DECOUPLER CLUTCH ENGAGEMENT SURFACE WITH SELECTED SURFACE FINISH

摘要

In an aspect, the invention is directed to a clutched device that includes a clutch input member, a clutch output member, and a wrap spring clutch. The wrap spring clutch is engageable with the clutch input member and the clutch output member and has a radially outer surface and a radially inner surface. One of the radially outer and inner surfaces is engageable with a clutch engagement surface on one of the clutch input member and the clutch output member. The clutch engagement surface has a surface fin ish that includes a plurality of peaks and valleys, wherein the peaks engage the wrap spring clutch and each have a selected width.

主权项

1. A clutched device, comprising:
a clutch input member; a clutch output member; a wrap spring clutch that is engageable with the clutch input member and the clutch output member and which has a radially outer surface and a radially inner surface, wherein one of the radially outer and inner surfaces is engageable with a clutch engagement surface on one of the clutch input member and the clutch output member; and a volume of lubricant positioned to lubricate the wrap spring clutch and the clutch engagement surface, wherein the clutch engagement surface has a surface finish that includes a plurality of peaks and valleys, wherein the peaks engage the wrap spring clutch and each have a selected width that is based at least in part on one or more properties selected from: a yield strength of a material making up the clutch engagement surface; and a working range of temperatures of the lubricant.