Minebea Kabushiki-kaisha

Katashi Tatsuno

Rikuro Obara

A compound ball bearing comprises a bearing assembly including a spindle 1, a sleeve 2 surrounding the spindle 1, and an inner ring 6 fitted on the spindle or an outer ring fitted in the sleeve, and balls 5, 9 provided between the spindle 1 and the sleeve 2, between the spindle and outer ring or between the inner ring 6 and sleeve 2. A base 16 of a motor is formed as a one-piece unit with the spindle. The vibration accuracy of the spindle 1 can be improved.

Compound ball bearing

A compound ball bearing type pulley comprises a bearing assembly including a spindle 1, a sleeve 2 surrounding the spindle 1 with outer flanges 22a, 22b formed on upper and lower ends of the sleeve and an inner ring fitted on the spindle. Balls 5, 9 are provided and between the spindle 1 and sleeve 2, between the inner ring 6 and sleeve 2. Conventional outer rings are not necessary and the outer diameter of the pulley can be made smaller.

Compound ball bearing type pulley

A compound ball bearing comprises a bearing body including a spindle 1, a sleeve 2 surrounding the spindle 1, and an inner ring fitted on the spindle or an outer ring fitted in the sleeve, and balls 5, 9 provided between the spindle 1 and sleeve 2, between the spindle and outer ring or between the inner ring 6 and sleeve 2. A motor component such as a hub 11 for the rotor, a flange for the motor base or a yoke yolder is molded as a one-piece molding with the sleeve, spindle or inner ring. The inner or outer ring can be secured in a proper position by facilitating its pre-loading, and the vibration accuracy of the spindle can be improved.

A compound ball bearing for swing arm unit acomprises a bearing assembly including a spindle 1, a sleeve 2 surrounding the spindle 1, an inner ring fitted on the spindle, with balls 5 and 9 being provided between the spindle 1 and sleeve 2, between the inner ring 6 and sleeve 2. A swing arm 22 is mounted on the sleeve 2. Conventional outer rings are not necessary and the outer diameter of the sleeve can be made smaller than conventional devices.

Compound ball bearing for swing arm unit and swing arm unit for hard

A compound ball bearing comprises a bearing assembly including a spindle 1, a sleeve 2 surrounding the spindle 1, and an inner ring 6 fitted on the spindle or an outer ring fitted in the sleeve, and balls 5, 9 provided between the spindle 1 and sleeve 2, between the spindle and outer ring or between the inner ring 6 and sleeve 2. A hub 11 serving as the rotor of a motor is formed as a one-piece unit with the spindle. The vibration accuracy of the spindle 1 can be improved.

A double-row ball bearing comprises an axle (1) and a sleeve (2). In such ball bearing: a pre-load is axially applied to one of a short straight tube type inner ring (6) which is mounted on the axle (1) and a short straight tube type outer ring (10) which is mounted in a sleeve (2); and the inner ring (6) is fixed to the axle (1) or the outer ring (10) is fixed to the sleeve (2), in a condition in which the pre-load is applied.

Growing community of inventors

Nagano-ken, Japan

Katashi Tatsuno