Title:
ラックバー及びステアリング装置
Document Type and Number:
Japanese Patent JP7306027
Kind Code:
B2
Abstract:
A rack bar (11) includes: a rack tooth row (112) including a plurality of rack teeth (111) meshing with pinion teeth (9a); a hardened layer (K) provided continuously over an entire circumference of the rack tooth row (112); and a center portion (S) provided inside the hardened layer (K) and having lower hardness than the hardened layer (K). When the rack bar (11) is viewed in an axial direction of the rack bar (11), a depth of the hardened layer (K) from the following positions i), ii), and iii) increases in this order: i) a bottom land (111v) of the rack teeth (111); ii) a side (Ills) of the rack bar (11) relative to the bottom land (111v); and iii) a back (111b) of the rack bar (11) relative to the bottom land (111v).
Inventors:
Yoshiaki Izumi
Hiroshi Iwami
Isao Torii
Hiroshi Iwami
Isao Torii
Application Number:
JP2019070882A
Publication Date:
July 11, 2023
Filing Date:
April 02, 2019
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
F16H55/26; B62D3/12; C21D1/10; C21D1/42; C21D9/32
Domestic Patent References:
| JP2014133929A | ||||
| JP11270657A | ||||
| JP57193446U |
Attorney, Agent or Firm:
Patent Attorney Corporation Aichi International Patent Office
Patent Attorney Corporation Kyoritsu Patent Office
Patent Attorney Corporation Kyoritsu Patent Office