PROBLEM TO BE SOLVED: To enable a variation in rotating state of a planetary roller revolved while being rotated through a frictional contact with a rotating shaft to be restricted.SOLUTION: A planetary roller 49 is assembled between a rotating shaft 35 rotationally driven by an electric motor and an outer ring member 21, revolved while being rotated through contact with the rotating shaft 35 and the outer ring member 21 is moved in an axial direction through engagement with a peripheral groove 54 formed at an outer circumference of the planetary roller 49. A shaft end part of a roller shaft 47 rotatably supporting the planetary roller 49 is movably supported in a radial direction by the discs 41a, 41b of a carrier 40, it is biased in a radial inner direction with an elastic ring 50 bridged over to wind in the shaft end part of the roller shaft 47 and the planetary roller 49 is press contacted with an outer diameter surface of the rotating shaft 35. The elastic ring 50 is applied as a ring spring that is rotatable through contact with the roller shaft 47. Both ends of the ring spring 50 are provided with an extending-out part facing outward in a tangential direction or radial direction so as to prevent rotation of the ring spring 50 from being inhibited.SELECTED DRAWING: Figure 2
【課題】回転軸との摩擦接触によって自転しつつ公転する遊星ローラの回転状況の変化を抑制できるようにする。【解決手段】電動モータによって回転駆動される回転軸35と外輪部材21間に遊星ローラ49を組込み、回転軸35との接触により自転させつつ公転させ、遊星ローラ49の外周に形成された円周溝54の噛合により外輪部材21を軸方向に移動させる。遊星ローラ49を回転自在に支持するローラ軸47の軸端部をキャリア40のディスク41a、41bで径方向に移動自在に支持し、そのローラ軸47の軸端部を巻き込むように掛け渡された弾性リング50で径方向内方に向けて付勢して、遊星ローラ49を回転軸35の外径面に圧接させる。弾性リング50をリングばねとしてローラ軸47との接触により回転自在とし、そのリングばね50の両端部に接線方向または径方向外方に向く延出部を設けて、リングばね50の回転が阻害されないようにする。【選択図】図2
ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE DEVICE
電動式直動アクチュエータおよび電動式ブレーキ装置
2017-01-05
Patent
Electronic Resource
Japanese
ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE DEVICE
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