To provide an electric linear motion actuator and an electric brake device in which a planetary roller stably auto-rotates and revolves.SOLUTION: A linear motion conversion mechanism is a planetary roller screw mechanism which includes: a rotary member including a sun roller to which rotation of an electric motor is input, a plurality of planetary rollers which is brought into rolling contact with an outer periphery of the sun roller, and a carrier for holding the plurality of planetary rollers in an auto-rotatable and revolvable manner; a linear motion member including an outer ring arranged so as to surround the plurality of planetary rollers; and circumferential engagement portions respectively formed on an outer peripheral surface of the planetary roller and an inner peripheral surface of the outer ring. By engagement of the circumferential engagement portions, rotation of the planetary roller is converted to linear motion in an axial direction of the outer ring, and an inner diameter portion or a groove bottom of the outer ring and the planetary roller or an additional member fixed to the planetary roller are brought into contact with each other at a position different from the circumferential engagement portions.SELECTED DRAWING: Figure 9
【課題】遊星ローラの自転および公転が安定した電動式直動アクチュエータ及び電動ブレーキ装置を提供する。【解決手段】直動変換機構が、電動モータの回転が入力されるサンローラと、前記サンローラの外周に転がり接触する複数の遊星ローラと、前記複数の遊星ローラを自転可能かつ公転可能に保持するキャリアとを含む回転部材、前記複数の遊星ローラを囲むように配置されたアウタリングを含む直動部材、および、前記遊星ローラの外周面および前記アウタリングの内周面にそれぞれ形成された周方向係合部、を有し、前記周方向係合部同士の係合によって、前記遊星ローラの回転を前記アウタリングの軸方向の直線運動に変換する遊星ローラねじ機構であり、前記アウタリングの内径部または溝底と、前記遊星ローラまたは前記遊星ローラに固定した追加部材とを、前記周方向係合部とは異なる位置で接触させた。【選択図】図9
ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE DEVICE
電動式直動アクチュエータおよび電動ブレーキ装置
2024-02-15
Patent
Electronic Resource
Japanese
ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE DEVICE
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