Title:
RACK SHAFT FOR STEERING DEVICE AND MANUFACTURING METHOD THEREFOR, AND STEERING DEVICE
Document Type and Number:
Japanese Patent JP2023108848
Kind Code:
A
Abstract:
To provide a rack shaft for a steering device having a rack side slide plane which elongates in the axial direction and in which an axial end overlaps a female screw hole in the radial direction at both ends of an object rack in the tooth width direction, and being easy to ensure the peripheral wall thickness of the female screw hole, and a manufacturing method therefor, and a steering device with the rack shaft,.SOLUTION: A first shaft part (an assist side shaft part 55) includes: a first female screw hole (an assist side female screw hole 58), an object rack (an assist side rack 29), a rack side slide plane 59, and an overhanging surface part 60 which is at a second side end in the axial direction and projects further outward than the object rack (29) in the radial direction at a portion to be in phase with the object rack (29) in the circumferential direction of an outer-peripheral surface in an axial range including an axial range in which at least the first female screw hole (58) exists.SELECTED DRAWING: Figure 9
Inventors:
MORIMOTO MASAKI
Application Number:
JP2022010116A
Publication Date:
August 07, 2023
Filing Date:
January 26, 2022
Export Citation:
Assignee:
NSK LTD
International Classes:
B62D5/04; B62D3/12; F16H1/12; F16H55/26
Attorney, Agent or Firm:
Kiwa Patent Office
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