Multidisc floor grinder

摘要

A multidisc floor grinder is constructed as a wheeled device that may be moved about the floor by means of a handle. The chassis of the floor grinder supports a bearing housing on gimbals that allow the bearing housing to vary in orientation as the device is moved across an uneven floor. The gimbals are aligned to allow rotation of the bearing housing about a bearing housing axis that is parallel to the floor. The bearing housing supports a main drive shaft which extends downwardly from the bearing housing. The main drive shaft is rotatable relative to the bearing housing within its bearings. A grinder mounting frame is rotatably mounted about the main drive shaft and is supported therefrom. The grinder mounting frame is driven in rotation about the main drive shaft at a greatly reduced speed relative to the rotation of the main drive shaft. The grinder mounting frame carries a plurality of grinding elements which are also driven from the main drive shaft, but at a substantially increased speed of rotation relative thereto. The grinding elements thereby rotate not only about their own axes, but also about the axis of the main drive shaft so as to cover a relatively large floor area with relatively small grinding elements. This arrangement substantially reduces the time required to grind paint or other matter from a floor surface.