Small gantry ball screw supporting mechanism

A small gantry ball screw supporting mechanism relates to the technical field of supporting devices and comprises a plurality of brackets arranged below a lead screw side by side in the axial direction of the lead screw, two supporting rollers are rotatably mounted on each bracket side by side, the axes of the supporting rollers are parallel to the axis of the lead screw, and an area is supported through an area between the two supporting rollers. The bracket is slidably mounted on the mounting base in the vertical direction through an avoiding assembly, supporting rods are further vertically and fixedly connected to the two ends of the bracket correspondingly, a sliding rod is fixedly connected between the two supporting rods, and guide-in rods are fixedly connected to the outer walls, away from each other, of the two supporting rods downwards correspondingly. The device solves the problems that in the prior art, a device supports a lead screw through a fixedly-arranged supporting base, but due to the arrang