| 摘要 |
1493854 Bearings; toothed gearing I NADELLA and A PITNER 28 Feb 1975 [5 March 1974] 8421/75 Headings F2A and F2Q A cylindrical bushing for a plain bearing having in one of its cylindrical wall surfaces at least one rectilinear groove opening on to an open end of the bushing is made by subjecting a flat blank to a single pressing operation that simultaneously forms the cylindrical wall and the or each groove. The bushing may be open at both ends, or cup-shaped (Fig. 1) or may have a flange at one end (Fig. 5). The flat blank may be so constrained in a die that the pressed bushing has (Fig. 5) or lacks (Fig. 1) bulges opposite the location of grooves. If bulges are formed, they may be retained, or removed. In a rack-and-pinion assembly (Fig. 7) a bearing surface 36a of shaft 37 is journalled in cupshaped bushing 33. The operation of rack 41 and pinion 38 urges lubricant towards grooves 4 of the bushing. Shaft element 47 is held in a needle or roller bearing. The use of a flanged bushing in a combined radial-axial bearing is also described. |
