LINEAR DRIVE ACTUATOR

PROBLEM TO BE SOLVED: To provide a linear drive actuator capable of downsizing a device body by reducing a number of components and simplifying an inner structure.SOLUTION: A clutch actuator 100 (a linear drive actuator) is equipped with: a trochoid speed reducer 40 which includes a DC motor 10 including a drive shaft 14, a driving-side gear 41 in which driving force of the DC motor 10 is inputted, and which is rotated while being eccentric to a rotational axis A of the drive shaft 14 of the DC motor 10, and a driven side gear 42 engaged with the driving-side gear 41 while having a different number of teeth from a number of teeth of the driving-side gear 41 and disposing a rotational axis B on the rotational axis A of the DC motor 10, and reduces the number of rotations of the DC motor 10; and a feeding screw mechanism portion 50 which includes a screw shaft member 52 in which a moving axis C is disposed on the rotational axis A of a driven side gear 42 of the trochoid speed reducer 40, and is configured to convert backward/forward rotations of the driven side gear 42 into reciprocating liner motion along the moving axis C of the screw shaft member 52.SELECTED DRAWING: Figure 1 【課題】部品点数の削減とともに内部構造を簡素化させることによって、装置本体を小型化することが可能な直線駆動アクチュエータを提供する。【解決手段】このクラッチアクチュエータ１００（直線駆動アクチュエータ）は、駆動軸１４を含むＤＣモータ１０と、ＤＣモータ１０の駆動力が入力されるとともにＤＣモータ１０の駆動軸１４の回転軸線Ａに対して偏心した状態で回転される原動側ギア４１と、原動側ギア４１が有する歯数と異なる歯数を有して原動側ギア４１に噛み合わされ、回転軸線ＢがＤＣモータ１０の回転軸線Ａ上に配置された従動側ギア４２とを含み、ＤＣモータ１０の回転数を減速させるトロコイド減速機４０と、移動軸線Ｃがトロコイド減速機４０の従動側ギア４２の回転軸線Ａ上に配置されたねじ軸部材５２を含み、従動側ギア４２の正逆回転をねじ軸部材５２の移動軸線Ｃに沿った往復直線移動に変換可能に構成された送りねじ機構部５０とを備える。【選択図】図１