Nsk Corporation

Other

Takafumi Kuwano

Hiroyuki Sawai

Hiroya Miyazaki

Yoshihisa Ohnuki

Yoshifumi Hirano

Hideo Ouchi

Takashi Imanishi

Nobuaki Mitamura

Nobuo Gotou

A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.

Method for assembling a hub unit for supporting a wheel shaft

A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.

Rolling bearing unit for supporting vehicle wheel

Hub unit for supporting a wheel shaft

A power roller of a power roller bearing in a half-toroidal type continuously variable transmission is manufactured as follows. In step S,, a work used as material is heated up to a temperature suitable for forging. In step S,, the work is pressed by using a first die set, with its end face being held. In step S,, the work is forged by using a second die set. The work is formed into a work having a curved face corresponding to a traction surface, a hole corresponding to a center hole, and a recess corresponding to a raceway groove. In step S,, the work is punched by using a third die set. In step S,, the work is subjected to a cutting process and a heating process, thereby obtaining the power roller.

Power roller bearing of toroidal type continuously variable transmission and method of manufacturing power roller bearing of toroidal type continuously variable transmission

Growing community of inventors

Fujisawa, Japan

Takafumi Kuwano