Unisia Jecs Corporation

Hitachi, Ltd.

Masao Sakamoto

Mitsumasa Iijima

Tadanori Baba

Shinichi Kondo

Toshiyuki Masuda

Masao Kishi

A shock-absorbing mechanism for a power-transmission device includes a cylindrical driven-side shaft coupled to the driving-side shaft through a constant-velocity joint to be axially relatively slidable with respect to the driving-side shaft, a center bearing for rotatably supporting the driving-side shaft to the vehicle body, and a labyrinth mechanism for sealing the inside of the center bearing. An end of the driven-side shaft on the side of the driving-side shaft is disposed axially opposite to the labyrinth mechanism. When the two shafts are slid in the direction to approach each other by an axial load input thereto, the end of the driven-side shaft collides axially with the labyrinth mechanism.

Shock-absorbing mechanism for power-transmission device

An outer joint part includes a cup-shaped body portion having a rotation axis. The cup-shaped body portion has an inner circumferential surface having a plurality of circumferentially spaced inner grooves, and an outer circumferential surface having a plurality of outer grooves circumferentially alternately disposed relative to the inner grooves. The wall thickness of the cup-shaped body portion at the outer grooves is smaller than the wall thickness of the cup-shaped body portion in the areas between the outer grooves. A preform formed into the outer joint part includes a bowl-shaped preform portion having a center axis and inner and outer circumferential surfaces similar in shape to each other. The inner circumferential surface defines inner recesses circumferentially spaced from each other. The outer circumferential surface defines outer recesses circumferentially alternately disposed relative to the inner recesses.

Outer joint part of a constant velocity ball joint

An apparatus for forming a cup-shaped cage, including a cup-shaped workpiece, an outer die having a center axis and a cavity about the center axis, an inner die coaxially disposed within the cavity of the outer die, and a mandrel adapted to move axially and radially the inner die relative to the outer die. The outer and inner dies have first and second control surfaces which are engaged with outer and inner surfaces of the workpiece, respectively, when the outer and inner dies are in the cooperative press position. The outer die includes a part allowed to be out of contact with the outer surface of the workpiece to permit the movement of the inner die relative to the outer die into the cooperative press position.

Apparatus for forming a cup-shaped cage

A universal joint constituted by a first joint, a second joint and a rolling element. The first joint is formed by friction-welding an outer race member and a connecting shaft member. The connecting shaft member has a ring-shaped connecting portion which is welded with a bottom portion of the outer race member. The connecting portion is formed to project from a recess portion of the connecting shaft member toward the outer race member. Therefore, burr generated by the friction welding between the connecting portion and the bottom surface of the outer race member is received in a space defined by the recess portion and the bottom surface of the outer race member. This facilitates removal of the burr.

Growing community of inventors

Kanagawa, Japan

Masao Sakamoto