Patent ID: 8973453
Filing Date: 2015-03-10
Classification: F16H,Y10T

Abstract:
1. A feed screw mechanism for use in an actuator having a slider which is displaceable along an axial direction of a body, comprising: a feed screw shaft engraved with screw threads on an outer circumference thereof; a displaceable body screw-engaged with the screw threads and disposed on an outer circumferential side of the feed screw shaft to be displaced along the feed screw shaft by rotation of the feed screw shaft; and a support mechanism that includes a single pin inserted in a second pin hole in the displaceable body, the pin is press-inserted and fitted into a first pin hole in the slider, and the pin prevents rotation of the displaceable body with the feed screw shaft, wherein the pin transmits a driving force from the feed screw shaft to the slider to displace the slider along the feed screw shaft with the displaceable body, wherein the pin of the support mechanism is displaceably positioned in the second pin hole in the displaceable body to act as a fulcrum such that the displaceable body is displaceable in three directions relative to the slider, wherein an axis of the pin extends from an end of the pin inserted in the second pin hole toward a center of the feed screw shaft, wherein the end of the pin is in contact with the second pin hole in at least two places on radially opposite sides of the spherical shape, and wherein the end of the pin is in contact with the second pin hole in a third place on an end-most point of the spherical shape in an axial direction of the pin.