Cam device

A cam device comprising:

• a screw-shaped cam configured to serve as an input shaft;
• an output shaft provided with a roller follower at an outer peripheral surface of the output shaft and arranged so as to perpendicularly intersect the input shaft;
• and
• a bearing configured to rotatably secure the output shaft to a housing,
• wherein rotation of the input shaft is converted into rotation of the output shaft via the roller follower,
• the bearing includes one radial bearing part configured to receive a pressure in a radial direction of the output shaft and two axial bearing parts configured to receive opposing pressures in an axial direction of the output shaft,
• each of the one radial bearing part and the two axial bearing parts is configured of a plurality of rolling elements and a retainer,
• a ring of the rolling elements of the radial bearing part is in direct contact with the outer peripheral surface of the output shaft, this contact surface serves as an output-shaft side raceway surface of the radial bearing part,
• a ring of the rolling elements of one of the two axial bearing parts is in direct contact with the outer peripheral surface of the output shaft, a ring of the rolling elements of the other one of the axial bearing parts is in direct contact with the outer peripheral surface of the output shaft or a first surface of a first ring-shaped part secured to the output shaft, and contact surfaces of the rolling elements of the axial bearing parts form output-shaft side raceway surfaces of the axial bearing parts,
• the rings of the rolling elements of the radial bearing part and the rolling elements of one of the two axial bearing parts are in contact with a second surface of a second ring-shaped part disposed about the output shaft to form an outer raceway surface of the radial bearing part and an outer raceway surface of the axial bearing part respectively, the rings of the rolling elements of the radial bearing part and the rings of the rolling elements of one of the two axial bearing parts are secured to the housing or are directly with an inner surface of the housing, and the rings of the rolling elements of the other one of the axial bearing parts are in contact with the second ring-shaped part and form another outer raceway surface of the axial bearing part, and
• the bearing is rotatably supported at the housing by the output-shaft side raceway surface of the radial bearing part and the output-shaft side raceway surfaces of the axial bearing parts.