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Patent Searching and Data


Title:
RACK AND MANUFACTURING METHOD FOR SAME, STEERING DEVICE, VEHICLE AND PREFORMING MOLD FOR RACK
Document Type and Number:
WIPO Patent Application WO/2019/049477
Kind Code:
A1
Abstract:
According to the present invention, an intermediate material (18a) is obtained which has, on a radial inside portion of an outer circumferential surface thereof, a recess groove (42) which axially extends and is recessed radially inward. In a state in which, on the outer circumferential surface of the intermediate material (18a), both side portions of a recess groove (42y) are constrained with respect to the circumferential direction and the inner surface of the recess groove (42y) is not constrained, a teeth-forming protrusion-and-recess part (28) having a protrusion-and-recess shape in the axial direction is firmly pressed against a surface which, on the outer circumferential surface of the intermediate material (18a), is on the opposite side of the recess groove (42y) with respect to the radial direction, thereby forming a plurality of rack teeth (10z).

Inventors:
MIZUSHIMA, Yuuki (1-5-50 Kugenumashinmei, Fujisawa-sh, Kanagawa 01, 〒2518501, JP)
KOBAYASHI, Tatsuya (1-5-50 Kugenumashinmei, Fujisawa-sh, Kanagawa 01, 〒2518501, JP)
Application Number:
JP2018/024460
Publication Date:
March 14, 2019
Filing Date:
June 27, 2018
Export Citation:
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Assignee:
NSK LTD. (6-3 Ohsaki 1-chome, Shinagawa-ku Tokyo, 60, 〒1418560, JP)
International Classes:
F16H55/26; B21J5/02; B21J13/14; B21K1/76; B62D3/12
Domestic Patent References:
WO2016031323A12016-03-03
Foreign References:
JP2011255834A2011-12-22
JPS6444501A1989-02-16
Attorney, Agent or Firm:
KIWA INTERNATIONAL (SKI Toranomon 5F, 2-13-10 Nishi-Shimbashi Minato-k, Tokyo 03, 〒1050003, JP)
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