Multifunctional width adjustable conveying device

The invention discloses a multifunctional width adjustable conveying device of a PCB (printed circuit board) and machined component washing device, which is a core part of the washing device. The multifunctional width adjustable conveying device consists of a power input device (1), a supporting width adjusting device (2) and a conveying guide rail compression device (3), wherein a motor (1-1) drives a gear of a conveying guide rail (3-1) to rotate through a transmission shaft (1-4), a gear (1-9) and a gear (1-14), and a chain of the conveying guide rail (3-1) drives a large roller and a small roller to rotate together so as to realize the online washing of a PCB; a groove body of the conveying guide rail (3-1) is connected with a slide bearing sleeve and a nut seat of the supporting width adjusting device (2-1), a handle of a ball screw width adjusting device (2-2) is rotated so as to drive a ball screw to rotate through a chain wheel and the chain, the conveying guide rail (3-1) is driven by the linear motion of the nut seat to make linear movement along the axis direction so as to realize the width adjustment of the conveying guide rail, and the online washing of PCBs in different widths can be satisfied.