This invention relates to a cable reel device, a window cleaning
robot base station, and a window cleaning
robot system. The cable reel device includes a housing, a reel, and a
clutch transmission mechanism. The
clutch transmission mechanism includes a drive
assembly, a
clutch gear, a guide wheel, and an elastic element. The clutch gear includes an upper gear and a lower gear coaxially arranged and axially movable relative to each other. The upper gear is driven by the drive
assembly, and the lower gear is driven by the reel. The guide wheel is located above the upper gear, and a
mating structure is provided between them. The elastic element is located between the upper and lower gears. When the drive
assembly drives the upper gear to rotate, an
axial force is generated through the
mating structure to overcome the elastic force of the elastic element, pushing the upper gear and lower gear to mesh and drive the reel to take in the safety
rope. When the cable is taken in, the drive assembly stops outputting, the
mating structure disengages, and no longer generates an
axial force. The elastic element, relying on its elastic
restoring force, drives the upper gear to reset, causing the upper gear and lower gear to disengage, and the reel returns to its
free state.