ELECTRIC ACTUATOR

• Main Authors: SATO KOJI, HIRANO SHINSUKE
• Format: Patent
• Language: English; Japanese
• Published: 29.03.2023
• 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 facilitate attachment work of a buffer member to a screw shaft.SOLUTION: In an electric actuator 1, a screw shaft 31 forming a ball screw 30 serving as a motion conversion mechanism is provided with: a recessed part 31c which is open on the other end surface 31b; and a pin insertion hole 31d which penetrates through the screw shaft 31 in a radial direction in an axial range of the recessed part 31c. A fitting protruding part 73b of a buffer member 73 formed of an elastic material is fitted in the recessed part 31c. The fitting protruding part 73b has a pair of claw parts 73c which are disposed spaced apart from each other in the radial direction. The pair of claw parts 73c sandwiches a pin 71 inserted into the pin insertion hole 31d.SELECTED DRAWING: Figure 3 【課題】ねじ軸に対する緩衝部材の取り付け作業を容易化する。【解決手段】運動変換機構としてのボールねじ３０を構成するねじ軸３１に、その他端面３１ｂに開口した凹部３１ｃと、凹部３１ｃの軸方向範囲内でねじ軸３１を径方向に貫通するピン挿入孔３１ｄとが設けられ、上記凹部３１ｃに、弾性材料で形成された緩衝部材７３の嵌合凸部７３ｂが嵌合された電動アクチュエータ１において、嵌合凸部７３ｂが、径方向に間隔を空けて対向配置された一対の爪部７３ｃを有し、この一対の爪部７３ｃでピン挿入孔３１ｄに挿入されたピン７１を挟持する。【選択図】図３