Title:
RACK SHAFT, STEERING DEVICE AND MANUFACTURING METHOD OF RACK SHAFT
Document Type and Number:
Japanese Patent JP2017032078
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a rack shaft which is excellent in durability without the necessity for correcting the warpage of an end part region including both end parts of a region in which a rack tooth row in a longitudinal direction of the rack shaft are arranged, a steering device using the rack shaft, and a manufacturing method of the rack shaft.SOLUTION: A rack shaft 3 has a hollow shaft-shaped shaft part 30, and a rack tooth row arranged at a part of a peripheral region in a prescribed range of the shaft part 30 in a longitudinal direction, and is applied with quenching treatment and tempering treatment. A cross section area of the shaft part 30 at a cross section orthogonal to the longitudinal direction of the shaft part 30 is constant in an end part region 3b including both end parts of a region in which the rack tooth row is arranged, and in an intermediate region 3a including a center part of the region in which the rack tooth row is arranged, the cross section area of the shaft part 30 is formed smaller than a cross section area of the end part region 3b.SELECTED DRAWING: Figure 5
Inventors:
ITO AKINORI
TSUTSUI TERUO
HIROSE KEI
TSUTSUI TERUO
HIROSE KEI
Application Number:
JP2015153121A
Publication Date:
February 09, 2017
Filing Date:
August 03, 2015
Export Citation:
Assignee:
JTEKT CORP
International Classes:
F16H55/26; B21D3/10; B62D3/12; C21D9/32; F16H19/04
Attorney, Agent or Firm:
Tadao Hirata
Takashi Nomiyama
Hiroyuki Ito
Takashi Nomiyama
Hiroyuki Ito