body, each one of the plurality of nut segments having a small-diameter side that comes into contact with at least one of said plurality of stepped portions, and each one of the plurality of nut segments having a pressing projection piece formed at a large-diameter side of said one nut segment; a respective set of screw thread portions formed on an inner wall surface of each one of said plurality of nut segments, said respective set occurring from said large-diameter side to said small-diameter side of said one nut segment and including a thread portion extending to said small diameter side that is in contact with said at least one stepped portion; a washer that is provided at the large-diameter side of the plurality of nut segments; a bias spring that is attached within the nut main body such as to urge the plurality of nut segments towards the small-diameter side at all times with the washer therebetween; and a stopper piece, in which a bolt insertion hole is formed, that holds the bias spring within the nut main body and is attached to the nut main body.