MECHANICAL DEVICE, WORKING VEHICLE, AND DETERIORATION STATE ESTIMATION SYSTEM AND DETERIORATION STATE ESTIMATION METHOD OF MACHINE COMPONENT

摘要

A mechanical device includes a housing, a transparentspacer member, a magnet, and an image capturing device.The housing has an internal space in which a machinecomponent immersed in oil is housed. The spacer member isdisposed in an opening of the housing. The magnet issupported by the spacer member. The image capturing devicecaptures the internal space of the housing via the spacermember.