Ntn Corporation

Kimihito Ushida

Koji Sato

Takahide Saito

Tatsunori Shimizu

Masao Kurita

An electric actuator includes a case, an electric motorbuilt in the case, and a motion conversion mechanismconfigured to convert a rotary motion of the electric motorinto a linear motion. The electric motoris fixed to the case (gear case) at a first end in an axial direction of the electric motor, and the electric actuator is provided with a first elastic memberbetween an outer peripheral surface of the electric motorand an inner peripheral surface of the case (motor case) at a second end of the electric motor opposite to the first end fixed to the case (gear case).

Electric actuator including a holder that holds a conductive member and an elastic member that is interposed and held between the holder and a case

An automatic clutch device includes an axial force generating mechanism formed by an electric motor adjacent to the outer periphery of an end of an input shaft of a transmission, and a rotation-linear motion conversion mechanism for converting the rotation of the rotor of the electric motor to a linear motion of a release bearing. The rotation-linear motion conversion mechanism includes plural tubes having different diameters and slidably fitted one in another to form a telescopic tube assembly on the input shaft; and cam mechanisms each disposed between a respective opposed pair of the tubes for converting the rotation of the larger-diameter one of the pair of tubes to a linear motion of the smaller-diameter one of the pair.

Automatic clutch device

A ball screw is provided which makes it easy to determine the degree of deterioration of lubricating grease so that new lubricating grease can be supplied efficiently without loss. The ball screw includes a threaded shaft formed with a thread groove in its outer peripheral surface, a nut formed with a thread groove in its inner peripheral surface, and a plurality of balls rollably retained in a circulating passage comprising a helical passage formed between these thread grooves when the nut is fitted on the threaded shaft, and a passage connecting both ends of the helical passage. The balls and the circulating passage are lubricated by a lubricating grease which has a brightness of 1 or over and in which a base oil having a viscosity at 100&deg; C. of 3.0-7.5 mm /s is thickened by a urea-family thickener.

Growing community of inventors

Shizuoka, Japan

Kimihito Ushida