PROBLEM TO BE SOLVED: To provide a linear motion actuator capable of improving quietness and durability, and reducing an axial load input to a bearing supporting a nut.SOLUTION: A linear motion actuator inputs rotation driving force from an electric motor 4 to a nut 52 of a ball screw mechanism 5 through a power transmission gear mechanism 6, and linearly moves with a screw shaft 51 of the ball screw mechanism 5 as a thrust transmission shaft. In the power transmission gear mechanism 6, helical gear is used, and the torsional direction of the helical gear is assembled into a direction of attenuating reaction force input to the screw shaft 51 of the ball screw mechanism 5.SELECTED DRAWING: Figure 1
【課題】静粛性・耐久性を向上させるとともに、ナットを支持する軸受に入力されるアキシャル荷重を低減することができる直動アクチュエータを提供する。【解決手段】電動モータ4からの回転駆動力を動力伝達ギヤ機構6を介してボールねじ機構5のナット52に入力し、ボールねじ機構5のねじ軸51を推力伝達軸として直動させる直動アクチュエータであって、動力伝達ギヤ機構6に、はすば歯車を用い、該はすば歯車のねじれ方向が、ボールねじ機構5のねじ軸51に入力される反力を減衰する方向に組み込まれている。【選択図】図1
LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE BOOSTER INCLUDING THE SAME
直動アクチュエータおよびこれを備える電動ブレーキブースタ装置
2016-06-20
Patent
Electronic Resource
Japanese
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