Abrasion detection mechanism for sky rail guide wheel of stacking machine

The utility model discloses a stacker sky rail guide wheel wear detection mechanism, which comprises two sky rail protection wheels, a protection wheel seat, two first detection devices and two second detection devices, the protection wheel seat is arranged below a sky rail, the protection wheel seat is respectively provided with one sky rail protection wheel on the left side and the right side of the sky rail, and each sky rail protection wheel can rotate around the axis of the sky rail protection wheel; the bottom of each sky rail protection wheel downwards penetrates out of the protection wheel base, a first detection device is correspondingly arranged at the end, downwards penetrating out of the protection wheel base, of each sky rail protection wheel, and the first detection devices rotate in the same direction along with rotation of the sky rail protection wheels. A second detection device is correspondingly placed below each first detection device, and each second detection device is connected with an