A flat 2D mechanical engineering schematic diagram of a shaft mechanism, patent drawing style, black and white clean line art on a solid white background. Side view. A central horizontal shaft has a fixed mass in the middle. On the left and right are two movable sleeves. A single small gear wheel is placed below to link and mirror the axial movement of both sleeves. The sleeves clearly show a diagonal helical slot with a guide pin. Very simple, highly structured, clear function, technical blueprint style, no text, no shading, no chaotic overlapping. See more