Otics Corporation

Eiichi Nozaki

Naoyuki Yamane

Naoki Hiramatsu

Masahide Sakurai

Hideki Oka

Tatsuya Sasaki

Haruyasu Tanaka

Yoshiaki Haga

Kenkichi Kuwahara

Satoshi Suzuki

Makoto Takaragi

A bearing device includes a support having a bearing hole, a shaft member slidably inserted into the bearing hole thereby to be rotatably supported by the support, the shaft member having an axial end surface and a locking part located on the axial end surface of the shaft member to protrude in an axial direction of the shaft member from an outer periphery of the axial end surface of the shaft member. The locking part is deformed by force applied to its axial protruding end so as to bulge outward in a radial direction intersecting the axial direction, so that the bulging part is capable of being locked to a peripheral part of the bearing hole on an outer surface of the support.

Bearing device and method of manufacturing the same

Providing a rocker arm which can ensure the durability while reducing the inertial mass. The rocker arm () includes a valve abutment part () pressing a valve (). The valve abutment part () includes a receiving wall () abutting against an end surface of a stem end (A) of the valve () in a pressing state and a pair of sidewalls () protruding from both side ends (A) of the receiving wall () so as to be opposed to each other and disposed along and in proximity to a side peripheral surface of the stem end (A) of the valve (). At least protruding distal ends of the sidewalls () each have a smaller thickness than adjacent portions and serve as a thinner portion ().

Rocker arm and method of manufacturing the rocker arm

A rocker arm includes a pair of side wall portions formed so as to face each other, an engaging portion connecting the pair of side wall portions and adapted to engage with a rocking support member arranged in an engine, and a sliding portion connecting the pair of side wall portions and being adapted to be in slidable contact with a stem front end portion of an engine valve. The engaging portion includes a board surface portion connecting the pair of side wall portions and a protruding portion protruding from the board surface portion toward the rocking support member. In the protruding portion, a spherical concave portion adapted to engage with a spherical protruding portion of the rocking support member is formed as a depression.

Rocker arm

The present invention provides a method of manufacturing a rocker arm, having a process of rough processing, in which a metallic stock is subjected to compression-forming by cold forging to form a connecting portion, side wall lower portions of two side wall portions, and two projecting portions projecting beyond a rocker arm width outwardly from the side wall lower portions, and to form, at tip ends of the side wall lower portions, two stem guides projecting downwardly lower than a pat surface level of the connecting portion, a process of formation of a side wall, in which at least a part of the two projecting portions is subjected to ironing processing to form side wall upper portions of the two side wall portions, thereby forming the two side wall portions accommodated in a rocker arm width, and a process of working of a stem guide, in which the two side wall portions are subjected to ironing processing from outer surface sides, thereby increasing a projection height from which the stem guides project downwardly.

Method of manufacturing rocker arm

Growing community of inventors

Nishio, Japan

Eiichi Nozaki