Spline telescopic shaft and method for manufacturing the same and vehicle steering apparatus
AssigneesJtekt Corporation, Koyo Machine Industries Co., Ltd.
InventorRyoichi Tokioka
Life of this patent
Estimating the term…
Abstract
There is provided a spline telescopic shaft having first and second shafts that are fitted to each other slidably in an axial direction. First and second splines that engage with each other are respectively provided in the first and second shafts. A resin coating that is provided on at least a tooth surface of the first spline is fitted to a tooth surface of the second spline. The resin coating is subjected to heat fitting processing for sliding the first and second shafts in the axial direction under predetermined conditions, to fit a surface of the resin coating to the tooth surface of the second spline.
Claims13
A spline telescopic shaft comprising:
- a first shaft and a second shaft that are fitted to each other slidably in an axial direction;
- a first spline and a second spline that are respectively provided in the first shaft and the second shaft and engage with each other;
- and
- a resin coating that is provided on at least a tooth surface of the first spline and is fitted to a tooth surface of the second spline,
- wherein the resin coating is subjected to heat fitting processing for sliding the first shaft and the second shaft in the axial direction under predetermined conditions, to fit a surface of the resin coating to the tooth surface of the second spline.
A method for manufacturing a spline telescopic shaft having a first shaft and a second shaft that are fitted to each other slidably in an axial direction, the method comprising;
- a surface forming step for processing a resin layer formed on at least a tooth surface of a spline in an intermediate member for manufacturing the first shaft before the surface forming step using the second shaft or a tool, to obtain a resin coating having a molded surface;
- and
- a heat fitting processing step for sliding the intermediate member for manufacturing the first shaft after the surface forming step under predetermined conditions with the first shaft manufacturing intermediate member fitted to the second shaft, to fit a surface of the resin coating to a tooth surface of the second spline in the second shaft.
Dependencies are inferred from the claim text.