Title:
SUPPORT SHAFT FOR TOROIDAL-TYPE CONTINUOUSLY VARIABLE TRANSMISSION AND MANUFACTURING METHOD OF SUPPORT SHAFT
Document Type and Number:
Japanese Patent JP2022088755
Kind Code:
A
Abstract:
To provide a support shaft for a toroidal-type continuously variable transmission which can simultaneously perform the removal of an excess thickness of a male screw part arranged at an end part of the support shaft, and the finish processing of the male screw part, and a manufacturing method of the support shaft.SOLUTION: A support shaft 100 has a male screw part 102 which is applied with carburetion quenching, and not applied with the carburetion quenching at an end part, and an escape part 103 coaxial with the male screw part 102 at an end face 102a of the male screw part 102. Since the escape part 103 is smaller than a trough diameter D of the male screw part 102 in a diameter, and longer than a depth d of a carburetion-quenched hardening layer 101b from an end face of the escape part 103 in a length L in an axial direction, the removal of an excess thickness of the male screw part 102 arranged at an end part of the support shaft 100, and the finish processing of the male screw part can be simultaneously performed.SELECTED DRAWING: Figure 1
Inventors:
ITO YASUO
KITA MASAHIRO
KITA MASAHIRO
Application Number:
JP2020200756A
Publication Date:
June 15, 2022
Filing Date:
December 03, 2020
Export Citation:
Assignee:
NSK LTD
International Classes:
F16H15/38; C21D1/06; C21D1/70; C21D9/28
Attorney, Agent or Firm:
Mitsuo Kuribayashi
Nobuhiro Nitta
Kuribayashi Kazuki
Atsushi Miura
Nobuhiro Nitta
Kuribayashi Kazuki
Atsushi Miura
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