Jtekt Corporation

Atsuhiro Yoshida

Wataru Yamada

Jun Hamakita

Ryuji Nakata

Osamu Honda

Nobuaki Shibata

Yuji Wakugawa

Naoji Kawasoko

Hideyuki Honkado

In a coupling structure for coupling a shaft to a universal joint yoke, an insertion portion of a shaft is passed through an insertion hole of a universal joint yoke. An outward protrusion of a distal end portion of the shaft faces a peripheral edge of a first opening of the insertion hole across a gap in an axial direction. A fixed portion that adjoins the insertion portion is fixed to a peripheral edge of a second opening of the insertion hole by welding. An engaging portion formed on an outer periphery of the insertion portion and an engaged portion formed in an inner periphery of the universal joint yoke, which defines the insertion hole, are engageable with each other in a rotational direction with a rotation permitting gap for phase adjustment.

Coupling structure for coupling shaft to universal joint yoke, coupling method for coupling shaft to universal joint yoke, and intermediate shaft

A speed reducer for an electric power steering system includes a worm, a worm wheel, and a housing. Only a meshing section where the worm and the worm wheel mesh with each other and a space between the worm wheel and the housing are filled with grease. The grease in the space is in contact with both tooth surfaces of the worm wheel and an inner peripheral face of the housing, the inner peripheral face facing the worm wheel.

Speed reducer and electric power steering system

Growing community of inventors

Nara, Japan

Atsuhiro Yoshida