| 摘要 |
1,090,119. Bearings. SPYRA FLO Inc. Dec. 4, 1964 [May 27; 1964], No. 49470/64. Heading F2A. A self-aligning bearing unit 10 for a rotatable shaft (not shown) includes a bearing bush 12, having bore 18 wherein said shaft can be lodged, and part-spherical surfaces 21, 22 that engage with annular seats 77, 32 defined by a resilient washer 74, which has a V-shaped profile in cross-section and a flange 30 at the base of a tubular portion 24 of a housing, or socalled retainer, 14, for the bush, respectively, the washer being in abutment with a ring 26 constituting a part of said housing. The bush 12 may be made of porous material, e.g. sintered bronze, that may be impregnated with a lubricant, e.g. oil. A space 70 between the bush and the housing is filled with a wicking material 72, e.g. cellulose fibre, which is impregnated with oil and is stated to have the appearance of an aggregation of crumbs. The portion 24 of the housing is made of a relatively soft material, e.g. die-cast zinc, whereas the ring 26 is made of a harder material, e.g. carbon steel, so that the ring can be pressed into the upper end of said portion by a ram (100), Fig. 4 not shown), while the said portion is supported by an anvil (94, 95), a proportion of the soft material being forced into an annular groove (90) in the ring during the pressing operation. A flange 82 on the ring 26 has a knurled edge and defines with the portion 24 an annular groove (115), Fig. 6 (not shown), whereby the bearing unit can be pressed into an aperture (122), Fig. 7 (not shown), in a supporting plate 16 by a ram (130) while the plate 16 is supported by an anvil (120). . In a first modification. Fig. 8 (not shown), the washer 74 is replaced by a flat washer (274), which is slit radially to form flexible fingers (279) that are bent by abutment with the ring (226) at the top of the housing to form a seat for the bearing bush. In a second modification, Fig. 9 (not shown), the seat 77 is defined by the ring (326) at the top of the housing and the seat 32 is defined by a washer (374) lodged in the bottom of the housing, which washer is similar to the washer 74 and is inverted. In a third modification, Fig. 10 (not shown), the ring 26 is replaced by a flexible ring (426) that is shaped to form the seat 77 in a manner similar to the washer 74, the ring being attached to the tubular portion (424) of the housing by axial projections (451) thereon engaging with holes in the ring, which projections are peened at their ends. In a fourth modification. Figs. 11 and 12 (not shown), the washer 74 is replaced by a ring (574) made of plastics material, e.g. nylon, that is deformed by the ring (526) at the top of the housing so as to provide a seat (677) for the upper end-of the bearing bush. |
