To provide an electric actuator which can be compact.SOLUTION: An electric actuator comprises a ball screw device having a screw shaft and a nut, a planetary gear mechanism, a first housing, and a motor. The first housing has an opening, an accommodation part and a cylinder. The motor includes a stator and a rotor which are arranged on an outer peripheral side of the first housing, a cylinder part with which the rotor fits, a rotating board facing the opening of the first housing, and a sun gear shaft extending from the rotating board. The planetary gear mechanism includes a sun gear fixed to the sun gear shaft, a ring gear which fits with the accommodation part, a plurality of planetary gears arranged between the sun gear and the ring gear, and a carrier which is rotatably supported on the accommodation part and rotatably supports the plurality of planetary gears. The screw shaft is fixed to the carrier at an end part in a second direction, and co-rotates together with the carrier. The nut lies inside the cylinder from an inner peripheral side of the accommodation part.SELECTED DRAWING: Figure 1

    【課題】大型化を回避できる電動アクチュエータを提供する。【解決手段】電動アクチュエータは、ねじ軸とナットを有するボールねじ装置と、遊星歯車機構と、第1ハウジングと、モータと、を備え、第1ハウジングは、開口部と、収容部と、シリンダと、を有し、モータは、第1ハウジングの外周側に配置されるステータ及びロータと、ロータが嵌合する円筒部と、第1ハウジングの開口部と対向する回転盤と、回転盤から延びるサンギヤ用軸と、を有し、遊星歯車機構は、サンギヤ用軸に固定されたサンギヤと、収容部に嵌合するリングギヤと、サンギヤとリングギヤとの間に配置された複数のプラネタリギヤと、収容部に回転自在に支持され、かつ複数のプラネタリギヤを回転自在に支持するキャリアと、を有し、ねじ軸は、第2方向の端部がキャリアに固定され、キャリアと供回りし、ナットは、収容部の内周側からシリンダの内部に入り込んでいる。【選択図】図1


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    Title :

    ELECTRIC ACTUATOR


    Additional title:

    電動アクチュエータ


    Contributors:
    SEGAWA RYO (author)

    Publication date :

    2022-12-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16H Getriebe , GEARING / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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