Ntn Corporation

Tsuyoshi Ueno

Tatsuro Sugiyama

Masafumi Osugi

Shintaro Suzuki

Hiromi Nagai

Masazumi Kobayashi

Shinichi Takabe

Yoshikazu Fukumura

Mika Kohara

Takaaki Shibata

Masahide Miyata

Morihiro Wada

Mikio Tomiyama

Chikaya Shinba

Atsuto Takemura

Shintaro Harada

Sugiyama Tatsuro

Tomonari Oosumi

Provided is a method of manufacturing an outer joint member of a constant velocity universal joint, which is constructed by forming a cup section having track grooves, and a shaft section, and by welding a cup member and a shaft member, the method including: forming the cup member and the shaft member of medium carbon steel; preparing a cup member having a cylindrical portion and a bottom portion integrally formed by forging, and a joining end surface in a machining step; preparing a shaft member having a joining end surface formed in a machining step; bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other; welding the cup member and the shaft member by radiating a beam; and performing, after the welding, an ultrasonic flaw detection-inspection step.

Outer joint member of constant velocity universal joint

Method of manufacturing outer joint member of constant velocity universal joint, outer joint member, shaft member and cup member

A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members of medium carbon steel, forging the cup member to have integrally formed cylindrical and bottom portions, and machining a joining end surface on an outer surface of the bottom portion after the forging. The method also includes preparing the shaft member to have a joining end surface to be joined to the bottom portion of the cup member, which is formed by machining, bringing the joining end surfaces of the cup and shaft members into abutment against each other and welding the cup and shaft members by radiating a beam from an outer side of the cup member to an abutment portion between the cup and shaft members in a radial direction of the cup member.

Method of manufacturing outer joint member of constant velocity universal joint, and outer joint member

There is provided a constant velocity universal joint having excellent durability at high temperature while using a boot made of silicone rubber that does not include cerium oxide or other rare earth element-containing compound. The constant velocity universal joint is provided with an outer joint member (), an inner joint member (), a shaft () coupled to the inner joint member (), and a boot () mounted directly or via another member to the outer joint member () and the shaft (), the boot () being a molded article of a silicone rubber composition including silicone rubber, iron oxide, and titanium oxide and not including a rare earth element-containing compound. The silicone rubber composition furthermore includes barium zirconate as required.

Constant velocity universal joint

A constant velocity joint structure including an inner joint member, a retaining ring, and a shaft which are configured to prevent the shaft from being withdrawn from the inner joint member when a pulling force is applied to one side of the shaft is disclosed. A retaining ring groove is disposed at an opposite side of the shaft. In a preferred embodiment, the retaining groove has at least two points which contact an inner surface of the retaining ring when the pulling force is applied to prevent the retaining ring from contracting in a radial direction, thereby preventing the shaft from being withdrawn from the inner joint member.

Structure for preventing shaft of constant velocity joint from coming off

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Shizuoka, Japan

Tsuyoshi Ueno