ELECTRIC ACTUATOR

• Main Authors: KURITA MASAO, SAITO TAKAHIDE, MIKURIYA ISAO
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2019
• Subjects: BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide an electric actuator capable of preventing biting from being caused between a screw shaft and a nut by the collision of a rotation restricting member provided on the screw shaft with the end face of the nut.SOLUTION: The electric actuator includes a motor part, and a motion conversion mechanism for converting the rotating motion of the motor part into linear motion, the motion conversion mechanism having a nut 17 rotatably supported, and a screw shaft 18 to be moved in the axial direction along with the rotation of the nut 17, the screw shaft 18 being provided with a rotation restricting member 21 protruded in the outer diameter direction for restricting the rotation around the axis. Between the rotation restricting member 21 and an end face 17a of the nut 17, an elastic member 27 is provided.SELECTED DRAWING: Figure 3 【課題】ねじ軸に設けられた回転規制部材がナットの端面に衝突することにより発生するねじ軸とナットとの間での噛み込みを防止できる電動アクチュエータを提供する。【解決手段】モータ部と、モータ部の回転運動を直線運動に変換する運動変換機構とを備える電動アクチュエータにおいて、運動変換機構は、回転可能に支持されたナット１７と、ナット１７の回転に伴って軸方向に移動するねじ軸１８とを有し、ねじ軸１８には、その軸心周りの回転を規制する回転規制部材２１が外径方向に突出するように設けられ、回転規制部材２１とナット１７の端面１７ａとの間に、弾性部材２７を設けた。【選択図】図３