Width-adjustable base for lower limb rehabilitation robot

The invention discloses a width-adjustable base suitable for installation of a sitting and lying type lower limb rehabilitation robot, and the width-adjustable base is medical treatment rehabilitation auxiliary equipment used for training and treatment of lower limb paralysis/paraplegia patients. The width-adjustable base consists of a left-side base 1, a right-side base 3 and a seat 2, wherein the left-side base 1 and the right-side base 3 are respectively installed on two sides of the seat 2; the right-side base 3 is composed of an upper-layer movable base 4, a lower-layer fixed base 5 and a right transmission mechanism 12, the left-side base 1 is composed of an upper-layer movable base 7, a lower-layer fixed base 6 and a left transmission mechanism 10, the left and right transmission mechanisms 10 and 12 are linked via a universal coupling 11, the universal coupling 11 is linked and fixedly installed at the bottom of the seat 2 through bearing blocks 27 and 28, a right-side lead screw 24 is linked with the universal coupling 11 under the seat 2 through a jaw clutch 26.