Sliding spline shaft device

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United States of America Patent

PATENT NO 11927225
APP PUB NO 20210199158A1
SERIAL NO

17056471

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A sliding spline shaft device of the present invention includes a male spline and a female spline that is fitted to the male spline in an axially slidable manner, and at least one of the splines has a surface processed layer. The surface processed layer includes an undercoat layer, an intermediate layer containing phosphate, and a topcoat layer containing solid lubricant, in this order. The undercoat layer contains iron nitride and/or iron carbide. Thus, the surface of a base material has high hardness. As a result, microscopic deformation of the sliding surface is reduced, and increase in a real contact area is suppressed, whereby stick-slip is prevented.

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Patent Owner(s)

Patent OwnerAddress
NISSAN MOTOR CO LTDKANAGAWA KANAGAWA
NIHON PARKERIZING CO LTD15-1 NIHONBASHI 1-CHOME CHUO-KU TOKYO 1030027 ?1030027

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hiraiwa, Shunsuke Kanagawa, JP 2 1
Ito, Masato Kanagawa, JP 148 1964
Iwasa, Aiki Kanagawa, JP 1 0
Kashiwabara, Shigetoshi Kanagawa, JP 2 6
Katada, Kunio Kanagawa, JP 5 108
Katsumada, Yasuyuki Kanagawa, JP 1 0
Kawaguchi, Akihumi Kanagawa, JP 1 0
Kodama, Tokunori Kanagawa, JP 2 3
Nakajima, Makoto Kanagawa, JP 146 704
Nishijima, Takeo Kanagawa, JP 14 181
Suzuki, Shinichi Kanagawa, JP 286 3549

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