REVERSE INPUT BLOCK CLUTCH AND ACTUATOR USING THE SAME

To provide a reverse input block clutch which can release a reverse input block function if necessary, is easy in the manufacturing and assembling of a component, and also easy in weight reduction.SOLUTION: A reverse input block clutch has such a constitution that, at input torque, a cam receiver 2 rotates integrally with an input shaft 1 at a normal time, a spacer 6 which is slidably fit into an eccentric hole 2a of the cam receiver 2, and supported to a swirl support mechanism 8 revolves and swirls without being rotated, and an eccentric cam 4 which is slidably fit to an internal periphery of the spacer 6 thereby rotates integrally with an output shaft 3, and at reverse input torque, a moving force is generated at the spacer 6, and the output shaft 3 does not rotate since a revolution swirl motion of the spacer 6 is hindered; however, at an emergency, the cam receiver 2 and the output shaft 3 are connected by fastening a screw 12 which is screwed into the cam receiver 2, and push-pressing the screw to a flange part 3a of the output shaft 3, and the output shaft 3 and the input shaft 1 can be integrally rotated by adding the reverse input torque.SELECTED DRAWING: Figure 1 【課題】必要に応じて逆入力遮断機能を解除でき、かつ部品の製作および組立が行いやすく、軽量化も容易な逆入力遮断クラッチを提供する。【解決手段】通常時は、入力トルクに対して、入力軸１と一体にカム受け２が回転し、カム受け２の偏心穴２ａに摺動可能に嵌め込まれて旋回支持機構８に支持されたスペーサ６が自転することなく公転旋回することにより、スペーサ６内周に摺動可能に嵌め込まれた偏心カム４が出力軸３と一体に回転し、逆入力トルクに対しては、スペーサ６に移動力が生じてスペーサ６の公転旋回運動が妨げられることにより出力軸３が回転しなくなるが、非常時には、カム受け２にねじ込まれたねじ１２を締め込んで出力軸３のフランジ部３ａに押し付けることにより、カム受け２と出力軸３とを連結し、逆入力トルクを加えて出力軸３を入力軸１と一体に回転させることができる構成の逆入力遮断クラッチとした。【選択図】図１