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Title:
HOLLOW RACK BAR AND METHOD FOR MANUFACTURING HOLLOW RACK BAR
Document Type and Number:
Japanese Patent JP2017060964
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To enhance a strength of a hollow rack bar provided with a screw hole.SOLUTION: A hollow rack bar 2 comprising a tubular shaft material 10, in which a part of the shaft material 10 in an axial direction is provided a tooth part 11 having plural rack teeth 12, and ends 13 of the shaft material 10 on both sides in the axial direction are respectively provided with a screw hole 14. The hollow rack bar is manufactured in such a manner that the end 13 of the shaft material 10 provided with the tooth part 11 is compressed in the axial direction, a cross section, which is perpendicular to the axial direction, in at least a part of the end 13 in the axial direction is increased, and the screw hole 14 is formed on an inner periphery of the end 13 having the increased cross section.SELECTED DRAWING: Figure 3

Inventors:
YAMAWAKI TAKASHI
SUZUKI RYOSUKE
Application Number:
JP2015187124A
Publication Date:
March 30, 2017
Filing Date:
September 24, 2015
Export Citation:
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Assignee:
NETUREN CO LTD
International Classes:
B21K1/76; B21J5/08; B62D3/12; C21D7/02; C21D9/32; F16H19/04
Attorney, Agent or Firm:
Patent Business Corporation Koei Patent Office
Takeshi Takamatsu
Toshiyuki Ozawa