Topy Kogyo Kabushiki Kaisha

Ichiro Takeuchi

Satoru Miyashita

Kentaro Oba

Kenji Yoshii

Ryoichi Watanabe

Mitsuru Itoh

A multi-piece rim includes a rim base including a first flange and a gutter band, a bead seat band including a second flange, a lock ring, and a first side ring located on a side of the first flange and a second side ring located on a side of the second flange. A circumferentially extending surface of the first flange and a tapered surface of a circumferentially extending inner surface of the first side ring and/or a circumferentially extending surface of the second flange and a tapered surface of a circumferentially extending inner surface of the second side ring are inclined radially outwardly in an axially outboard direction of the multi-piece rim, so that circumferential and radial slippage between rim members is prevented to suppress a fretting fatigue.

Multi-piece rim

A multi-piece rim type disk wheel includes a multi-piece rim and a disk. The multi-piece rim includes a rim base, a bead seat band, a lock ring and a flange. The disk includes an outside portion constituting a part of the rim base, and a hub coupling portion extending radially inwardly from the outside portion and has a substantially T-shaped cross-section. A method of producing the multi-piece rim type disk wheel includes the steps of: manufacturing a gutter band, a first center band, a disk having a substantially T-shaped cross-section, a second center band and a back flange separately from each other; and connecting them to each other by a full penetration butt weld to form into the integral rim base.

Multi-piece rim type disk wheel and a method for producing the same

A multi-piece rim includes a lock ring and a gutter band having a lock ring groove. The lock ring groove includes a bottom surface, axially inboard and outboard curved surfaces connected to opposite ends of the bottom surface, and axially inboard and outboard side surfaces connected to the axially inboard and outboard curved surfaces. A lock ring escaping groove is formed at a transition point from the axially outboard curved surface to the axially outboard side surface and a surface portion adjacent to the transition point. The lock ring escaping groove is recessed in a direction away from the lock ring.

Growing community of inventors

Ayase, Japan

Ichiro Takeuchi