BUFFER SLIDING RAIL DRIVING FRICTION MUFFLING MECHANISM

The present invention provides a buffer slide rail with a dynamic friction silencing mechanism, comprising an upper rail, a middle rail and a lower rail which are in sliding connection in sequence, wherein a transmission lower bead nest in transmission connection with the middle rail is assembled on the lower rail, and a transmission upper bead nest in transmission connection with the upper rail is assembled on the middle rail, characterized in that a dynamic friction silencing assembly for reducing an axial moving speed is arranged between the connection of the upper rail and the middle rail, the dynamic friction silencing assembly including an abrasion-resistant connecting block and a rolling connecting block, wherein the rolling connecting block comes into contact with the abrasion-resistant connecting block as the upper rail axially moves and is in rolling connection with the abrasion-resistant connecting block. The structure is simple, to increase a coefficient of dynamic friction between the upper rail and the middle rail, reduce an axial moving speed of the upper rail, achieve a silencing effect, as well as ensure that the upper rail and the middle rail are opened or closed on the lower rail in sequence, improve the transmission stability of the slide rail, and guarantee the normal use of a drawer.