ELECTRIC ACTUATOR

• Main Authors: NAITO YUKI, IKEDA YOSHINORI, MATTO TAKUSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: BEARINGS; BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To achieve an electric actuator that can operate individually a plurality of objects to be operated and has excellent assemblability.SOLUTION: An electric actuator 1 comprises an enclosure 2 storing and holding motor portions A and motion conversion mechanism portions B. The motion conversion mechanism portions B have screw shafts 33 arranged coaxially with rotation centers of rotors 24, and nut members 32 fitted rotatably to the outer peripheries of the shafts. Operating portions D mounted on the screw shafts 33 operate an object to be operated in a shaft direction by linear motion in the shaft direction of the screw shafts 33 accompanying rotation of the nut members 32. Terminal portions D (terminal main bodies 50) holding electric components have tubular portions 50A held from both sides in the shaft direction by members constituting the enclosure 2, and in the tubular portions 50A are provided opening portions 50c which are penetrated through the inside and outside of the enclosure 2. The screw shafts 33 are formed in a hollow shape having through-holes 33c extending in the shaft direction.SELECTED DRAWING: Figure 1 【課題】複数の操作対象を個別に操作可能で、かつ組立性が良好な電動アクチュエータを実現する。【解決手段】モータ部Ａおよび運動変換機構部Ｂを収容・保持した筐体２を備え、運動変換機構部Ｂが、ロータ２４の回転中心と同軸に配置されたねじ軸３３、およびその外周に回転可能に嵌合されたナット部材３２を有し、ナット部材３２の回転に伴ってねじ軸３３が軸方向に直線運動することにより、ねじ軸３３に取り付けられた操作部Ｄが操作対象を軸方向に操作する電動アクチュエータ１であって、電装部品を保持したターミナル部Ｄ（ターミナル本体５０）が、筐体２の構成部材により軸方向両側から挟持された筒状部５０Ａを有すると共に、筒状部５０Ａに筐体２の内外を連通させる開口部５０ｃが設けられ、ねじ軸３３が、軸方向に延びた貫通穴３３ｃを有する中空状に形成されている。【選択図】図１