Patent ID: 7220198
Filing Date: 2007-05-22
Classification: B23Q,F16H,Y10T

Abstract:
1. An electric actuator comprising a driving force-transmitting belt for transmitting rotary driving force of a rotary driving source to a slider, and a tension-adjusting mechanism for adjusting tension of said driving force-transmitting belt, said tension-adjusting mechanism comprising: a first member to which one end of said driving force-transmitting belt is connected; a second member to which another end of said driving force-transmitting belt is connected and which is provided displaceably in an axial direction with respect to said first member; an adjusting member which adjusts a distance between said first member and said second member, wherein said adjusting member comprises an adjusting screw which is screwed with said first member; and an elastic member which is provided between said adjusting member and said first member, said elastic member fitted over said adjusting screw and providing a biasing force acting in a direction to urge a head portion of said adjusting screw away from said first member, wherein said first member is fixed on said slider, and an axis of said adjusting member is disposed within a cross section of said driving force-transmitting belt perpendicular to said axis.