Patent ID: 6527642
Filing Date: 2003-03-04
Classification: B62D,F16C,F16D,F16H

Abstract:
A power transmission apparatus for transmitting an electric power from an electric motor, comprising:a motor shaft disposed at the electric motor; a worm shaft on which a worm is disposed; a power transmission coupling comprising a power transmission member which connects the motor shaft and the worm shaft to each other in a power transmittable manner; a driven shaft on which disposed is a worm wheel engaged with the worm; a mechanism for adjusting backlash between the worm wheel and the worm in association with the worm shaft; and first and second sliding pairs which respectively connect first and second ends of the power transmission member to respective ends of the motor shaft and the worm shaft, the rotation of the motor shaft being transmitted to the driven shaft through the power transmission coupling, the worm shaft, the worm and the worm wheel, the first and second sliding pairs being different in sliding direction from each other, the first and second sliding pairs allowing the end of the worm shaft to be radially displaced at the time of the backlash adjustment.